19-4323; Rev 3; 5/94 +5V-Powered, Multi-Channel RS-232 General Description The MAX220-MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communi- cations interfaces, and in particular, for those applica- tions where +12V is not available. These parts are particulary useful in battery-powered systems since their low-power shutdown mode reduces power dissipation to less than 5uW. The MAX225, MAX233, MAX235, and MAX245-MAX247 use no exter- nal components and are recommended for applications where printed circuit board space is critical. MAXIM Drivers/Receivers Features Superior to Bipolar # Operate from Single +5V Power Supply (+5V and +12V--MAX231 and MAX239) # Low-Power Receive Mode in Shutdown (MAX223/MAX242) @ Meet All EIA/TIA-232E and V.28 Specifications Multiple Drivers and Receivers % 3-State Driver and Receiver Outputs Open-Line Detection (MAX243) Applications Ordering Information PART TEMP. RANGE PIN-PACKAGE Portable Computers * L p Mod MAX220CPE 0C to +70C 16 Plastic DIP Ow-rower Modems MAX220CSE 0C to +70C 16 Narrow SO Interface Translation MAX220CWE 0C to +70C 16 Wide SO Battery-Powered RS-232 Systems MAX220C/D OC to +70C Dice* Multi-Drop RS-232 Networks MAX220EPE -40C to +85C 16 Plastic DIP MAX220ESE -40C to +85C 16 Narrow SO MAX220EWE -40C to +85C 16 Wide SO MAX220EJE -40C to +85C 16 CERDIP MAX220MJE -55C to +125C 16 CERDIP Ordering Information continued at end of data sheet. Contact factory for dice specifications. . Selection Table Power No. of Nominal SHDN Rx Part Supply RS-232 No. of Cap. Value & Three- Active in Data Rate Number (Vv) Drivers/Rx Ext. Caps (uF) State SHDN {kbps) Features MAX220 +5 2/2 4 4.7410 No 120 Ultra low-power, industry-standard pinout MAX222 +5 2/2} 4 01 Yes 200 +5V IBMPC serial port with receivers active in shutdown MAX223 (MAX213) +5 4/5 4 1.0 (0.1) Yes 120 MAX241 + receivers active in shutdown MAX225 +5 55 0 - Yes v 120 Available in SO MAX230 (MAX200) +5 5/0 4 1.0 (0.1) Yes 120 5 drivers with shutdown MAX231 (MAX201) +5 and 2/2 2 1.0 (0.1) No 120 Standard +5/+ 12V or battery supplies; same +75 to +13.2 functions as MAX232 MAX232 (MAX202) +5 2/2 4 1.0 (0.1) No 120 (64) Industry standard MAX232A +5 2/2 4 0.4 No 200 Higher slew rate, small caps MAX233 (MAX203) +5 2/2 0 - No 120 No external caps MAX233A +5 2/2 0 ~ No 200 No external caps, high slew rate MAX234 (MAX204) +5, 4/0 4 1.0 (0.1) No 120 Replaces 1488 MAX235 (MAX205) +5 5/5 a - Yes 120 No external caps MAX236 (MAX206) +5 4/3 4 1.0 (0.1) Yes 120 Shutdown, three-state MAX237 (MAX207) +5 5/3 4 1.0 (0.1) No 120 Complements IBM PC serial port MAX238 (MAX208} +5 4/4 4 1.0 (0.1) No 120 Replaces 1488 and 1489 MAX239 (MAX209) +5 and 3/5 2 1.0 (0.1) No 120 Standard +5/+12V or battery supplies: single +75 to +13.2 package solution for IBM PC serial port MAX240 +5 5/5 4 10 Yes 120 DIP or flatpack package MAX241 (MAX211) +5 4/5 4 1.0 (0.1) Yes 120 Complete IBM PC serial port MAX242 +5 a2 4 o7 Yes v DOO Separate shutdown and enable ~ MAX243 +5 2f2 4 O41 No 200 Open-line detection simplifies cabling MAX244 +5 8/10 4 1.0 No 120 High slew rate MAX245 +5 8/10 0 - Yes Vv 120 High slew rate, int. caps, two shutdown modes MAX246 45 8/10 0 - Yes v 120 High slew rate, int. caps, three shutdown modes MAX247 +5 8/9 0 ~ Yes v 120 High slew rate, int. caps, nine operating modes MAX248 +5 8/8 4 1.0 Yes v 120 High slew rate, selective half-chip enables MAX249 +5 6/10 4 1.0 Yes v 120 Available in quad flatpack package MA AXIAAN Maxim Integrated Products Call toll free 1-800-998-8800 for free samples or literature. 2-85 6PCXVIN-OCCXVWNMAX220-MAX249 +5V-Powered, Multi-Channel RS-232 16-Pin Narrow SO (derate 8.70mMW/C above +70C) 16-Pin Wide SO (derate 9.52mW/C above +70C)......... 18-Pin Wide SO (derate 9.52mW/C above +70C).......... 20-Pin Wide SO (derate 10.00mW/C above +70C)....... 16-Pin CERDIP (derate 10.00mW/C above +70C) ........ 18-Pin CERDIP (derate 10.53mW/C above +70C) ........ Operating Temperature Ranges Drivers/Receivers ABSOLUTE MAXIMUM RATINGSMAX220/222/232A/233A/242/243 Supply Voltage (Voc) ..:-cccccceceteecteetetereetenetennereens -0.3V to +6V Input Voltages TIN) csccsssscessssstessassssccasssstesssssusscesssseessasseeen -0.3V to (Veg - 0.3V) Ry) coessecsecsucseecesessseesesstecescsscesssasesssseessestecasessuiesiecaneaveesestese +30V Tout (NOG 1) veces eesscasssnseessssunssecsssnseeesssnnessessasees +15V Output Voltages TOUT see cvvesessscecsssttesceeesevecesssneresesesivenseastutcesnitenseesesaveeecasaeas +15V Rour Driver/Receiver Output Sho Continuous Continuous Power Dissipation (T, = +70C) 16-Pin Plastic DIP (derate 10.53mW/C above +70C) ....842mW 18-Pin Plastic DIP (derate 11.1 1mW/C above +70C) ....889mMW 20-Pin Plastic DIP (derate 8.00mW/C above +70C) ......440mW MAX2 AC __, MAX2__C__ 10C to 70C MAX2 __ AE__, MAX2__E__ -40C to +85C MAX2__ AM__, MAX2__M ..-55C to +125C Storage Temperature Range .............. ..-65C to +160C Lead Temperature (soldering, 10 S@C)......0... cece +300 Note 1: Input voltage measured with Toyz in high-impedance state, SHDN or Voc = OV. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICSMAX220/222/232A/233A/242/243 (Voc = +5V 10%, C1-C4 = 0.1pF, Ta = Ty to Tuax, unless otherwise noted.) PARAMETER | CONDITIONS [ MIN TYP MAX [UNITS RS-232 TRANSMITTERS Output Voltage Swing All transmitter outputs loaded with 3kQ to GND +5 +8 Vv Input Logic Threshold Low 1.4 0.8 Vv Input Logic Threshold High 2 1.4 Vv Logic Pull-Up/Input Current Normal operation 5 40 pA g pine SHON = OV, MAX222/242, shutdown +001 24 Vcc = 5.5V, SHDN = OV, Vout = +15V, MAX222/242 +0.01 +10 Output Leakage Current mipur eanage wurre Vec = SHDN = OV, Vour = 15V +001 10 WA Data Rate Except MAX220, normal operation 200 116 kbits/ MAX220 22 20 sec Transmitter Output Resistance Veco = V+ V- = OV, Vout =+2V 300 10M Q Output Short-Circuit Current VouT = OV +7 +22 mA RS-232 RECEIVERS RS-232 input Voltage Operating Range +30 Vv E t MAX243 R2 08 1.3 RS-232 Input Threshold Low Voc = BV mee? IN V MAX243 R2IN (Note 2) -3 E: tt MAX243 R2; 18 24 RS-232 Input Threshold High Veo =5V xoeP IN V MAX243 R2In (Note 2) 05 01 E t MAX243 = 5V hyst. i dn. . 0. 1 RS-232 Input Hysteresis xcePp Vee no hyst. in shdn 0.2 $ Vv MAX243 1 RS-232 Input Resistance 3 5 7 kQ TTL/CMOS Output Voltage Low louT = 3.2mA 0.2 04 Vv TTL/CMOS Output Voltage High lout = -1.0mA 35 Vcec-02 V S ing Vi = GND -2 -10 TTLICMOS Output Short-Circuit Current oureing OUT mA Shrinking Vout = Vec 10 30 TTL/CMOS Output Leakage Current SHON = Vcc or EN = Voc, OV < VouT $ Vcc +0.05 10 HA 2-66 PAAXILAA+5V-Powered, Multi-Channel RS-232 = a Drivers/Receivers ELECTRICAL CHARACTERISTICSMAX220/222/232A/233A/242/243 (continued) = (Veco = +6V 410%, C1-C4 = 0.1pF, Ta = Tein to Tay. unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS EN Input Threshold Low MAX242 1.4 0.8 v EN Input Threshold High MAX242 2.0 1.4 Vv ND) POWER SUPPLY N Operating Supply Voltage 45 5.5 Vv No load MAX220 0.5 2 = Voc Supply Current (SHDN = Vcc), MAX222/232A/233A/242/243 4 10 Figures 5, 6, 9, 19 3kQ load MAX220 12 mA both outputs MAX222/232A/233A/242/243 15 Ta = +25C 0.1 10 WN Shutdown Supply Current MAX222/242 Ta= 0" to + 70C 2 20 uA Ta = -40 to +85C 2 50 Ta = -55 to +125C 35 100 SHDN Input Leakage Current MAX222/242 +1 pA SHDN Threshold Low MAX222/242 1.4 0.8 v SHDN Threshold High MAX222/242 2.0 1.4 Vv AC CHARACTERISTICS a Re - aot MAX222/232A/233A/242/243 6 12 30 Transition Slew Rate Vec = 5Y, Ta = +25C, Vis m +3V meanoser say |marze is 3 MAX222/232A/233A/242/243 13 3.5 Transmitter Propagation Delay {PHLT MAX220 4 10 Figure pce Wormal Operation) tut MAX222/232A/203A/242/243 is 35. |" MAX220 5 10 MAX222/232A/233A/242/243 0.5 1 Receiver Propagation Delay 'PHLR MAX220 06 3 Figure mal Operation) a MAX222/232A/253A/242/243 06.1 HS MAX220 08 3 Receiver Propagation Delay tPHLS MAX242 0.5 10 RS-232 to TLL (Shutdown), Figure2 [pcg MAX242 35 10 HS Receiver-Output Enable Time, Figure 3 | ter MAX242 125 500 ns Receiver-Output Disable Time, Figure 3 | tor MAX242 160 500 ns Transmitter-Output Enable Time MAX222/242, 0. IF caps (SHDN goes High), Figure 4 ter {includes charge-pump start-up) 280 HS (SHON goss Lew), Figures tor MAX222/242, 0.1pF caps 600 ns Transmitter + to - Propagation IPHLT -1PLHT MAX222/232A/233A/242/243 300 ns Delay Difference (Normal Operation) MAX220 2000 Receiver + to - Propagation MAX222/232A/233A/242/243 100 Delay Difference (Normal Operation) 'PHLR - TPLHR MAX220 225 ns Note 2: MAX243 R2ouT is guaranteed to be low when R2jn is 2 OV or is floating. MAAXLM 2-87MAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers Typical Operating Characteristics MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243 OUTPUT VOLTAGE vs. LOAD CURRENT AVAILABLE OUTPUT CURRENT ON-TIME EXITING SHUTDOWN - vs. DATA RATE MAX222/MAX242 10 _ u 1 1 ' +0V u OUTPUT LOAD CURRENT Vs 8 T i I ~ pF CAPS EITHER V+ OR V- LOADED 1] oS FLOWS FROM V+ TOV. ~ 1 6h > | | O.1pF CAPS 4 Ott _| s ALL CAPS [> +5V = Voc +5 NO LOAD ON 9p Wee 15.25 =" tS 2 L. _ TRANSMITTER OUTPUTS = uw oOV gf LEXGEPTMAX220, MAXZ33A) Bar + = y So s = 0 = 3 ALL CAPS : S 5 ak _I ee Te . | = V- LOADED. NO LOAQ ON V+ 2 O.1uF Voc = +4.75V a ee tyr CAPS a 4 OtpF IuF 4 3 6 \ > - b_ a TS ~~ CN 5 te O.1pF CAPS 4 | ; 5 | 0 V+ LOADED, NO LOAD ON V- 4 av 6 5 10 56208 0 0 2 30 4 50 60 LOAD CURRENT (rA} DATA RATE (kbils/sec) 500us/div 2-88 MAAXLM+5V-Powered, Multi-Channel RS-232 Drivers/Receivers ABSOLUTE MAXIMUM RATINGSMAX223/MAX230-MAX241 20-Pin Wide SO (derate 10.00mW/C above +70C)....... s00mw 24-Pin Wide SO (derate 11.76mW/C above +70C) ....... 941mW 28-Pin Wide SO (derate 12.50mW/C above +70C) .....1{000mW Input Voltages 44-Pin Plastic FP (derate 11.1 1mW/C above +70C)......889mW x Vp ecceeeceeecenseeeecestenetseeceeaeseseteceneneveaseeenters -0.3V to (Voc + 0.3V) 14-Pin CERDIP (derate 9.09mW/C above +70C) .......... 727mW iS) Ryn cecceeeesecececueeseeeseseeetevscneseesceensestenecenensesensasisesreveaeaeaeetane +30V 16-Pin CERDIP (derate 10.00mW/C above +70C) ........ 800mW Nb Output Voltages 20-Pin CERDIP (derate 11.1 imW/C above +70C) ........ 889mW TOUT eee ee cece rene tere trate tsee tense tenet nents (V+ + 0.3V) to (V- - 0.3V) 24-Pin Narrow CERDIP RUT cesvscececeeeeteeteceeetseiersatesaseentateseeensenes -0.3V to (Veg + 0.3V) (derate 12.50mW/C above +70C}......1000mW { Short-Circuit Duration, Tour... Continuous 24-Pin Sidebraze (derate 20.0mW/C above +70C) .....1600mW = Continuous Power Dissipation (T, = +70C) 28-Pin SSOP (derate 9.52mW/C above +70C)............. 762mW 14Pin Plastic DIP (derate 10.00mW/C above +70C) ....800mW Operating Temperature Ranges 16-Pin Plastic DIP (derate 10.53mW/C above +70C) ....842mW MAXK2 @ 8 Co cece crete erect ett tetieteteenies OC to +70C 20-Pin Plastic DIP (derate 11.11mW/C above +70C) ....889mMW MAX2 Ee 40C to +85C 24-Pin Narrow Plastic DIP MAX2_ M__w. -55C to +125C N (derate 13.39mW/C above +70C).....1067mMW Storage Temperature Range ............... -65C to +160C SN 24-Pin Plastic DIP (derate 9.09mW/C above +70C) ......500mMW Lead Temperature (soldering, 10 SC) oe +300C 16-Pin Wide SO (derate 9.52mW/C above +70C) ......... 762mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICSMAX223/MAX230-MAX241 pz: (MAX223/230/232/234/236/237/238/240/241 Vog = +5V 10%, MAX233/MAX235 Voc = 5V +5%, C1-C4 = 1.0UF, MAX231/MAX23! Voc = 8V 410%, V+ = 7.5V to 13.2V, Ta = Tryin to Tax, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS Output Voltage Swing All transmitter outputs loaded with 30k to ground +5.0 +73 Vv MAX232/233 5 10 Voc Power-Supply Current re 1080 oc MAX232/230/234-238/240/24 1 7 15 mA MAX23 1/239 4 1 MAX231 1.8 5 V+ Power-Supply Current mA MAX239 5 15 Shutd Supply C t T. 25C MAK223 * pA utdown Su urren = +25 pPly A MAX241 1 10 Input Logic Threshoid Low TIN; EN, SHDN (MAX223), EN, SHDN (MAX230/235-241) 0.8 Vv . . TIN 2.0 Input Logic Threshold High EN, SHDN (MAX223), EN, SHDN (MAX230/235-241) 2.4 Vv Logic Pull-Up Current TIN = OV 15 200 pA Receiver Input Voltage -30 +30 Vv Operating Range PAAXLAA 2-89MAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers ELECTRICAL CHARACTERISTICS MAX223/MAX230-MAX241 (continued) (MAX223/230/232/234/236/237/238/240/241 Vog = +5V +10%, MAX233/MAX235 Voc = 5V +5%, C1-C4 = 1.0UF, MAX231/MAX23 Veco = 5V +10%, V+ = 7.5V to 13.2V, Ta = Tyin tO Tax, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS Normal operation SHDN = 5V (MAX223) 0.8 1.2 . SHDN = OV (MAX235-MAX241) RS-232 Input Threshold Low vA = +25 c v cc= Shutdown (MAX223) SHON = ov, 0.6 15 EN = 5V (R4, R5) Normal operation SHDN = 5V (MAX223) 17 2.4 _ SHDN = OV (MAX235-MAX241) RS-232 Input Threshold High vA = 1a c Vv cc = Shutdown (MAX223) SHON = ov, 15 2.4 EN = 5V (R4, R5) RS-232 Input Hysteresis Vcc = 5V; no hysteresis in shutdown 0.2 0.5 1.0 Vv RS-232 Input Resistance Ta = +25C, Vcc = 5V 3 5 7 kQ TTLYCMOS Output Voltage Low lout = 1.6mA (MAX231-233 lout = 3.2mA) 0.4 Vv TTL/CMOS Output Voltage High lout = 1.0mA 3.5 Vcc-04 Vv OV < Rout s Vcc: TTIL/CMOS Output Leakage Current EN = OV (MAX223); EN = Voc (MAX235-241) 0.05 +10 LA . . Normal MAX223 600 Receiver Output Enable Time i ns ewer sup operation MAX235-MAX241 400 . : ; Normal MAX223 900 R Oo t D le T . n eceiver Output Disable Time operation MANZE: MAKE 250 s RS-232 IN Norma! operation 0.5 10 Propagation Delay oor WCMos SHDN = OV tPHLS 40 BS Cus t50pF | (MAX223) tPLHS 40 MAX223/MAX230/MAX234-241 Ta = +25C, Vcc = 5V 3 54 30 RL = 3kQ to 7kQ, CL = S5OpF to 2500pF, , measured from +3V to -3V or -3V to +3V Transition Region Slew Rate Vis MAX231/MAX232/MAX233 Ta = +25C, Vcc = 5V 4 30 Ri = 3kQ to 7kQ, CL = 50pF to 2500pF, measured from +3V to -3V or -3V to +3V Transmitter Output Resistance Voc = V+ = V- = OV, Vout = 2V 300 Q Receiver Out Short-Circuit Current +10 mA 2-90 MAAXAIAVor (V) Vou (V) +5V-Powered, Multi-Channel RS-232 Drivers/Receivers a 85 80 75 70 65 60 65 -70 8.0 wn -9.0 MAAXLM TRANSMITTER OUTPUT VOLTAGE (Von) vs. Voc I 2 TRANSMITTERS, LOADED 1 1 TRANSMITTER LOADED 7 Ta= 425C a 3 TRANS- MITTERS KL LOADED C1-C4= tyr Loi. t ThasswrTeR 4 TRANSMITTERS 5 3KQ2 II 2500pF 45 50 Vec (V) TRANSMITTER OUTPUT VOLTAGE (Vou) vs. Voc 5.5 4TRANS- Ta=+25C MITTERS 1-C4= ates 1 TRANS- Ss MITTER | LOADED 2TRANS- 3 TRANS- EMITTERS MITTERS LOADED LOADED 4 45 5.0 Vee (V) 55 TRANSMITTER OUTPUT VOLTAGE (Von) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES 74 72 r0 SS mc = 68 | txKBITSIseC os = BOKBITS/SEC B gg | 2OKBITSISEC N | | _Ta= +25C oa Voc : +9V 3 TRANSMITTERS LOADED 6.2 FAL = 3k C1-C4 = pF 60 1 I J 0 500 1000-1500 2000-2500 LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE (Vou) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES 6.0 _ T= 125 $62 / 5 Thatarens LOADED Sf -6 4 [RL = 3K6 HOH Ca= 1p 7 6s [| Lf J t = 160KBITS/SEC YY = 68) B0KBITS/SEC A = gL 2xelTsisec 72 KS 74 a al | 76 ; 0 500 1000 = 1500 = 2000S 2500 LOAD CAPACITANCE (pF) V+, V- WHEN EXITING SHUTDOWN (1uF CAPACITORS) SHUTDOWN POLARITY !S REVERSED FOR THE MAX241 Typical Operating Characteristics MAX223/MAX230/MAX234-241 SLEW RATE (V/s) QUTPUT VOLTAGE V+. V- TRANSMITTER SLEW RATE s ys. LOAD CAPACITANCE Nf 12.0 1 TRANSMITTER LOADED 11.0 = 10.0 = | { 90 TRANSMITTERS LOADED 80 70 \ : a 60 [LOADED LOADED 40 0 500 1000 1500 2000 2500 LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE V+, V- Ea vs. LOAO CURRENT Ss 8 6 Ta=+25C, 4 =+ -C4= tpF 2 AND V- {V- LOADED, LOADED, 9 EQUALLY | NOLOAD LOAD LOADED ON V+. V- -2 , ALL TRANSMITTERS UNLOADED 6 8 -10 0 5 10 15 2 2 30 35 40 45 50 CURRENT (mA) 2-91MAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers ABSOLUTE MAXIMUM RATINGSMAX225/MAX244-MAX249 Supply Voltage (Voc)... eee ere etree -0.3V to +6V Input Voltages _ _ Ti, ENA, ENB, ENR, ENT, ENRA ENRB, ENTA, ENTE... Continuous Power Dissipation (Ta = +70C) 28-Pin Wide SO (derate 12.50mW/C above +70C) ..1000mW 40-Pin Plastic DIP (derate 11.11mW/C above +70C) .611mW 44-Pin PLCC (derate 13.33mW/C above +70C)....... 1067mWw -40C to +85C 68C to +160C Rineeesceeeeeteserreneeses i Operating Temperature Ranges: Tour (Note 3).. ceceteteneeeernstenenees +15V MAX225C _ _, MAX24_C__ Rout -0.3V to (VOC + 0.3V) MAX225E __, MAX24_E_ _ Short Circuit (1 output at a time) Storage Temperature Range Tout tO GND oo. r nner neenence tienes eaten Continuous Lead Temperature (soldering, 10 sec) Rout to GND oo eee ernst ete neensneniasetes Continuous Note 3: Input Voltage measured with transmitter output in a high-impedance state, shutdown, or Vog = OV. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditians beyond those indicated in the operational sections of the specifications is not implied. Exposure o absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICSMAX225/MAX244-MAX249 (MAX225 ye = 5.0V 45%; MAX244-MAX249 Voc = +5.0V + 10%, external capacitors C1-C4 = 1pF, Ta = Tyin to Tax, unless other- OC to +70C wise noted. PARAMETER | CONDITIONS [ MIN TYP) = MAX | UNITS RS-232 TRANSMITTERS Input Logic Threshold Low 1.4 0.8 Vv Input Logic Threshold High 2 1.4 Vv Normal operation 10 50 Logic Pull-Up/Input Current Tables tA-1D gic Pull-Up/input Curre 3 Shutdown +001 +1 yA Data Rate Tables1A-1B, Normal operation 120 64 kbits/sec Output Voltage Swing All transmitter outputs loaded with 3Qk to GND +5 +7.5 v ENA, ENB, ENT, ENTA, ENTB = Voc *001 #28 Output Leakage Current (Shutdown) Tables1A-1D pA +0.01 +25 Transmitter Output Resistance Voc = V+ = V- = OV, Vout = 2V (Note 4) 300 10M Q Output Short-Circuit Current Vout = OV +7 +30 mA RS-232 RECEIVERS RS-232 Input Voltage Operating Range +25 V RS-232 Input Threshold Low Vec = 5V 0.8 1.3 Vv RS-232 Input Threshold High Voc = 5V 1.8 2.4 Vv RS-232 Input Hysteresis Voc = 5V 0.2 0.5 1.0 v RS-232 Input Resistance 3 5 7 kQ TTL/CMOS Output Voltage Low louT = 3.2mA 0.2 0.4 Vv TTL/CMOS Output Voltage High lout = -t.0mA 3.5 Vcec-0.2 Vv S ing Vi = GND -2 -10 TTLICMOS Output Short-Circuit Current | Sourcing Vour = G mA Sinking Vout = Vcc 10 30 Normal operation, outputs disabled, TTL/CMOS Output Leakage Current Tables 1A-1D, 0V $ Vout < Voc, ENR. = Vcc +0.05 +0.10 pA 2-92 MAAXUM+5V-Powered, Multi-Channel RS-232 Drivers/Receivers ELECTRICAL CHARACTERISTICSMAX225/MAX244-MAX249 (continued) (MAX225 Veg = 5.0V +5%; MAX244-MAX249 Voc = +5.0V + 10%, external capacitors C1-C4 = 1pF, Ta = Tryin to Tax. unless other- wise noted. PARAMETER | CONDITIONS [| MIN TYP MAX | UNITS POWER SUPPLY AND CONTROL LOGIC Operating Supply Voltage MAX225 47 8.28 Vv Peraing Supply vouag MAX244-MAX249 45 55 MAX225 10 20 No Load . MAX244-MAX249 11 30 Voc Supply Current (Normal Operation) mA 3kQ loads on all MAX225 40 outputs MAX244-MAX249 57 Ta = +25C 8 25 Shutdown Supply Current pPly Ta = TMIN to Taax 50 BA Leakage Current +1 pA Control Input Threshold Low 1.4 0.8 V Threshold High 2.4 1.4 AC CHARACTERISTICS CL = 50pF to 2500pF, RL = 3kM to 7kQ, Transition Slew Rate Voc = 5V, Ta = +25C, 5 10 30 Vis measured from +3V ta -3V or -3V to +3V Transmitter Propagation Delay tPHLT 1.3 3.5 TTL to RS-232 (Normal Operation), ps Figure 1 tPLHT 1.5 3.5 Receiver Propagation Delay tPHLR 0.6 1.5 TTL to RS-232 (Normal Operation), ps Figure 2 tPLHR 0.6 1.5 Receiver Propagation Delay tPHLS 06 10 TTL to RS-232 (Low Power Mode), us Figure 2 tPLHS 3.0 10 Transmitter + to - Propagation Delay Difference (Normal Operation) TPHLT - {PLHT 350 ns Receiver + to - Propagation Delay Difference (Normal Operation) 'PHLT - (PLHT 350 ns Receiver-Output Enable Time, Figure 3 teR 400 500 ns Receiver-Output Disable Time, Figure 3 | tor 100 500 ns MAX246-249 5 us (excludes charge-pump startup) Transmitter Enable Time teT MAX225/MAX245-MAX249 10 ms (includes charge-pump startup) Transmitter Disable Time, Figure 4 toT 100 ns Note 4: The 3002 minimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or Vcc = 0 is 10MQ as is implied by the leakage specification. MAAXIIMM 67CXVIN-OCCXVN 2-93MAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers MAX225/MAX244-MAX249 TRANSMITTER SLEW RATE OUTPUT VOLTAGE vs. LOAD CAPACITANCE vs. LOAD CURRENT FOR V+ AND V- 10 6 Vec = 5V 8 _== _ EXTERNAL POWER SUPPLY 5 |W AND V- LOADED aiTHER Vs OR a ox CAPACITORS 1p FADED > Sa DATA RATE 40kb/s s ers e 8 TRANSMITTERS 3 2 T EXTERNAL CHARGE PUMP z= 10 LOADED 3k J 0 [CAPACITORS 1p a S _p | WITHS TRANSMITTERS = 8 5 DRIVING 5kQ AND = 4 F 2000pF AT 20kbitss = __] = 6 E f_ 3B S 6 Lvs AND V- LOADED Lone = 4 8 a __| > 40 V+ LOADED 0 1 2 3 4 5 0 5 10 15 2 2% 30 35 LOAD CAPACITANCE (nF) LOAD CURRENT (mA) 2-94 TRANSMITTER OUTPUT VOLTAGE (V+/V-) Typical Operating Characteristics TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES 85 WITH 75 40kb/s 60kb/s 65 100kb/s 5.5 ALL CAPACITORS 2 3 4 LOAD CAPACITANCE (nF) wn o MAAXLM+5V-Powered, Multi-Channel RS-232 Drivers/Receivers 6PCXVN-O2CXVN oy OUTPUT vec OUTPUT Uff ceceeee ede Meee eee OV ff MUEPUR Ne 80% nek ve ff eens GND at ee er PuR - + fs * EXCEPT FOR R2 ON THE MAX243 WHERE -3V 1S USED. Figure 1. Transmitter Propagation Delay Timing Figure 2. Receiver Propagation Delay Timing " 2 axour * Rx IN ne Voc -2V BV SHDN A. TEST CIRCUIT 150pF ov EN INPUT oy r@ QUTPUT DISABLE TIME (to7) ov 1 ' + EN Ve ! _ s OUTPUT ENABLE TIME (ter) mo ; ov RECEIVER Po fmm OUTPUTS V- ' B. ENABLE TIMING A. TIMING DIAGRAM +V = EN eNinpur * = OUTPUT DISABLE TIME (tpr} TORG 1% VoH : ON eee Vow -0 5V 3k = 5OpF RECEIVER : OUTPUTS : Voc -2V fo Vou +0.5V B. TEST CIRCUIT 7 _ Vou C. DISABLE TIMING Figure 3, Receiver-Output Enable and Disable Timing Figure 4. Transmitter-Output Disable Timing MAAXLSA 2-95MAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers Table 1a. MAX225 Control Pin Configurations ENT ENR OPERATION STATUS TRANSMITTERS RECEIVERS 0 0 Norma! Operation All Active All Active a 1 Normal Operation All Active All 3-State 1 0 Shutdown All 3-State All Low-Power Receive Mode 1 1 Shutdown All 3-State All 3-State Table 1b. MAX245 Control Pin Configurations _ TRANSMITTERS RECEIVERS ENT ENA OPERATION STATUS TA1-TA4 1B1-TB4 AIA1-RA5 AB1-RB5 0 0 Normal Operation All Active All Active All Active All Active 0 1 [Normal Operation | Alll Active All Active Aas aye | Rae Rove ee All Low Power Ail Low Power 1 0 Shutdown All 3-State All 3-State Receiver Mode Receiver Mode RA1-RA4 3-State RB1-RB4 3-State 1 1 Shutdown All 3-State All 3-State RAS Low-Power RAS Low-Power Receiver Mode Receiver Mode Table 1c. MAX246 Control Pin Configurations = TRANSMITTERS RECEIVERS ex | ENS | OPERATION ATUS TA1-TA4 1TB1-TB4 RA1-RAS RB1-RB5 0 0 Normal Operation | All Active All Active All Active All Active . . . RB1-RB4 3-State 0 1 Normal Operation | All Active All 3-State All Active RBS Active 1 0 | Shutdown All 3-State All Active PARA S State | all Active RA1-RA4 3-State RB1-RB4 3-State 1 1 Shutdown All 3-State All 3-State RAS Low-Power RAS Low-Power Receiver Mode Receiver Mode 2-96 PRAAXISZA+5V-Powered, Multi-Channel RS-232 =z a Drivers/Receivers Table 1d. MAX247/248/249 Control Pin Configurations TRANSMITTERS RECEIVERS MAX247 | TA1-TA4 | TB1-TB4 RA1-RA4 RB1-RB5 ENTA ENRA|ENRB| OFSRATION TUS MAX248 | TA1-TA4 | TB1-TB4 RA1-RA4 RB1-RB4 MAX249 | TA1-TA3 | TB1-TB3 RA1-RAS RB1-RB5 0 0 0 Normal Operation All Active | All Active | All Active All Active All 3-State, except 0 0 1 Normal Operation All Active | Alt Active | All Active RBS stays active on MAX247 0 1 0 Normal Operation All Active | All Active | All 3-State All Active Ail 3-State, except 0 1 1 Normal Operation All Active | All Active | All 3-State RBS stays active on MAX247 0 0 a Normal Operation All Active | Ail 3-State | All Active All Active All 3-State, except 0 0 1 Normal Operation All Active | All 3-State | All Active RBS stays active on MAX247 0 1 0 Normal Operation All Active | All 3-State | All 3-State All Active Ali 3-State, except 0 1 1 Normal Operation All Active | All 3-State| Al! 3-State RBS stays active on MAX247 1 0 0 Normal Operation All 3-State | All Active | Ali Active All Active All 3-State, except 1 0 1 Normal Operation All 3-State | All Active | All Active RBS stays active on MAX247 1 1 0 Normal Operation All 3-State | All Active | All 3-State Ail Active All 3-State, except 1 1 1 Normal Operation All 3-State| All Active | All 3-State RB5 stays active on MAX247 Low-Power Low-Power 1 0 0 Shutdown All 3-State | All 3-State Receive Mode Receive Mode Low-Power All 3-State, except 1 0 1 Shutdown All 3-State | Ali 3-State : RB5 stays active on Receive Mode MAX247 Low-Power 1 1 0 Shutdown All 3-State } All 3-State | All 3-State Receive Mode All 3-State, except 1 1 1 Shutdown All 3-State | All 3-State | All 3-State RB5 stays active on MAX247 MAAXILMMA 2-97 i 6rYZXVI-OZZXUWNMAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers Detailed Description The MAX220-MAX249 contain four sections: dual charge- pump DC-DC voltage converters, RS-232 drivers, RS-232 receivers, and receiver and transmitter enable control inputs. Dual Charge-Pump Voltage Converter The MAX220-MAX249 have two internal charge-pumps that convert +5V to +10V (unloaded) for RS-232 driver operation. The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the V+ output. The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V- output. A small amount of power may be drawn from the +10V (V+) and -10V (V-) outputs to power external circuitry (see Typical Operating Characteristics), except on the MAX225 and MAX245-MAX247, where these pins are not available. V+ and V- are not regulated, so the output volt- age drops with increasing load current. Do not load V+ and V- to a point that violates the minimum +5V EIA/TIA-232E driver output voltage when sourcing current from V+ and V- to external circuitry. When using the shutdown feature in the MAX222, MAX225, MAX230, MAX235, MAX236, MAX240, MAX241 and MAX245-MAX249 avoid using V+ and V- to power external circuitry. When these parts are shut down, V- falls to OV, and V+ falls to +5V. For applications where a +10V external supply is applied to the V+ pin (instead of using the internal charge pump to generate +10V), the C1 capacitor must not be installed and the SHDN pin must be tied to Vcc. This is because V+ is internally con- nected to Vcc in shutdown mode. RS-232 Drivers The typical driver output voltage swing is +8V when loaded with a nominal 5kQ RS-232 receiver and Vec = +5V. Output swing is guaranteed to meet the EIA/TIA-232E and V.28 specification, that calls for 5V minimum driver out- put levels under worst-case conditions. These include a minimum 3kQ load, Vcc = +4.5V, and maximum operat- ing temperature. Unloaded driver output voltage ranges from (V+ -1.3V) to (V- +0.5V). Input thresholds are both TTL and CMOS compatible. The inputs of unused drivers can be left unconnected since 400kQ input pull-up resistors to Vcc are built-in. The puli- up resistors force the outputs of unused drivers low because all drivers invert. The internal input pull-up resis- tors typically source 12nA, except in shutdown mode where the pull-ups are disabled. Driver outputs turn off and enter a high-impedance statewhere leakage current is typically microamperes (maximum 25u4A}when in shut- down mode, in three-state mode, or when device power is removed. Outputs can be driven to +15V. The power-sup- ply current typically drops to 8A in shutdown mode. 2-98 The MAX239 has a receiver 3-state control line, and the MAX223, MAX225, MAX235, MAX236, MAX240 and MAX241 have both a receiver 3-state control line and a low-power shutdown control. The receiver TTL/CMOS outputs are in a high-impedance 3-state mode whenever the 3-state ENable line is high, and are also high-imped- ance whenever the shutdown control line is high. When in low-power shutdown mode, the driver outputs are turned off and their leakage current is less than 1pA with the driver output pulled to ground. The driver output leak- age remains less then 1pA, even if the transmitter output is backdriven between OV and (Vcc + 6V). Below -0.5V the transmitter is diode clamped to ground with 1kQ series impedance. The transmitter is also zener clamped to approximately Vcc + 6V, with a series impedance of 1kQ. The driver output slew rate is limited to less than 30V/us as required by the EIA/TIA-232E and V.28 specifications. Typical slew rates are 24V/us unloaded and 10V/us loaded with 3Q and 2500pF. RS-232 Receivers EIA/TIA-232E and V.28 specifications define a voltage level greater than 3V as a logic 0, so all receivers invert. Input thresholds are set at 0.8V and 2.4V, so receivers respond to TTL level inputs as well as EIA/TIA-232E and V.28 levels. The receiver inputs withstand an input overvoltage up to +25V and provide input terminating resistors with nominai 5kQ values. The receivers implement Type 1 interpretation of the fault conditions of V.28 and EIA/TIA-232E. The receiver input hysteresis is typicaily 0.5V with a guar- anteed minimum of 0.2V. This produces clear output tran- sitions with slow-moving input signals, even with moderate amounts of noise and ringing. The receiver propagation delay is typically 60Ons and is independent of input swing direction. Low-Power Receive Mode The low-power receive-mode feature of the MAX223, MAX242, and MAX245-MAX249 puts the IC into shutdown mode, but still allows it to receive information. This is important for applications where systems are periodically awakened to look for activity. Using low-power receive mode, the system can still receive a signal that will acti- vate it on command and prepare it for communication at faster data rates. This operation conserves system power. MAX243Negative Threshold The MAX243 is pin compatible with the MAX232A, differing only in that RS-232 cable fault protection is removed on one of the two receiver inputs. This means that contro! lines such as CTS and RTS can either be driven or left floating without interrupting communication. Different cables are not needed to interface with different pieces of equipment. MAAXIAA+5V-Powered, Multi-Channel RS-232 The input threshold of the receiver without cable fault pro- tection is -0.8V rather than +1.4V. Its output goes positive only if the input is connected to a control line that is actively driven negative. If not driven, it defaults to the 0 or OK to send state. Normally, the MAX243's other receiver (+1.4V threshold) is used for the data tine (TD or RD), while the negative threshold receiver is connected to the control line (DTR, DTS, CTS, RTS, etc.). Other members of the RS-232 family implement the optional cable fault protection as specified by EIA/TIA- 232E specifications. This means a receiver output goes high whenever its input is driven negative, left floating, or shorted to ground. The high output tells the serial com- munications IC to stop sending data. To avoid this, the control lines must either be driven or connected with jumpers to an appropriate positive voltage level. ShutdownMAX222-MAX242 On the MAX222, MAX235, MAX236, MAX240, and MAX241, all receivers are disabled during shutdown. On the MAX223 and MAX242, two receivers continue to operate in a reduced power mode when the chip is in shutdown. Under these conditions, the propagation delay increases to about 2.5us for a high-to-low input transition. When in shutdown, the receiver acts as a CMOS inverter with no hysteresis. The MAX223 and MAX242 also have a receiver output enable input (EN) that allows receiver out- put control independent of SHDN. With all other devices, SHDN also disables the receiver outputs. The MAX225 provides five transmitters and five receivers, while the MAX245 provides ten receivers and eight trans- mitters. Both devices have separate receiver and trans- mitter-enable controls. The charge pumps turn off and the devices shutdown when a logic high is applied to the ENT input. In this state, the supply current drops to less than 25uA and the receivers continue to operate in a low- power receive mode. Driver outputs enter a high-imped- ance state (three-state mode). On the MAX225, all five receivers are controlled by the ENR input. On the MAX245, eight of the receiver outputs are controlled by the ENR input, while the remaining two receivers (RAS and RBS) are always active. RA1-RA4 and RB1-RB4 are put in a three-state mode when ENR is a logic high. Receiver and Transmitter Enable Control Inputs The MAX225 and MAX245-MAX249 feature transmitter and receiver enable controls. The receivers have three modes of operation: full-speed receive (normal active), three-state (disabled), and low- power receive (enabled receivers continue to function at lower data rates). The receiver enable inputs control the MAXUM Drivers/Receivers full-speed receive and three-state modes. The transmit- ters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). The transmitter enable inputs also contro! the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the low-power receive mode when in shutdown. Tables 1A-1D define the control states. The MAX244 has no control pins and is not included in these tables. The MAX246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. A logic high at the A-side control input (ENA) causes the four A-side receivers and drivers to go into a three-state mode. Similarly, the B-side contro! input (ENB) causes the four B- side drivers and receivers to go into a three-state mode. As in the MAX245, one A-side and one B-side receiver (RA5 and RB5) remain active at all times. The entire device is put into shutdown mode when both the A and B sides are dis- abled, (ENA = ENB = +5V). The MAX247 provides nine receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each contro! four receiver outputs. The ENTA and ENTB transmitter enable inputs each control four drivers. The ninth receiver (RB5) is always active. The device enters shutdown mode with a logic high on both ENTA and ENTB. The MAX248 provides eight receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs control four dri- vers each. This part does not have an always-active receiver. The device enters shutdown mode and trans- mitters go into a three-state mode with a logic high on both ENTA and ENTB. The MAX249 provides ten receivers and six drivers with four control pins. The ENRA and ENRB receiver enabie inputs each control five receiver outputs. The ENTA and ENTB transmitter enable inputs contro! three drivers each. There is no always-active receiver. The device enters shutdown mode and transmitters go into_a three- state mode with a logic high on both ENTA and ENTB. In shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kbits/s. Applications Information Figures 5 through 25 show pin configurations and typical operating circuits. In applications that are sensitive to power-supply noise, Vcc should be decoupled to ground with a capacitor of the same value as C1 and C2 con- nected as close as possible to the device. 2-99 i 6VCXVIN-OCCXVINMAX220-MAX249 +5V-Powered, Multi-Channel RS-232 2-100 ( } ARE FOR MAX222 ONLY. Drivers/Receivers | oe view SV INPUT * C3 SJ ats . cs Cte [4] ne} Voc L 4 vw [2 GND 1 2 4 mnam fe Hn c= al o* evo av vp ey Ct- [3] mayeeg ~ ft] Tour TH cr VOLTAGE DOUBLER co fa] MAX232- Bia) in 4 + MAX232A fe] Cee +10V TO -10V V. 6 -10V c2- H2] Rout C2=_1 45. VOLTAGE INVERTER | co. VOLTAGE INVERTER TL 4 v- [6 ha} Taw = T2out 7] HO} 12 ram [8] f9] R2our ps rn Tour] 14, TTLCMOS RS-232 DIP/SO INPUTS OUTPUTS it T2iN Tout] 7 CAPACITANCE (uF) r_12| stout rin| 13. DEVICE C1 C2 C3 Ca C5 TTL/CMOS as.249 MAX220 47 #47 #10 #10 47 OUTPUTS INPUTS 9} Re nan] 8 MAX232, 110 #10 10 10 10 our we MAX232A 01 01 O01 01 O01 GND i 15 | Figure 5. MAX220/232/232A Pin Configuration and Typical Operating Circuit 5V INPUT TOP VIEW . 3 ALL CAPACITORS 0 tur ul Pitt 4s + a7 2 Vec 3 1-4] +5V.10 +10V a ov TY cr. VOLTAGE DOUBLER 5 C2 7 -10V _ N77 ca 5 +10V 10 v woe (7] ia] SAN co. WOLTAGE INVERTER re Cts [2 Vec vw. [g] AAAMLAA [ 4 Manze 16) GND Ci 44 fAX242 15} 71 = Hs) our TTUCMOS AS-232 cas [5 | fal Rtg INPUTS OUTPUTS 11f Tin T2qur | 8 C2- [6] 13] Riout }> v [7] n2) Tw Tout [8 Ht] TaN ( <2] TIL/CMOS 7 Faw [9 +9] reour OUTPUTS none | 10 DIP/SO \- J Figure 6. MAX222/MAX242 Pin Configuration and Typical Operating Circuit+5V-Powered, Multi-Channel RS-232 Drivers/Receivers TOP VIEW T30UT a Tout [2 | T2out [3 MAXLAA Tan [a] MAX230 Tw [5 | GND [ | Voc ra C14 [a ve ig DIP/SO +5V INPUT Vec +8V 10 +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTEA in 1OpF = 10) 0 n T4out 1OyF zd _ T5in NC SHUTDOWN TSqur T4in "3m TILCMOS ye INPUTS c2- C2+ 400kQ2 400ko2 RS-232 OUTPUTS 6) - a SHUTDOWN Figure 7. MAX230 Pin Configuration and Typical Operating Circuit TOP VIEW To c+ a 4) Ve c- [RI 13) Voc v- [3 non 2] GNO Teout [4 | 41] Mour R2in Ho] RIN R20uT | 6 9 | Riourt T2n | 7 8 | TiN DIP c+ ] fe] vs. BL 5} voc B31 pnavaaa [4) cho Taout fa] = MAX237- hs] tow Raw [5 | f2) Rw Rout [6 14] tour Taw [7] ho! Tn NC [a NC so 45V INPUT s75VT0 12 1.0uF 2 4 (15) 7 = c Voc ye E41 08) mn TAC. +12V TO -12V VOLTAGE CONVERTER c2 1 OuF 2 TIL/CMOS | RS-232 INPUTS | OUTPUTS TTL/CMOS 2 OUTPUTS INPUS GND PIN NUMBERS IN (_} ARE FOR SO PACKAGE Dig Figure 8. MAX230 Pin Configurations and Typical Operating Circuit MAXIMA 6PCXVN-OCCXVN 2-101MAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers TOP VIEW . Taw [A 20] Rout THN (2 | 191 R2IN a OUT (3 | MA 18] T2out nin [a] Max233 a7] v- MAX233A T1OUT [5 | 6] C2- GN [6 | 5] 02s vec [7 | 4) vier) waci+ [e | 13] C1-(C1s) GND [9 | 2] v- (C24) | 4 (V-)C2- [10 Hi] C24 (C2-) DIP/SO (.) ARE FOR SO PACKAGE ONLY TTL/CMOS INPUTS 7 pad TILCMOS K 2 1 OUTPUTS 0 OO NOT MAKE ; 8413) C1+ C2+ CONNECTION TO { 14 THEse PINS (349 cy. oo. 12(10 C INTERNAL -10V [17] v 2 POWER SUPPLY | L17] y 02. INTERNAL +10V 14.(8) POWER SUPPLY Va GND GND 20) R2out = ~] : 5k +5V INPUT Rtourt RIN : 5k R2in {7 +5V Voc 400k Tin > Mout [50 +5V 400k Tein Teout | 18 an RS-232 1 QUTPUTS 4 |4 | RS-232 INPUTS 9 | }< ay (12) 15) 16 [von Figure 9. MAX233/MAX233A Pin Configuration and Typical Operating Circuit +5V INPUT TOP VIEW Et = 6 = 1.0uF 4 cts vit 10V wh 1OnF AS 9 PAGE DO Ct VOLTAGE DOUBLER 0 C2+ ovTo 12 EE +10V 10 -10V SL TOuF = 11 VOLTAGE INVERTER VP Trout [+] * he! Tour co WOMTAGEINE re (Ou T2out [2] 15] Toyt : T2N "a | AAAXKLAA |] Tan TAN [4] MAX234 h3| T3iN GND A ha] y- vec [6 Mikes Re fe Tout] 3 Cit] 7 0 a po] cas TTLCMOS { RS-232 vs [a] [9] cr- INPUTS } OUTPUTS | DIP/SO "3 14] 14 T4our | 15 IN i> our J GNO 5 Figure 10. MAX234 Pin Configuration and Typical Operating Circuit 2-102 MAAXASA+5V-Powered, Multi-Channel RS-232 Drivers/Receivers TOP VIEW ENR [1] Vec ene [| Vec TIN [3] ENT TN [al Anaxiaa [25] tN ROUT [Ss] MAX225 TalN ROUT [| TsIN ROUT [7] RAOUT Ras [| RsQUT Ran [| RIN AlN [ig RaiN TOUT [ay T30UT TOUT [19 TQUT GND [14 T;0UT GNO [14 [35] Ts0ur so MAX225 Functional Description 5 Receivers 5 Transmitters 2 Control Pins 1 Receiver Enable (ENR) 1 Transmitter Enable (ENT) PINS (ENR, GND, Vcc, TSOUT) ARE INTERNALLY CONNECTED. CONNECT EITHER OR BOTH EXTERNALLY. TsOUT IS A SINGLE DRIVER. 400k 3 TIN > 11 +5V TOUT 400k 4 TaN 1? +5V T20UT 400k 25 T3IN 4 > 18 +5V T30UT a , - TAIN . 4m +5V TOUT v Sam TsOUT 23 ef} GIN _ pe > 16 > ENT ~ 26 > TouT > 15 5 RyOUT - RiIN 10 5 ROUT = RalN 9 5k q a RgQUT = Rall <3 5k q 20 RAQUT = RalN 19 q 1 ReQUT = ReIN <2 1] ENR 4 = o 27 ENR GND GND 13{ 14 60CXVIN-OCCXVWN Figure 11. MAX225 Pin Configuration and Typical Operating Circuit MAAXLIM 2-103MAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers 5V INPUT TOP VIEW ary 5h? +5V Vcc 400k 8] Tin lid> Tour $3 f +5V 400k , 7] T2n {> T2out +5V v 15] 13) Zam T3 2 a TTL/CMOS IN {> our RS-232 e Tour [7 | [24] Ron INPUTS 5V OUTPUTS | 400k T30ut [2 | 23] R3qur 16 F Tan fi> T4our [1 Tour [3 | 22} T50 +N T2out [4] AAARLAA Zan 4) axes [2] sturoown 224 151 > Tour | 19 Raw [5 | 20] EN 9 97 Ri Rtn fF Reout [6 | 9] Tour ou }+ | Tan [7] 18] Ran ok Tw [3 7, Rour 8} Reout al = Ran [5 Alout [a] 16] TAIN 4 5k Rin 10 15) T3in bo mB TTL/CMOS 23} R3qur Zi] = Ran 24 RS-232 GND [14] 114] RSour OUTPUTS fa Nevis v 7 5k cc 12 3} RSIN 1TE Ra = pain | 18 DIP oe ha os bk | [ 14] RSout <1 = Ron | ts } ~ | 5k 20] EN z sHpn [21 GND = 1 Figure 12. MAX235 Pin Configuration and Typical Operating Circuit 2-104 PRAAXASA+5V-Powered, Multi-Channel RS-232 Drivers/Receivers +5V INPUT TOP VIEW "Oye 3 4 : = 9 1.0uF 10 Vee Woe ou eo +5V 10 H10V Ve 1OuF 7 12 ct. VOLTAGE DOUBLER 13 tour) +10V T0-10V vb MPS 14] ao. VOLTAGE INVERTER TT tour tr +5V| 7 I 400k es Tour [1 24] Taur ? Toor [2 [23] Raw oy 1 400k our [3 | Max 22] Reout 6} T2N [Be Tour] 3 Riw [ay yoae 21] SHUTDOWN _ TTLCMOS BS 232 Rtout [5 | 20] EN INPUTS OUTPUTS Taw [6 | a] Taw Tw [7] 18] T3IN GND [| 17] R3ouT Vec [9| 16] R3n C1+ fio| 15] V- 5] Rlour <a Rinf4 x ve [1] 2. zs | . cr fal +3} 02s = 23 | RS-232 rye a) Bea DIP/SO 16 a Figure 13. MAX236 Pin Configuration and Typical Operating Circuit MA AXIMA 2-105 6VCXVN-OccXVWMAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers TOP VIEW e 7 t Tout (4 | 24] Tout Trout [2 | 123) Row T2our [3 | 22] Reour Rin [| none 21) T51y Rout [5 | 120] tSour T2in fe 19] T4In Taw [7 18} T3in GND [| 7] R3qur vec [9] 6] R3iNn ot fil ial v vs [1] 14) 2- cr fa 113) 2s DIP/SO +5V INPUT 1. Our a 2 Ls oye Lo Vec vu PLP tour ap) +5V 70 +10V . THE oy. VOLTAGE DOUBLER 13 1 uF 5, Ces +10V T0 -10V y PE TT oo. VOLTAGE INVERTER L toy E +5 = 400k 71 Tw : lide Trout | 2 +5V | 5 en T2n {i> T2out 43 +5V zn TTL/CMOS 18] 13mg 3 T3our 1 AS-232 INPUTS 45V OUTPUTS 400k | 19] TaN [> Tout | 24 i +5V 400k 204 T5in TS5out | 20. 5] Rtour 4 Riw [4 es TrLcmos | _ 22] R2our = Ram] 23. | RS-232 OUTPUTS J <f |} INPUTS 5k 17] R3our <@L R3in | 16 Figure 14, MAX237 Pin Configuration and Typical Operating Circuit 2-106 MAAXLAA+5V-Powered, Multi-Channel RS-232 Drivers/Receivers TOPVIEW we +5V INPUT < Def ____ = 9 >< 10 Vcc Ww fF 1 Out sort +5VT0-+10V Ve ND OF 2h VOLTAGE DOUBLER N 13 VOMFES 14 o VOLTAGE INVERTER v- ee TAT ce. EF = +5V = a e 400k T20uT | 1 J24) T30ur ce Sf tin Tour | 2 > Tout | 2 23) ASN | +6V ND 400k Raw [3 | 22) R3our ee Teour 44 SS ental ape Ba 5 P TTL/CMOS AS-232 Tw (5 20} t4qut INPUTS 400k OUTPUTS Rout [6 | 9] T3n fd Rim [7 | 18) 126 Vec [9] ii6] RAIN Cl+ [10] 15] V- vs fi] a] c2- Ct (2 13} C+ DIPISO TTUCMOS AS-292 OUTPUTS \ INPUTS Figure 18. MAX238 Pin Configuration and Typical Operating Circuit PRAAXIAA 2-107MAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers V- 13.2 TOP VIEW - +5V INPUT Ne UT Oy =! . I: V+ | 10V 10 +10V ve VOU AS TT oleh Si 104F +5V - 290 24 | Tin > Tiout +5V a 400k e Rtour (11 | 24] 11 TIL/CMOS 23 [T2N : f2> Teout rw [2] 3) tow INPUTS eV OUTPUTS 400k Gno [3] 22) zou 16 | Tan z T3out PAAXLAR 3 veo [a] i hon > MAX239 V+ [5] 20] T20uT 1H Rtour i Run C+ [6 19] Tout 5k c- (7 +8] Ram v [al 17] R30ur ao 2 | Rout <e ee RIN [9] 6] T3iN 5k Pout fro is] no. AS-232 1 = Rourt [r7] Ha] BN TMS fg 7A Raout RON | TO} INPUTS Raw 12 | 13] Taout 5k DIP/SO 11 | Rour fa = Raw i, By] 10 J Rout <q SIN 4 5k a Z NC 5 GND = 3 Figure 16. MAX239 Pin Configuration and Typical Operating Circuit 2-108 PAMXALA+5V-Powered, Multi-Channel RS-232 Drivers/Receivers +5 INPUT TOP VIEW 1 OuF Pe 25 Vec a sour | +5V 0 410V Ve OuF 27 Cr VOLTAGE DOUBLER ares tty +5V TO -10V 30 10pF + 2g | oo VOLTAGE INVERTER VT one - MM tt +5V = 400K82 (-* Tw {i> Tour}? 14 a +5V 400KQ2 TTL/CMOS 37 | T3in T3aur | 6 AS-232 NeUTS < n 3 + OUTPUTS = an 38 T4in {ite Tdout | 5 +5V = we 27 T5in {Boe T5our | 41 | MAX240 a5] Riour o<fi Rin | 17 4 5k 13 1 Rout < fo Raw | 10 _ 7 zs TTLCMOS 3 f R30ur = Ran] 4 RS-232 OUTPUTS { + R3 Mos 7 INPUTS | J PLASTIC FP _ zs i 397 R4ourt <A = Raw | 40 | + 3s 36 | R5our aS = Rin f 35 > 5k 42] EN sHoN | GND = LL 18 Figure 17, MAX240 Pin Configuration and Typical Operating Circuit MAAXLMA i 6hcoXVN-OZCXVNN 2-109MAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers TOP VIEW Taout [4 | Tlout T2ouT [3] R2IN [a | Rout [5 | Taw [6 | thw 17 | Rout RIN [9] GND Vcc C14 fra| vs [13] Ct MAAMYARA MAX241 MAX223 26} 7 6] 5; 24] 23] 23| a 20} ha] a] FI 8] 1 WIDE SO SSOP Toyt R3IN RSqut SHDN (SHDN) EN (EN) Rain R4out T4IN T3iN RSout* ASIN" Ve C2- C2+ * R4 AND RS IN MAX223 REMAIN ACTIVE IN SHUTDOWN NOTE: PINLABELSIN{ ) ARE FOR MAX241 +5V INPUT Dre = " out iH Vcc y 137 1.0uF =, * +5V TO +10V * TT cr VOLTAGE DOUBLER 15 Eq oe +10V TO -10V v2 TOF 7S 46 2 VOLTAGE INVERTER LL . Tr +5V = 400kQ rp ftw [i> Ttour } 2 TTL/CMOS | INPUTS +5Vi 400K2 T4In 2 L a1 7 T4out | 28 J ( 8] Rlourt fil RAIN fy a 5) Rout -<l a a LOGIC } 269 R3our = Ran | 27 OUTPUTS \ 4 5k = 23 22] Rout Ra ~ Ran 23 19] Roour = RSin | 18 \ at fw > 24 EN(EN) SHON | GND = (SHDN) tw \ RS-232 OUTPUTS RS-232 INPUTS Figure 18. MAX241, MAX223 Pin Configuration and Typical Operating Circuit 2-119 MRAAKLSA+5V-Powered, Multi-Channel RS-232 os s Drivers/Receivers TOP VIEW 1M vv INPUT a tap ALE GAPACITORS 0 thF Dr sf = 16 1 Vec 2 1 Ov our | & 45V TO H10V ve TS C1 VOLTAGE DOUBLER NZ > C2+ - 6 | Ct I +10V 70 -10V 10V GO 16; vec OtMF = 5] = VOLTAGEINVERTER = FL tye ve [2] [15} GND a = cr [al AaanAA tial Tor om. C2+ 4 3) Ati 1] Th : or Tout] 14 C2- 5 Rout TIVeMOS +5V a 46-239 v- [6] 14) TN WS we , OUTPUTS 7 Tout FI 10) T2IN J Zour? R2IN [a] 9] R2our DIP/SO 2] Rout Rin | 13 _ TTLCMOS 5 aS OUTPUTS ae 4 R2out = Ran] 8 zs GNO i LS Figure 19. MAX243 Pin Configuration and Typical Operating Circuit MAXUM 2414 i 6PoXVW-OCCXVUINMAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers RaalN TOP VIEW ca [| RasiN Js | TasOUT | o | Ta30UT [ro | TAZOUT @ [= | Tai0UT Ec | & | Te2QUT PS ] Te30UT [= | TeaOUT S| RasiN Ra3lN [7] RAN 8 | RailN | 9 Rai OUT | 10 Ra2OuT [14 MAAXLMA MAX244 RAIOUT [12 | RaaOUT [13 | RasQUT [14 | TAIN (45 | Taal (16 | Taal [417 | [39 | Real [3a | Resin [37 | RezlN [36 | RBiIN 35 | ReiOUT 34 | Re2QUT 33 ] Rex0UT 32 ] ApeOUT 31 | ResOUT 39] TeilN 29 | Taal r [21] fee| 23 i [os 26| {27 \28 > vec [S| C1+ V+ N 3 C2+ & TaalN [= | GND [S|] TpalN TB3iN PLCC MAX244 Functional Description 10 Receivers Always Active 5 A-Side Receivers 5 B-Side Receivers 8 Transmitters 4 A-Side Transmitters 4 B-Side Transmitters No Control Pins +5V wk thr 21 = | 20 iprtL 93 | C1 Vee 22 IF ct +5V TO +10V VOLTAGE DOUBLER ve ee cane T_23| C2- +10V TO -10V VOLTAGE INVERTER V- T IpF __1 | TarOUT +5V 45V - Tgi0uT | 44= : 400k 15. | TAIN Tei IN| 30 2 | Ta2QUT +5V045V Tp20UT | 43 4 e - 400k 16 | Ta2lN TpalN | 29 3,| TasOUT +8V 0 45V Tp30UT | 42 a $o< Se ~ 400k 17 | TagiN TaglN | 28 4| TasOUT +5V 0 +5V Tp4OUT : 41 HY > a > 400k 1B} TaalN TpalN | 27 g | Rain a ReilN | 36 5k 3 5k 10| RaQUT = = Rei OUT | 35 8 | Ra2IN =< RaalN | 37 | 5k : 5k 11] RazOUT = = Re20UT | 34 7} RaaiN > Ragin | 38 5k 5k 12 | RagQUT = = Rg30UT | 33 6 | RaalN RpalN | 39 2 a 5k 5k 13 | RagQUT = == ReaQUT | 32 5 | Ragin Resin | 40 at > noe ty Sk 5k L i 14| RasOUT = GND = ResOUT | 31 : 19 Figure 20. MAX244 Pin Configuration and Typical Operating Circuit 2-112 PAAXIIM+5V-Powered, Multi-Channel RS-232 Drivers/Receivers TOP VIEW ll ENR [2 | lao} Vcc Tailn [2 | 39] ENT Tan [3 | [38] TeitN Tran [| f37] TeaiN Taal [5 | 36] Te3IN AasOUT [6 | 35] Teal RagQuT [7] faa} RasOUT Ra3QUT [a] PAAXIAA 33} ReaQUt rwout [9] MAX245 fae] Resour aniour [10] 31] Re20UT RailN fra] 30] RaOUT Ral [12] [za] Rein Raallv [13 | [28] Ae2IN Radin {us| 27] ResiN RasiN [15 [26] RealN TarOUT [16] '25] Resin Taz0UT [17] fea) TexOUT Ta30UT [1a j23] Te20UT TaOUT [19| 22] Te30UT GND [20] fat] TeaOUT DIP MAX245 Functional Description 10 Receivers 5 A-Side Receivers (Ras always active) 5 B-Side Receivers (Rg5 always active) 8 Transmitters 4 A-Side Transmitters 4 B-Side Transmitters 2 Control Pins 1 Receiver Enable (ENR) 1 Transmitter Enable (ENT) +5V 1pF Lt [lw Vcc 16 | TaxOUT +N 45V Tei0UT | 24 400k 2| TAIN z : TaiiN, 38 17 | TazOuT < +5V +5V Tp20UT | 23 7 400k 3| Ta2lN Tp2iN | 37 18} Ta30UT Reh +4 4 Tea0UT | 22 400k th 4| Tagit Ta3iN | 36 19] TasOUT SV SV TgaQUT | 21 onl 400k _ 5) TaalN TpalN | 35 1| ENR ENT | 39 ee __11 | RailN I RaiiN |g 5k 5k 10| RaiOUT = = ___ApiQuT | 30 12| RaztN RealN | 28 -_+ {#_ 5k 5k 9| RazQUT = Re20UT | 31 Lo eee, 13) Ragin N RealN | 27 | 5k 5k 8| Ras3QUT = = ResOUT] 32 _. 14] Raaln RaalN | 26 __ -_ 5k 5k 7) RaOUT = = RpQUT | 33 15 | RasiN > Resin | 25 <\* +4 5k : 5k 6| RasOUT = = ResOUT | 34 GND 1 6rCXVN-OCCXVN Figure 21. MAX245 Pin Configuration and Typical Operating Circuit MAAXIMMA 2-113MAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers +5V tr TOP VIEW F | Vec Vv 16 | Tar0uT sv 48V Dee a Ena (1 | 3 400k : TaN [2] 2| TailN TeiIN | 38 Ta [| 17 | Ta20uT +5V 45 T20UT | 23 TagiN [a 400k Taal (5 | 3 | Taal TaziN | 37 rssour [6 | RaaOUT ea 18 | Ta3OUT +5V + 5V Ta30UT | 22 400k Raut [8] Am Arciaa [23] Pa0UT 4| TaslN : : las TaalN | 36 RaOUT [9] MAX246 Rai0UT [10] 19 | TMOUT wv BV TedOuT | 21 RatlN [17 Ik Ravin fiz! 5 | TaalN ah z 400 : TaalN | 35 Ragin [13 1 ENA ENB | 39 Raat [i | RaylN RettN | 29 asin [15 TarOUT [76 30 TOUT [17 | 28 Tag0UT [re TaOuT [19] a GND eo ar OO DIP 32 MAX246 Functional Description 26 10 Receivers 5k 5 A-Side Receivers (Ras always active) = peut 33 5 B-Side Receivers (RB5 always active) : 15 | RasiN a 8 Transmitters . 4 A-Side Transmitters 5k 5k 4 B-Side Transmitters 6] RasOUT = GNo = _RasOUT | 34 2 Control Pins Enable A-Side (ENA) Enable B-Side (ENB) Figure 22. MAX246 Pin Configuration and Typical Operating Circuit 2-114 PAAXILSA+5V-Powered, Multi-Channel RS-232 a a= Drivers/Receivers +5V uF TOP VIEW fl, _ Vec ENTB | 39 +5V +5V TBrOUT | 24 enta [1] ja0) vec 30m = Sy Tan [2 39] ENTE TaN TeiIN | 38 TaN La 38} Teun Ta20UT BV 48V Ta20UT | 23 Tain [4 [37] Te2lN sh 3 os | TaalN a6] TasIN TagiN | Taatt | 37 ResOUT [6 TpalN RaaOUT [7 | [34} ResOUT Ras0UT [8 | gare Aa [29] Rex0UT razouT [9 | MAX247 Re20UT RaiGUT [10] 31] Rei0UT ENRA (11 | 130] ENRB RailN [x2 lea] ReiiN RagIN bs] 2a) Razin Ragin [14 | Real RaalN [5 | 26| RealN TaiOUT [16| f25| ReslN Ta20UT [17] fea) TarOUT TagOUT fra | 23] Te20UT TaOUT fra] 22] Tes0UT GND [eo [21] TaOUT pip MAX247 Functional Description 9 Receivers 4 A-Side Receivers 5 B-Side Receivers (Regs always active) 8 Transmitters 4 A-Side Transmitters 4 B-Side Transmitters 4 Control Pins Enable Receiver A-Side (ENRA) Enable Receiver B-Side (ENRB) Enable Transmitter A-Side (ENTA) Enable Transmitter B-Side (ENTB) Ta30UT +OV 45 Te30UT | 22 400k Ta3lIN | TpglN | 36 2 17 3 18 4 19 Ol as +5V wy TeaQUT | 21 400k 5 | Taal TealN | 35 ~_1) 6 ResQUT ResIN | 25 ~<] 5k = | 12] RaiiN x ReilN | 29 }-_ $4 5k 5k 10 | RarOUT = = ReiQUTy 31 13) Razin < RealN | 28 -} : 5k 5k 9| ROUT = | = _Ag20uT | 32 14 { RaglN NS SS RpalN | 27 5k : 5k a} Ra0UT = = Rp30UT 15 | RaglN x ReaiN ~ HS 5k 5k 7| BMOUT = == Rp4OUT 11} ENRA ENRB GND * Figure 23. MAX247 Pin Configuration and Typical Operating Circuit PAAXUMA 2-115 6r~ZXVNW-OccXUWMAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers +5V ww IF = 20 a TOP VIEW =o] Cle Voc ve [2 yr a3 + a C1- +5V TO +10V VOLTAGE DOUBLER 06 co 02+ yeLe zze 3 2 3 3 2 2 Zz WPS 25 C2- +10V TO -10V VOLTAGE INVERTER try =a + zs = - & 2 = - +> @2@f2f2 282 #@a3 18| ENTA ENTB| 27 = 5 43) 42| |4 SV 45V fe Hf] 4} 9] [2] [| fl fe! fot fool AL Tar OUT + * TeiQUT | 44 e 3 400k tN 1 aul (7 8] RealN 14] TailN 31 RaiiN 4 Ec | t0UT 5V45V Te20UT} 43 ENRA 37 | RexiN ) [ our a ENB re 400k oy RaOUT [40 MAXIM 36 | 15) Tall Tea | 30 RaOUT (14 | MAX248 [35 | Re:OUT RagOUT [72 | [3a] Rez0UT 3) Tag0UT SV +5V Tes0UT | 42 RaaOUT (13 | a3} Re30UT a, 00k Taal [14 | 32 | ResOUT 16) Tasin Te3iN | 29 TratN [15 [31] TBuN Tain (a 30] Tain 4| TaaQUT +V 45V TgaQUT | 41 Taal [47 | 29 | Ta3IN i 400k 17] Taal L TpalN | 28 hal 19 20 [24 ja 23 24} 25] le j27| [a8 ZS s*sogsrles 8] RailN Ld Rei!N | 37 ire) Le PLCC MAX248 Functional Description 8 Receivers 4 A-Side Receivers 4 B-Side Receivers 8 Transmitters 4 A-Side Transmitters 5| RaaiN 4 B-Side Transmitters +k 4 Control Pins Enable Receiver A-Side (ENRA) 13] RUT [327 Enable Receiver B-Side (ENRB) . g| ENRA ENRB | 36 Enable Transmitter A-Side (ENTA) GNO Enable Transmitter B-Side (ENTB) [19 Figure 24. MAX248 Pin Configuration and Typical Operating Circuit 2-116 MAAXISA+5V-Powered, Multi-Channel RS-232 Drivers/Receivers +5V 1pF tpe TOP VIEW so Ct Voc 22 WES alo. +5VT0 +10V VOLTAGE DOUBLER Ve 24 26 4 V- WES 25 | +10V TO -10V VOLTAGE INVERTER tyr, zzz BEBBBBezz Ge =|, + 2226885882 T ENTB| 27 2222222282 28 a 1} TA1OUT +5V 0 +5V Tai0UT | 44 fe Lys es] fo if etl Heel asl oo] fa] fag] ; 400k Ms 15] TailN TpilN | 30 Radin [7 | [ag] ReaiN RAIN (e] 38 | RealN 2| Ta2OUT +5V +8V Ta2QUT | 43 Enaa (| Ra oe veut 2 maura MAXIM [a6] ENRE 16) Tain + sa MAX249 RaaOUT | 14 }35.] Rex0UT 3! TagOUT BV 48V Taa0UT | 42 RagOUT (42 | 34 | Ra2OUT RadOUT [13] 2a] Fes0uT 17} TasN om Taalh | 28 RasOUT [14 | [32] As<OuT - TatlN [45] a1] ResOUT 8 | RarIN ABtIN | 37 TaalN (36 | 30} TerIN 5 +k Taaln L17 [20] Tealn tol rout = ~ pg our| 35 Teel ele Tele ENTA ia | e a27+ 47 + we FZ8s75ags> PLCC MAX249 Functional Description 10 Receivers 5 A-Side Receivers 5 B-Side Receivers 6 Transmitters 3 A-Side Transmitters 3 B-Side Transmitters 4 Control Pins Enable Receiver A-Side (ENRA) Enable Receiver B-Side (ENRB) Enabie Transmitter A-Side (ENTA N { Enable Transmitter B-Side (ENTB Ente (8 | Te3in [3B | ) ) 28 k 7} RaalN _ 5k Ra20UT 6| Ra 12| RagOUT IN 5k RaalN RaaQUT RegOUT 4] RasiN 4 5k 14( RasOUT = ResIN g| ENRA GND {* Figure 25. MAX249 Pin Configuration and Typical Operating Circuit MAAXILMA 6PCXVW-OCCXUWN | 2-117MAX220-MAX249 +5V-Powered, Multi-Channel RS-232 = a Drivers/Receivers Ordering Information (continued) PART TEMP. RANGE PIN-PACKAGE MAX232AC/D 0C to +70C Dice* MAX222CPN OC to +70C 18 Plastic DIP MAX232AEPE -40C to +85C 16 Plastic DIP MAX222CWN OC to +70C 18 Wide SO MAX232AESE -40C to +85C 16 Plastic SO MAX222C/D OC to +70C Dice* MAX232AEWE _-40C to +85C 18 Wide SO MAX222EPN -40C to +85C 18 Plastic DIP MAX232AEJE -40C to +85C 16 CERDIP MAX222EWN -40C to +85C 18 Wide SO MAX232AMJE --S5C to +125C 16. CERDIP MAX222EJN -40C to +85C 18 CERDIP MAX232AMLP - -55C to +125C = 20 LCC MAX222MJN -55C to +125C - 18 CERDIP MAX233CPP OC to +70C 20 Plastic DIP MAX223CAI OC to +70C 28 SSOP MAX233EPP -40C to +85C 20 Plastic DIP MAX223CWl OC to +70C 28 Wide SO MAX233ACPP 0C to +70C 20 Plastic DIP MAX223C/D C to +70C Dice* MAX233ACWP 0C to +70C 20 Wide SO MAX223EAl -40C to +85C 28 SSOP MAX233AEPP -40C to +85C 20 Plastic DIP MAX223EW -40C to +85C 28 Wide SO MAX233AEWP _-40C to +85C 20 Wide SO MAX225CWI OC to +70C 28 Wide SO MAX234CPE 0C to +70C 16 Plastic DIP MAX225EW! -40C to +85C 28 Wide SO MAX234CWE OC to +70C 16 Wide SO MAX230CPP OC to +70C 20 Plastic DIP MAX234C/D 0C to +70C Dice* MAX230CWP OC to +70C 20 Wide SO MAX234EPE -40C to +85C 16 Plastic DIP MAX230C/D OC to +70C Dice* MAX234EWE -40C to +85C 16 Wide SO MAX230EPP -40C to +85C 20 Wide SO MAX234EJE -40C to +85C 16 CERDIP MAX230EWP -40C to +85C 20 Wide SO MAX234MJP -55C to +125C 16 CERDIP MAX230EJP ~40C to +85C 20 CERDIP MAX235CPG C to +70C 24 Wide Plastic DIP MAX230MJP 55C to +125C 20 CERDIP MAX235EPG -40C to +85C 24 Wide Plastic DIP MAX231CPD 0C to +70C 14 Plastic DIP MAX235EDG -40C to +85C 24 Ceramic SB MAX231CWE OC to +70C 16 Wide SO MAX235MDG -55C to+125C - 24 Ceramic SB MAX231CJUD OC to +70C 14 CERDIP MAX236CNG C to +70C 24 Narrow Plastic DIP MAX231C/D OC to +70C Dice* MAX236CEG OC to +70C 24 Wide SO MAX231EPD -40C to +85C 14 Plastic DIP MAX236C/D OC to +70C Dice* MAX231EWE ~40C to +85C 16 Wide SO MAX236ENG -40C to +85C 24 Narrow Plastic DIP MAX231EJD -40C to +85C 14 CERDIP MAX236EWG -40C to +85C 24 Wide SO MAX231MJD 295C to +125C 14 CERDIP MAX236ERG -40C to +85C 24 Narrow CERDIP MAX232CPE 0C to +70C 16 Plastic DIP MAX236MRG -55C to +125C 24 CERDIP MAX232CSE OC to +70C 16 Narrow SO MAX237CNG OC to +70C 24 Narrow Plastic DIP MAX232CWE OC to +70C 16 Wide SO MAX237CEG 0C to +70C 24 Wide SO MAX232C/D OPC to +70C Dice" MAX237C/D OC to +70C Dice* MAX232EPE ~40C to +85C 16 Plastic DIP MAX237ENG -40C to +85C 24 Narrow Plastic DIP MAX232ESE ~40C to +85C 16 Narrow SO MAX237EWG -40C to +85C 24 Wide SO MAX232EWE __-A0C to +85C___18 Wide SO MAX237ERG --40C to +85C_24 Narrow CEROIP MAX232EJE ~A0C 10 485C __16 CEADIP MAX237MRG 55C to+125C_ 24 CERDIP MAX232MJE *SBPC to +125"C____16 CERDIP MAX238CNG OCto+70C __-24 Narrow Plastic DIP MAX232MLP -55C to +125C 20 LCC MAX238CEG 0C to +70C 24 Wide SO MAX232ACPE OC ta +70C 16 Plastic DIP MAX238C/D OC to +70C Dice MAX232ACSE____OC to +70" __16. Narrow SO MAX238ENG __-40C to +85C 24 Narrow Plastic DIP MAX232ACWE OC to +70C 16 Wide SO Contact factory for dice specifications. 2-118 MAXIMA+5V-Powered, Multi-Channel RS-232 6VCXVIN-OCCXVW a a Drivers/Receivers Ordering Information (continued) PART TEMP. RANGE PIN-PACKAGE MAX243CPE 0C to +70C 16 Plastic DIP MAX238EWG -40C to +85C 24 Wide SO MAX243CSE 0C to +70C 16 Narrow SO MAX238ERG -40C to +85C 24 CERDIP MAX243CWE OC to +70C 16 Wide SO MAX238MRG -55C to +125C 24 CERDIP MAX243C/D OC to +70C Dice* MAX239CNG 0C to +70C 24 Narrow Plastic DIP MAX243EPE -40C to +85C 16 Plastic DIP MAX239CEG OC to +70C 24 Wide SO MAX243ESE ~40C to +85C 16 Narrow SO MAX239C/D OC to +70C Dice* MAX243EWE -40C to +85C 16 Wide SO MAX239ENG -40C to +85C 24 Narrow Plastic DIP MAX243EJE -40C to +85C 16 CERDIP MAX23SEWG -40C to +85C 24 Wide SO MAX243MRG -55C to +125C 16 CERDIP MAX239ERG -40C to +85C 24 Narrow CERDIP MAX244CQH OC to +70C 44 PLCC MAX239MRG -55C to+125C 24 CERDIP MAX244C/0 OC to +70C Dice* MAX240CMH OC to +70C 44 Plastic FP MAX244EQH -40C to +85C 44 PLCC MAX240C/D 0C to +70C Dice* MAX245CPL OC to +70C 40 Plastic DIP MAX241CAl OC to +70C 28 SSOP MAX245C/D OC to +70C Dice* MAX241CWI 0C to +70C 28 Wide SO MAX245EPE -40C to +85C 40 Plastic DIP MAX241C/D OC to +70C Dice* MAX246CPL 0C to +70C 40 Piastic DIP MAX241EAl -40C to +85C 28 SSOP MAX246C/D 0C to +70C Dice* MAX241EWI ~A0C to +85C 28 Wide SO MAX246EPE -40C to +85C 40 Plastic DIP MAX242CPN OC to +70C 18 Plastic DIP MAX247CPL OC to +70C 40 Plastic DIP MAX242CWN OC to +70C 18 Wide SO MAX247C/D C to +70C Dice* MAX242C/D OC to +70C Dice* MAX247EPL -40C to +85C 40 Plastic DIP MAX242EPN -40C to +85C 18 Plastic DIP MAX248CQH 0C to +70C 44 PLCC MAX242EWN -40C to +85C 18 Wide SO MAX248C/D C to +70C Dice* MAX242EJUN -40C to +85C 18 CERDIP MAX248EQH -40C to +85C 44 PLCC MAX242MJN -55C to +125C 18 CERDIP MAX249CQH OC to +70C 44 PLCC MAX249EQH -40C to +85C 44 PLCC MAAXKLAA *Contact factory for dice specifications. 2-119MAX220-MAX249 +5V-Powered, Multi-Channel RS-232 Drivers/Receivers Chip Topographies Vcc GNO Tiour Aim a0" (3.048mm| = | fer ~ Toour Raw | MAX231, MAX232 and MAX233 SHDN (MAX222/MAX242) V+ Ct+ EN Vcc GND \ mane) anase iTtouT 0.105 R2in R2out = T2in (2.667 mm) Tigut T4gur A3our SHUTOOWN 0.151" (3.84 mm Rlw | 0138" I (3.51 mm} : MAX230 and MAX234-239, MAX240, MAX24 SHUTDOWN PIN OF MAX234, MAX237, MAX238, MAX239, MAX240 AND MAX241 ARE INTERNALLY CONNECTED TO GROUND TROUT Ta2OUT Tp30UT TpagOUuT Resin ; = fs 5 feels te mT] He _ 0.167" Ra20UT {4.24 mm) Ra30OUT Hy RagOUT ha RasOUT bebe oe i rar . 0.070" _ al (1.778 mm) 0.152 MAX220/222/232 A/23:3A/242/243 {3.86 mm) CONNECT SUBSTRATE TO V+ MAX 244/245/246/247/248/249 2-120 MAAXIMA