19-1592; Rev 2; 5/01 1, Low-Voltage, Single-Supply SPDT Analog Switches The MAX4624/MAX4625 are pin compatible with the MAX4544 and are available in space-saving standard 6-pin SOT23 packages, as well as the 1.0mm high Thin SOT package. Features Low RON 1 max (+5V Supply) 2 max (+3V Supply) 0.12 max RON Flatness (+5V Supply) Overcurrent Protection +1.8V to +5.5V Single-Supply Operation Available in SOT23 Packages Fast Switching: tON = 50ns max, tOFF = 50ns max TTL-Logic Compatible (+5V Supply) Pin Compatible with MAX4544 Guaranteed Break-Before-Make (MAX4624) Guaranteed Make-Before-Break (MAX4625) Ordering Information Applications Power Routing Battery-Operated Equipment Audio and Video Signal Routing Low-Voltage Data-Acquisition Systems Communications Circuits PCMCIA Cards Cellular Phones Modems Hard Drives PART TEMP. RANGE PINPACKAGE TOP MARK MAX4624EUT-T -40C to +85C -40C to +85C -40C to +85C -40C to +85C 6 SOT23-6 6 SOT23-6* 6 SOT23-6 6 SOT23-6* AADL AAAE AADM AAAF MAX4624EZT-T MAX4625EUT-T MAX4625EZT-T *Thin SOT (1.0mm height) package. Recommended for new designs. Pin Configuration/ Functional Diagram/Truth Table TOP VIEW MAX4624/MAX4625 IN 1 6 NO V+ 2 5 COM GND 3 4 NC SOT23-6 LOGIC NC NO 0 1 ON OFF OFF ON SWITCHES SHOWN FOR LOGIC "0" INPUT ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 1 MAX4624/MAX4625 General Description The MAX4624/MAX4625 are low-on-resistance, lowvoltage single-pole/double-throw (SPDT) analog switches that operate from a single +1.8V to +5.5V supply. The MAX4624 has break-before-make switching; the MAX4625 has make-before-break switching. These devices also have fast switching speeds (tON = 50ns max, tOFF = 50ns max). When powered from a +5V supply, the MAX4624/ MAX4625 offer 1 max on-resistance (RON), with 0.12 max R ON matching and flatness. The digital logic inputs are TTL compatible when using a single +5V supply. These switches also feature overcurrent protection to prevent damage from short circuits and excessive loads. MAX4624/MAX4625 1, Low-Voltage, Single-Supply SPDT Analog Switches ABSOLUTE MAXIMUM RATINGS Voltages Referenced to GND V+, IN ....................................................................-0.3V to +6V COM, NC, NO (Note 1)..............................-0.3V to (V+ + 0.3V) Continuous Current NO, NC to COM..............................200mA Peak Current NO, NC to COM (pulsed at 1ms, 10% duty cycle max) ........................ 400mA Continuous Power Dissipation 6-Pin SOT23 (derate 7.1mW/C above +70C).............571mW 6-Pin Thin SOT23 (derate 6.25mW/C above +70C) ...500mW Operating Temperature Range MAX462_E_T ....................................................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Note 1: Signals on NC, NO, and COM exceeding V+ or GND are clamped by internal diodes. 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 CHARACTERISTICS--Single +5V Supply (V+ = +5V 10%, GND = 0, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V+ V ANALOG SWITCH Analog Signal Range VCOM, VNO, VNC 0 RON V+ = 4.5V, VNO or VNC = 3.5V, ICOM = 100mA TA = +25C RON V+ = 4.5V, ICOM = 100mA, VNO or VNC = 3.5V TA = +25C On-Resistance Flatness (Note 5) RFLAT(ON) V+ = 4.5V; ICOM = 100mA; VNO or VNC = 0, 1V, 2V TA = +25C NO or NC Off-Leakage Current INO(OFF), INC(OFF) V+ = 5.5V; VCOM = 1V, 4.5V; TA = +25C VNO or VNC = 4.5V, 1V TA = TMIN to TMAX COM On-Leakage Current ICOM(ON) V+ = 5.5V; VCOM = 1V, 4.5V; TA = +25C VNO or VNC = 1V, 4.5V, or TA = TMIN to TMAX floating On-Resistance On-Resistance Match Between Channels (Note 4) Overcurrent-Protection Current Threshold 0.65 TA = TMIN to TMAX 1 1.2 0.06 TA = TMIN to TMAX 0.12 0.15 0.08 TA = TMIN to TMAX 0.12 0.15 -2 0.01 -20 -4 2 20 0.3 nA 4 nA -40 TA = +25C 40 1.2 A DYNAMIC Turn-On Time tON VNO or VNC = 3V, Figure 2 Turn-Off Time tOFF VNO or VNC = 3V, Figure 2 Break-Before-Make Delay (Note 6) tBBM MAX4624 only, Figure 3a Make-Before-Break Delay (Note 6) tMBB MAX4625 only, Figure 3b 2 TA = +25C 40 TA = TMIN to TMAX 50 60 TA = +25C 40 TA = TMIN to TMAX 50 60 TA = +25C 1 TA = TMIN to TMAX 1 TA = +25C 1 TA = TMIN to TMAX 1 20 6 _______________________________________________________________________________________ ns ns ns ns 1, Low-Voltage, Single-Supply SPDT Analog Switches (V+ = +5V 10%, GND = 0, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted.) (Notes 2, 3) PARAMETER Charge Injection SYMBOL COM On-Capacitance TYP MAX UNITS pC RL = 50, CL = 5pF, f = 1MHz, TA = +25C, Figure 5 -57 dB RL = 50, CL = 5pF, f = 1MHz, TA = +25C, Figure 5 -57 dB COFF f = 1MHz, TA = +25C, Figure 6 32 pF CCOM(ON) f = 1MHz, TA = +25C, Figure 6 100 pF OIRR Crosstalk (Note 8) NC or NO Off-Capacitance MIN 65 Q Off-Isolation (Note 7) CONDITIONS CL = 1.0nF, VGEN = 0, RGEN = 0, TA = +25C, Figure 4 LOGIC INPUT Input Voltage Low VINL 0.8 V Input Voltage High VINH 2.4 Logic Input Current IIN -1 1 A 1.8 5.5 V 10 A MAX UNITS V+ V V SUPPLY Power-Supply Range V+ Positive Supply Current I+ V+ = 5.5V, VIN = 0 or V+ ELECTRICAL CHARACTERISTICS--Single +3V Supply (V+ = +2.7V to +3.6V, GND = 0, VINH = 2.0V, VINL = 0.6V, TA = TMIN to TMAX, unless otherwise noted.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS MIN TYP ANALOG SWITCH Analog Signal Range On-Resistance VCOM, VNO, VNC RON On-Resistance Flatness (Note 6) RFLAT(ON) 0 V+ = 2.7V, VNO or VNC = 1.5V, ICOM = 100mA TA = +25C 1.2 TA = TMIN to TMAX 2.0 2.5 V+ = 2.7V; ICOM = 100mA; VNO or VNC = 0, 0.75V, 1.5V; TA = +25C 0.25 DYNAMIC Turn-On Time tON VNO or VNC = 1.5V, Figure 2 TA = +25C Turn-Off Time tOFF VNO or VNC = 1.5V, Figure 2 TA = +25C Break-Before-Make Time Delay (Note 4) tBBM MAX4624 only, Figure 3a 1 40 ns Make-Before-Break Time Delay (Note 4) tMBB MAX4625 only, Figure 3b 1 8 ns 40 pC Charge Injection Q 65 TA = TMIN to TMAX 100 62 TA = TMIN to TMAX CL = 1.0nF, Figure 4, VGEN = 0, RGEN = 0, TA = +25C 80 80 100 ns ns _______________________________________________________________________________________ 3 MAX4624/MAX4625 ELECTRICAL CHARACTERISTICS--Single +5V Supply (continued) ELECTRICAL CHARACTERISTICS--Single +3V Supply (continued) (V+ = +2.7V to +3.6V, GND = 0, VINH = 2.0V, VINL = 0.6V, TA = TMIN to TMAX, unless otherwise noted.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 0.6 V 1 A 10 A LOGIC INPUT Input Voltage Low VINL Input Voltage High VINH 2.0 Logic Input Current IIN -1 V SUPPLY Positive Supply Current I+ V+ = 3.6V, VIN = 0 or V+ Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value is a maximum, is used in this data sheet. Note 3: SOT-packaged parts are 100% tested at +25C. Limits across the full temperature range are guaranteed by design and correlation. Note 4: RON = RON(MAX) - RON(MIN). Note 5: Flatness is defined as the difference between the maximum and minimum values of on-resistance as measured over the specified analog signal range. Note 6: Guaranteed by design. Note 7: Off-Isolation = 20log10 [VCOM / (VNC or VNO)], VCOM = output, VNC or VNO = input to off switch. Note 8: Between the two switches. __________________________________________Typical Operating Characteristics (TA = +25C, unless otherwise noted.) ON-RESISTANCE vs. COM VOLTAGE OVER SUPPLY VOLTAGE +1.8V T = +105C TA = +85C A TA = +25C 120 MAX4624 toc03 1.00 MAX4624 toc02 VCOM = 100mA 5 TURN-ON/OFF TIMES vs. SUPPLY VOLTAGE ON-RESISTANCE vs. COM VOLTAGE OVER TEMPERATURE MAX4624 toc01 6 100 0.75 RON () +2.0V 3 1 +5V 1 2 60 tON 40 tOFF 20 V+ = 5V ICOM = 100mA 0 0 0 80 0.25 0 3 VCOM (V) 4 0.50 TA = -40C TA = -55C +2.3V +2.5V +3.0V 2 tON/tOFF (ns) 4 RON () MAX4624/MAX4625 1, Low-Voltage, Single-Supply SPDT Analog Switches 4 5 0 1 2 VCOM (V) 3 4 5 2 3 4 VSUPPLY (V) _______________________________________________________________________________________ 5 6 1, Low-Voltage, Single-Supply SPDT Analog Switches ON/OFF-LEAKAGE CURRENT vs. TEMPERATURE tON 20 50 MAX4625 1 0 Q (pC) ON/OFF-LEAKAGE (nA) 30 0.1 MAX4624 -50 -100 0.01 10 -150 tOFF 0.001 0 0 20 40 60 -200 -40 80 -20 0 20 40 60 80 100 0 10 2.5 -30 -20 -40 -30 OFF-ISOLATION -50 -40 -60 -50 -70 -60 V+ = 5V 50 = IN/OUT -90 1M 10M PHASE (degrees) -10 LOGIC THRESHOLD VOLTAGE (V) -0 ON-PHASE -80 2.0 5 VIN RISING 1.5 VIN FALLING 1.0 0.5 -70 -80 100M 0 2 3 4 5 FREQUENCY (Hz) SUPPLY VOLTAGE (V) TOTAL HARMONIC DISTORTION vs. FREQUENCY OVERCURRENT RESPONSE MAX4624 toc09 0.1 4 MAX4624 toc08 ON-LOSS -10 3 LOGIC THRESHOLD VOLTAGE vs. SUPPLY VOLTAGE MAX4624 toc07 0 30k 100k 2 VCOM (V) FREQUENCY RESPONSE -20 1 TEMPERATURE (C) TEMPERATURE (C) 6 MAX4624 toc10 -20 LOSS (dB) -40 3.3V 0 THD (%) tON/tOFF (ns) 40 100 MAX4624TOC5 V+ = 5V VNO or VNC = 3V CHARGE INJECTION vs. COM VOLTAGE 10 MAX4624TOC4 50 MAX4624 toc06 TURN-ON/OFF TIMES vs. TEMPERATURE VCOM 2V/div 0.01 1.5A ICOM 1A/div 0 0.001 10 100 1k 10k 100k 1ms/div FRQUENCY (Hz) _______________________________________________________________________________________ 5 MAX4624/MAX4625 _____________________________Typical Operating Characteristics (continued) (TA = +25C, unless otherwise noted.) MAX4624/MAX4625 1, Low-Voltage, Single-Supply SPDT Analog Switches Pin Description PIN NAME FUNCTION 1 IN Digital Control Input 2 V+ Positive Supply Voltage Input 3 GND 4 NC 5 COM 6 NO Ground Analog Switch--Normally Closed Analog Switch--Common Analog Switch--Normally Open Detailed Description The MAX4624/MAX4625 are low-on-resistance (RON), low-voltage, single-pole/double-throw (SPDT) analog switches that operate from a +1.8V to +5.5V supply. The MAX4624 has break-before-make switching, and the MAX4625 has make-before-break switching. These devices also have fast switching speeds (tON = 50ns max, tOFF = 50ns max). When powered from a +5V supply, their 1 max RON allows high continuous currents to be switched in a variety of applications. In an overcurrent condition, these switches provide both current-limit and thermalshutdown protection. Current-Limit Protection The MAX4624/MAX4625 feature current-limit protection circuitry. When the voltage drop across the on switch reaches 0.6V typ, the internal circuitry activates. The current limit is not instantaneous, but rather integrates POSITIVE SUPPLY D1 V+ MAX4624 MAX4625 NO COM Vg GND D2 Figure 1. Overvoltage Protection Using Two External Blocking Diodes 6 over time, so current limiting will not activate when the switch output charges a small 0.1F capacitor. For sustained overload conditions, the switch turns off (opens). The switch turns on after 5ms. If the overload persists, the switch cycles off and on to produce a pulsed output. A direct short circuit will be detected immediately, and the switch will pulse on for 1s, then remain off for 5ms. Applications Information Logic Inputs The MAX4624/MAX4625 logic inputs can be driven up to +5.5V regardless of the supply voltage. For example, with a +3.3V supply, IN may be driven low to 0V and high to 5.5V. Driving IN Rail-to-Rail(R) minimizes power consumption. Analog Signal Levels Analog signals that range over the entire supply voltage (V+ to GND) can be passed with very little change in on-resistance (see Typical Operating Characteristics). The switches are bidirectional, so the NO, NC, and COM pins can be used as either inputs or outputs. Power-Supply Sequencing and Overvoltage Protection Caution: Do not exceed the absolute maximum ratings because stresses beyond the listed ratings may cause permanent damage to the devices. Proper power-supply sequencing is recommended for all CMOS devices. Always apply V+ before applying analog signals, especially if the analog signal is not current limited. If this sequencing is not possible, and if the analog inputs are not current limited to <20mA, add Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. _______________________________________________________________________________________ 1, Low-Voltage, Single-Supply SPDT Analog Switches Protection diodes D1 and D2 also protect against some overvoltage situations. With Figure 1's circuit, if the supply voltage is below the absolute maximum rating, and if a fault voltage up to the absolute maximum rating is applied to an analog signal pin, no damage will result. Test Circuits/Timing Diagrams MAX4624 MAX4625 V+ V+ COM NO OR NC VIN_ LOGIC INPUT 50% VINL VOUT RL 50 CL 35pF t OFF IN VOUT GND LOGIC INPUT SWITCH OUTPUT 0.9 * V0UT 0.9 * VOUT 0V t ON CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VN_ RL + RON ( t r < 5ns t f < 5ns VINH LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. ) Figure 2. Switching Time V+ MAX4624 LOGIC INPUT V+ VN_ NC 50% VINL VOUT COM VINH NO RL 50 IN LOGIC INPUT CL 35pF GND 0.9 * VOUT VOUT tD CL INCLUDES FIXTURE AND STRAY CAPACITANCE. Figure 3a. Break-Before-Make Interval (MAX4624 only) _______________________________________________________________________________________ 7 MAX4624/MAX4625 a small-signal diode (D1) as shown in Figure 1. If the analog signal can dip below GND, add D2. Adding protection diodes reduces the analog range to a diode drop (about 0.7V) below V+ (for D1), and a diode drop above ground (for D2). On-resistance increases slightly at low supply voltages. Maximum supply voltage (V+) must not exceed +6V. Adding protection diode D2 causes the logic threshold to be shifted relative to GND. TTL compatibility is not guaranteed when D2 is added. 1, Low-Voltage, Single-Supply SPDT Analog Switches MAX4624/MAX4625 Test Circuits/Timing Diagrams (continued) V+ MAX4625 V+ NC VCOM VINL VNC NO VNC 0.8 * VOUT VNO RL 50 LOGIC INPUT VINH LOGIC INPUT CL 35pF RL 50 CL 35pF 0.8 * VOUT GND VNQ tMBB CL INCLUDES FIXTURE AND STRAY CAPACITANCE. Figure 3b. Make-Before-Break Interval (MAX4625 only) V+ MAX4624 MAX4625 VOUT V+ RGEN VOUT COM NC OR NO VOUT IN OFF CL V GEN GND OFF ON IN IN VINL TO VINH ON OFF OFF Q = (V OUT )(C L ) IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH. Figure 4. Charge Injection +5V 10nF V OFF-ISOLATION = 20log OUT VIN NETWORK ANALYZER 0V OR V+ IN NC V+ COM MAX4624 MAX4625 NO 50 GND 50 VIN VOUT V ON-LOSS = 20log OUT VIN 50 MEAS 50 REF V CROSSTALK = 20log OUT VIN 50 MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NO_ OR NC_ TERMINAL ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" NO_ OR NC_TERMINAL ON EACH SWITCH. CROSSTALK IS MEASURED FROM ONE CHANNEL TO ALL OTHER CHANNELS. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED. Figure 5. On-Loss, Off-Isolation, and Crosstalk 8 _______________________________________________________________________________________ 1, Low-Voltage, Single-Supply SPDT Analog Switches TRANSISTOR COUNT: 186 V+ 10nF V+ COM MAX4624 MAX4625 IN CAPACITANCE METER f = 1MHz NC or NO VINL OR VINH GND Figure 6. Channel Off/On-Capacitance _______________________________________________________________________________________ 9 MAX4624/MAX4625 Chip Information 1, Low-Voltage, Single-Supply SPDT Analog Switches 6LSOT.EPS MAX4624/MAX4625 Package Information 10 ______________________________________________________________________________________ 1, Low-Voltage, Single-Supply SPDT Analog Switches Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX4624/MAX4625 Package Information (continued)