To all our customers Regarding the change of names mentioned in the document, such as Mitsubishi Electric and Mitsubishi XX, to Renesas Technology Corp. The semiconductor operations of Hitachi and Mitsubishi Electric were transferred to Renesas Technology Corporation on April 1st 2003. These operations include microcomputer, logic, analog and discrete devices, and memory chips other than DRAMs (flash memory, SRAMs etc.) Accordingly, although Mitsubishi Electric, Mitsubishi Electric Corporation, Mitsubishi Semiconductors, and other Mitsubishi brand names are mentioned in the document, these names have in fact all been changed to Renesas Technology Corp. Thank you for your understanding. Except for our corporate trademark, logo and corporate statement, no changes whatsoever have been made to the contents of the document, and these changes do not constitute any alteration to the contents of the document itself. Note : Mitsubishi Electric will continue the business operations of high frequency & optical devices and power devices. Renesas Technology Corp. Customer Support Dept. April 1, 2003 2tENESAS Renesas Technology Corp.MITSUBISHI <Dig./Ana. INTERFACE> MS 1957A,B/MS1958A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES DESCRIPTION M51957A4,B/M51958A,B are semiconductor integrated circuits ideal for detecting input voltage and resetting all types of logic circuits such as CPUs. They include a built-in delay circuit to provide the desired retardation time simply by adding an external capacitor. Applications are extensive, including circuits for battery checking, level detecting and waveform shaping. FEATURES @ Few external parts @ Large delay time with a capacitor of small capacitance {tg = 100ms, at 0.33F) (M51957, M51958) Low threshoid operating voltage (Supply voltage to keep low-state at low supply voltage)... 2... eee 2 Se BRIREee 0.6V (TYP.) at Ry = 22k2 @ Wide supply voltage range. ... 2... 0.000005 2~17V @ Sudden change in power supply has minimal effect on the ICs Wide operation range of detecting input pin... Narrower ranges of -0.3V ~ Vec or -0.3V ~ 7V {Input voltage detecting type) @ Suitable for high supply voltage circuit with simple circuit structure ({M51957B, M519588) @ Permits easy configuration of circuit for protection against reverse connection or surges. (M51957B, M51958B) @ Wide application range SIL package of the sare height as DIP (5-pin SIP) APPLICATION Reset circuit of Pch, Nch, CMOS, microcomputer, CPU and microcomputer, Reset of logic circuit, Battery check circuit, Switching circuit back-up voltage, Level detecting circuit, Waveform shaping circuit, Delay waveform generating circuit, DC-DC converter, Over voltage protection circuit. RECOMMENDED OPERATING CONDITION Supply voltage range... 2... ee eee 2~17V PIN CONFIGURATION (TOP VIEW) [5] oureut [4] DELAY CAPACITOR [3] GND 2] Input oO 1 SUPPLY VOLTAGE M51957A/BL M51958A4/BL Outline 5P5T ncf)]OZ 3/8) nc INPUT [2] 3S [7] SUPPLY VOLTAGE ne [3] BSG > [6] ourput cnofa] dq a [5] OCLAY CAPACITOR Outline 8P2S-A NC: NO CONNECTION BLOCK DIAGRAM MS51957A, B SUPPLY VOLTAGE A: Built-in Load B: Open Collector INPUT INPUT M51958A, B SUPPLY VOLTAGE A. Built-in Load B: Open Collector 7T33MITSUBISHI <Dig./Ana. INTERFACE> MS 1957A,B/MS1958A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES FUNCTION DIAGRAM M51957A, B M51958A, B } 1.25V 1.25V bccn rn hl INPUT INPUT VOLTAGE VOLTAGE H 4 OUTPUT OUTPUT a STATE STATE ta tg L L ta==0. 34 Ca( pF) nsec ta==0. 34XCq(pF) psec ABSOLUTE MAXIMUM RATINGS (1Ta=25C. unless otherwise noted) Symbol Parameter Conditions Ratings Unit Veo Supply voltage - _ 18 Vv Isink Output Sink Current | 6 ae A Type (Qutput with constant current load} ' Vee Vo Output voltage 4 V 8 Type (Open collector output) 18 SP SIL 450 Pa Power dissipation - mw SP FLAT i 300 SP Sil ! 4.5 Ka Thermal Derating TaSz25c t ae mWi @P FLAT 3 Toor Operating temperature 30~ +85 C Tstg Storage temperature ~d0+ 125 c ELECTRICAL CHARACTERISTICS (ta=25C. uniess othewse nated) Lo reset tyoe H reset type M51957A M519584 M51957B M51958B Limits Symbol Parameter Test cnnditians Unit Mun Typ Max Vs Datecung votiage 1.26 1.25 1.30 v dvs 1 Hystensis vollage i Veo =5V 9 15 23 mv Vs/ aT Detecting Voltage Ternperature Coefficient 0.01 96 / Vee Supply Voltage Range | Ta= 30~ +850 2 - 7 Vv i Ta=30~ +85. Vooi7V 6.3 Voc Ving Input voltage Range V Ta= 30 +85, Voc TV -0.3 _ 7 tiny | 'nput Current Vin= 1,25V _ 100 500 nA | | Type A Vcc =5V_ 390 590 fee + Circurt Current ' = uA i L Type BVcco5V _ 360 540 Be or a= tod | Delay Time Ta= -30~ +85, Ca=0.01hF = iNetel 1.6 3.4 7 ms | Ind urematCdpn | Voc = $V -e[ -5 | -3 |] ua L reset type Voo=5V, Vins 1.2, lsink= 4mA Vsat Output Saturation Voltage F ce n _- = 0.2 0.4 Vv H reset type Voo = SV, (Vin 1.35, Isink = 4mA | i L, reset tre minimum AL=22kQ, Vsat 2 0.4V = 0.67 0.8 , Vopy Threshold Operating Vollage supply voltage Vv ~ fer operation / AL=100k9, Vsal=O.4v _ 0.55 0.7 ij 5 Type 8 _ - 30 nA tout Leakage Current oH uiput Leakage Curren Type B. Tas 30~ +85 ss 1 pal loc ri Output Le oad Current Type. A\ Veo = BN. SV. Voz 1/2 Vec _ -40 = 28 -17 pa Vou | Output Tigh Voltage Type A Veo 0.2 Veo- =0.06 _ Vv Note Delay tme car be changed by changing delay capacitor for external deray capauitor types (Please reter ta typical characterstics .} 734 2tENESASMITSUBISHI <Dig./Ana. INTERFACE> MS 1957A,B/M51958A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES TYPICAL CHARACTERISTICS TYPICAL CHARACTERISTICS DETECTING VOE RCE rs (MAXIMUM RATING) (Input voltage detecting series) 1000 | 1, 28 r 5 = 1.27 = 800 = P| cw = 1.26} ae 5 600 @ i = 1.25 Vs._ a L SPIN SIP Ss ae ~ 400 is NY SPIN FLAT = 1.24 feeds 3 200 S & oS. 8 1.23}-4 ae : 0 = 1.22 0 25 50 75 roo) 125 =40-20 0 20 40 60 80 100 AMBIENT TEMPERATURE Ta (c) AMBIENT TEMPERATURE Tg (C) DETECTION VOLTAGE VS. INPUT CURRENT VS. SUPPLY VOLTAGE SUPPLY VOLTAGE (Input voltage detection series) (Input voltage detecting series) 1, 28 250 t Vin = 1. 254 = Lae qZ 200 > Vsa = @ 150 5 aq o 1.25 a ia Ta=30C & | Vsv 3 100} = 1.24 us 5 5 _ Ta=25C 5 2 eg Test 1,23 Tee By 1. 22 0 Oo 4 8 12 16 20 0 4 8 12 16 20 SUPPLY VOLTAGE Vee {VI SUPPLY VOLTAGE Vee {V) DELAY CAPACITANCE VS. DELAY TIME VS . DELAY TIME AMBIENT TEMPERATURE (M5195XX, External delay capacitor type) (M5195X%X, External delay capacitor type) 10 6 z Voc=5V Cp=0. 01 week ~ 4 5 a - a = 4 wo 3 2 i: = ol =s 3 o 7 r < 5 > s 3? > 0. 01 4 aw 5 1 a 3 0. 001 0 07357 #357 357 357 40-20 0 20 40 60 80 100 1 10 100 1000 DELAY TIME tod (rns} AMBIENT TEMPERATURE Tag (C) 2tENESAS 735MITSUBISHI <Dig./Ana. INTERFACE> M5 1957A,B/MS1958A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES CONSTANT CURRENT AT Cd PIN VS. AMBIENT TEMPERATURE (M5195XX, External delay capacitor type) 12 4 Vee=5V ==* Voc=15V 2-10 as co a S 8 i < BR -f-. 2 6 =p nv Seca! ae ae x PT _ an. 2 eee 6o 4 E Zz qt fe 2. Zz o o 0 -40-20 0 20 40 60 8 100 AMBIENT TEMPERATURE Tg (C) OUTPUT SATURATION VOLTAGE VS. OUTPUT SINK CURRENT 0.3 = of ww a Qo = ZL) 0.2 i] > = L a z YY a S eo.) 7 of w E 7 rate a E a ef 6 oa 1 2 3 4 5 6 OUTPUT SINK CURRENT Isink (mA) CIRCUIT CURRENT VS. SUPPLY VOLTAGE (M5 1957B, M51958B) 800 600 400 CIRCUIT CURRENT ice (WA) 0 4 8 12 16 SUPPLY VOLTAGE Vec (V) output voltage Vout [V! OUTPUT LOAD CURRENT loc (A) THRESHOLD OPERATING VOLTAGE {{L] reset type} 1.0 1 Ta=25C 0.8 0.6 RL=2. 2kQ 0.4 RL =22k 07 \{\x tox J \ Ww i 1 0 i 0 0.2 0.4 0.6 0.8 1,0 SUPPLY VOLTAGE Vee [V1 OUTPUT LOAD CURRENT VS. OUTPUT VOLTAGE (M519XXA) Vec=5V Veco=I10V Vec=15V 0 4 8 12 16 OUTPUT VOLTAGE Vo () 2tENESAS 736MITSUBISHI <Dig./Ana. INTERFACE> M5 1957A,B/M51958A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES EXAMPLE OF APPLICATION CIRCUIT M5195XX Series Reset Circuit Veco r = SUPPLY | SUPPLY Ri VOLTAGE 3 Ry VOLTAGE INPUT M51957Xx | ( RESET( RESET M51958% OUTPUT Ca Re 1 QpEbax CAPACITUH Ee Note 1. When the detecting supply voltage is 4.25V, M51951, M51952, M51953 and M51954 are used. In the case, R; and R2 are not necessary. When the voltage is anything except 4.25V, M51955, M51956, MS1957 and M51958 are used. In this case, Ri + Ra wy the detecting supply voltage is 1.25 x 2 approximately. The detecting supply voltage can be set between 2V and 15V. Note 2. When the delay time is short, M51951, M51952, M51955 and M51956 are available, These ICs have a delay capacity and the delay time is about 200pis. If a longer delay time is necessary, M51953, M51954, M51957 and M51958 are used. In the case, the delay time is about 0.34 x Cd(pF) usec. Case of Using Other Reset Signal except Supply Voltage in the M5195XX Series (a) Reset at ON Veo oom Y 1 Le Ri, VOLTAGE SA, VOLTAGE PUTL = M5195XX 1 (EXTERNAL DELAY RESET( RESET) poe pA = 5 I Q CAPACITOR Type) | OUTPUT A, OGND DELAY GND CAPACITOR ip To RESET AT ON hr Note 3. If M5195XX and the logic circuit have a common power supply, type A (built-in load type} can be applied whether a pull-up resister is included in the logic circuit or not. Note 4. The logic circuit preferably should not have a pull- down resistor, but if one is present, add load resistor Ry to overcome the pull-down resistor. Note 5. When the reset terminal in the logic circuit is of the Jow reset type, M51951, M51953, M51955 and M51957 are used and when the terminal is of the high reset type, M51952, M51954, M51956 and M51958 are used. Note 6. When a negative supply voltage is used, supply voltage side of M5195XX and the GND side are con- nected to negative supply voltage respectively, (b) Reset at transistor ON Vee q T ; SUPPLY \ SUPPLY Sr, VOLTAGE $n VOLTAGE : WNPUT 45195 *--OliexTeRNAL DELAYO-*_O RESET( RESET) CAPACITOR TYPE} OUTPUT SR. GND DELAY GND CAPACITOR Ca T | CONTROL + SIGNAL RESET AT TRANSISTOR ON 2tENESAS f37MITSUBISHI <Dig./Ana. INTERFACE> M5 1957A,B/M51958A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES Delay Waveform Generating Circuit When M51957 and M51958 are used, a waveform with a large delay time can generate only by adding a small capacitor. SUPPLY VOLTAGE INPUT SIGNAL OUTPUT >$o M51957 32 it M51958 GND r" LAY CAPACITOR Cg Operating Waveform {a} M51957 (b) M51958 INPUT tNPUT OUTEUT ta OUTPUT <g>] tg=0. 34% Cal pF) sec Application to High Supply Voltage Circuit The absolute maximum rating of supply voltage for using resistors, these ICs can be used in high supply voltage M51957B, M51958B is 18V. By dividing supply voltage circuit. SUPPLY VOLTAGE Veco SUPPLY VOLTAGE O M5195X B yo Q, a ee = 2tENESAS 738MITSUBISHI <Dig./Ana. INTERFACE> M5 1957A,B/M51958A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES In the above figure, the voltage applied to M5195XB is as follows. The voltage range is set.between 2V and 17V. 4 at Q,; ON: Rs sy R + (Ri //R3)V Ro (RI+Rs) cc - (Ri f//R3}* lec] + (Ri //R3)* Vee) Ro +(Ry//Ra) at Q,; OFF: R3 R2* (Ri+Rs) Veo - (Ri//Rs) * lee Ro+ (Ri //R3) = Ry t Ra R,/R; = Ri? Ra Vee: Circuit current of M5195XB Veer: Base-emitter voltage ~ 0.7V (Transistor Q, ) This circuit provides reverse protection (in case of Using the application circuit, the directly rectified or reverse connection of power supply) and surge protection. smoothing commercial voltage can be applied as shown below. : SUPPLY VOLTAGW COMMERCIAL AC POWER SUPPLY + INPUT =z O M5195xB pone OUTPUT 2tENESAS 739