MITSUBISHI <Dig./Ana. INTERFACE> MS 1957A,B/MS1958A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES DESCRIPTION M51957A,B/M51958A,B are semiconductor integrated circuits ideal for detecting input valtage and resetting all types of logic PIN CONFIGURATION (TOP VIEW) circuits such as CPUs. J is] OUTPUT They include a built-in delay circuit to provide the desired a a 4] DELAY CAPACITOR retardation time simply by adding an external capacitor. = = 3] GNO Applications are extensive, including circuits for battery ae ' checking, level detecting and waveform shaping. s $ 2] nee oO i SUPPLY VOLTAGE FEATURES Outline 5PST @ Few external parts @ Large delay time with a capacitor of small capacitance (tq ~ 100ms, at 0.334F) (M51957, M51958) @ Low threshoid operating voltage (Supply voltage to keep NC a low-state at low supply voltage)... .......--22.--00- INPUT (2] bee ee 0.6V (TYP.) at RL = 22kQ NC By @ Wide supply voltage range. ............... 2~17V @ Sudden change in power supply has minimal effect on the ICs Outline 8P2S-A Wide operation range of detecting input pin... Narrower ranges of -O.3V ~ Vee 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 same height as DIP (5-pin SEP) oO 8] NC 7] SUPPLY VOLTAGE [6] ourput [5] OLLAY CAPACITOR V8S561SIN VLS6ISW j8/ dia/ GND | 4 NC: NO CONNECTION 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 ......... 0.02. e ee eee 2~ 17V BLOCK DIAGRAM M51957A,B M51958A, B . Y . VOLTAGE A: Built-in Load VOLTAGE A: Built-in Load B: Open Collector B: Open Collector INPUT GND DELAY CAPACITOR GND DELAY CAPACITOR MITSUBISHI ; ELECTRIC 733MITSUBISHI <Dig./Ana. INTERFACE> MS 1957A,B/M51958A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES FUNCTION DIAGRAM M51957A, B M51958A,B 1.25y CH 1.25V (2 ----S INPUT INPUT VOLTAGE VOLTAGE t t H H OUTPUT OUTPUT STATE ta ta STATE ta ta L L ta==0. 34 XCq( pF) sec ' tq0. 34X Ca( pF) zsec ABSOLUTE MAXIMUM RATINGS (Ta=25C. unless otherwise noted) Symbol Parameter Conditions Ratings Unit Voc Supply voltage 18 Vv !sink Output Sink Current 6 mA A Type (Output with constant current load) ! Veco Vo Output voltage 4 Vv B Type (Open collector output) 18 SP SIL 450 Pd Power dissipation rm mW 8P FLAT 300 5P SIL 4.5 Ka Thermal Deratng Taz25c - oe mw/'C 8P FLAT 3 Topr Operating temperature ' 30~+85 Cc Tstg Storage temperature | -40+125 Cc ELECTRICAL CHARACTERISTICS (ta=25%, uniess othewise noted) L reset type 'H reset type M51957A M51958A M51957B M51958B Limits Symbol Parameter ' Test conditions Unit Min Typ Max Vs Detecting vaitage 1,20 1.25 1.30 Vv dAVs | Hystensis voltage Veco =5V 9 15 23 mv Vs/ dT Detecting Voltage Ternperature Coefficient | _ 0.01 - LC Vee Supply Voltage Range _ + Ta=30~4+85C 2 _ 7 Vv Ta=30~ +850. Voc 7V 0.3 Voc VIN Input voltage Range Vv Ta= 30~ +85, Veo >7V 0.3 _ 7 tin | Input Current ViIn= 1.25V _ 100 500 nA | Type A Veg = 5V = 390 | 590 loc 2 Circuit Current \ wa A i Type B Veg =5V _ 360 540 tod Delay Time ' Ta=30~+85C, Cq=0.01nF (Nete) 1.6 3.4 7 ms Ipd Constarit Current at Cd pin Veo =5V 8 5 -3 uA L reset type Veo=5V. Vins 1.2V, Ilsink=4mA Vsat Output Saturation Voltage Pave ee ~ c - _ 0.2 0.4 v H reset type Voo =5V. Vin ~ 1.35V, Isink =4mA L reset type minsmum RL=2.2kQ, Vsat=0.4V _ 0.67 0.8 VoPL Threshotd Operating Voltage supply voltage - Vv _ | fer IC operation RL= 100k2, Vsat=0.4V _ 0.55 0.7 | Type B _ _ 30 nA loH Output Leakage Current toe Type B, Ta= 30~4+ 85C _ 1 uh loc Output Load Current Type A Voo = 5V. Vo=1/2 Veo - 40 25 ~7 uA VoH Output High Voltage Type A Veco 0.2 | Veco 0.06 _ iv Note. Delay tme car be changed by changing delay capacitur for external derav capacitor types (Please refer te typical characteristics.) MITSUBISHI 734 ELECTRICMITSUBISHI <Dig./Ana. INTERFACE> M5 1957A,B/MS1958A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES TYPICAL CHARACTERISTICS TYPICAL CHARACTERISTICS DETECTING VOLTAGE VS. THERMAL DERATING AMBIENT TEMPERATURE (MAXIMUM RATING) (Input voltage detecting series) 1000 1.28 S = 1.27 = = 800 = Vsn = ogf tT Cc 3 600 Q 5 = 1.25 Vst-J : St Fr | SPIN SIP S a 400 oO a TS 8PIN FLAT = 1.24 ry 1 5 = q B & 200 oN 6 1.23 ~<Pyy 0 * 1.22 0 25 50 75 100-125 40-20 0 20 40 60 80 100 AMBIENT TEMPERATURE Ta (C) AMBIENT TEMPERATURE Ta (C) DETECTION VOLTAGE VS. INPUT CURRENT VS. SUPPLY VOLTAGE SUPPLY VOLTAGE (Input voltage detection series) (Input voltage detecting series) 1. 250 Vin=1. 25V > 1. gz 200 2 w z g - 150 5 a Oo 1. cc > a g 3 100 F 1. 5 S = 50 a 1. i. 0 0 4 8 12 16 20 0 4 8 12 16 20 SUPPLY VOLTAGE Vec {V} SUPPLY VOLTAGE Vec (V} DELAY CAPACITANCE VS. DELAY TIME VS. DELAY TIME AMBIENT TEMPERATURE (M5195XX, External delay capacitor type) (M5195XX, External delay capacitor type) 10 6 i Viotbv Co=0. 01 pF . 3 5 Sy 3 cS Ee 4 ge 3 3 Zz Ww 0.1 s 3 Go 7 = < 5 .. z 3 < 2 % 0. o a uu 5 1 a 3 0. 001 0 0.7 357 2357 357 357 4020 0 20 40 60 80 100 1 10 100 1000 DELAY TIME tod (ms) AMBIENT TEMPERATURE Ta (C} MITSUBISHI : ELECTRIC . 736MITSUBISHI <Dig./Ana. INTERFACE> MS 1957A,B/M51958A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES CONSTANT CURRENT AT Cd PIN VS. AMBIENT TEMPERATURE THRESHOLD OPERATING VOLTAGE (M5195XX, External delay capacitor type) ({L] reset type) _ 12 1 1.0 T 4 Veo=5v | Ta=25T 2 = Voc=15V ete _ 0.8 a 2 & 8 5 & o 0.6 an th 9g RL_=2.2kQ Zz 6r == & . ta ee ~~ = | protneemead ae ad 7 Po 0.4 R= 22k a7 - g RL=100k@ S oo 2 Ww 6 og 0 NO ~40~-20 0 20 40 60 80 100 0 02 04 O06 28 1,0 AMBIENT TEMPERATURE Ta (C) SUPPLY VOLTAGE Vec (V) OUTPUT LOAD CURRENT VS. OUTPUT SATURATION VOLTAGE VS. OUTPUT VOLTAGE OUTPUT SINK CURRENT (M519XXA) 0.3 LA i Z. oS nh Vec=5V} Vec=10V Veg=15V \ OUTPUT SATURATION VOLTAGE Vsgt OUTPUT LOAD CURRENT loc (uA) L } 2 3 4 5 6 0 4 8 12 16 oO oa OUTPUT SINK CURRENT Isink (mA) OUTPUT VOLTAGE Vo (V) CIRCUIT CURRENT VS. SUPPLY VOLTAGE (M51957B, M5 1958B) 800 600 400 CIRCUIT CURRENT lec (MA) 0 4 8 12 16 SUPPLY VOLTAGE Vee (V) MITSUBISHI 736 . ELECTRICMITSUBISHI <Dig./Ana. INTERFACE> M5 1957A,B/MS1958A,B VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES EXAMPLE OF APPLICATION CIRCUIT M5 195XX Series Reset Circuit Voc t SUPPLY | J surrey R, VOLTAGE SA, VOLTAGE INPUT M51957x RESET( RESET) M51958xX QUTPUT Re 1 GND ppetay CAPACITOR GND Cc To 1 Note 1. When the detecting supply voltage is 4.25V, Note 3, If M5195XX and the logic circuit have a common M51951, M51952, M51953 and M51964 are used. In the case, Ry and R, are not necessary. When the voltage is anything except 4.25V, M51955, M51956, M51957 and M51958 are used. In this case, Aa + fa ty) Ra 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 200us. 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. the detecting supply voltage is 1.25 x Case of Using Other Reset Signal except Supply Voltage in the M5195XX Series (a) Reset at ON 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 low 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 Vec Vee r L f + [surrey youre [ourrey \ J surety $A VOLTAGE $A. VOLTAGE R, VOLTAGE Sr, VOLTAGE KNPUT] INPUT! \ M5195XX M5195XX | - \O-4+_-O -- KO+-_OF &--OlexTEANAL DELAY a RESET( RESET) ' OW EXTERNAL DELAY RESET( RESET) CAPACITOR TYPE) UT CAPACITOR TYPE} | CUTPUT $A. GND DELAY GND zr. GND DELAY GND 4 CAPACITOR CAPACITOR i Cg | Ca | ane Po ft te dT | ar CONTROL h SIGNAL RESET AT ON RESET AT TRANSISTOR ON ELECTRIC 737MITSUBISHI <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 > M51957 32 (4 M51958 GND ue CAPACITOR Cq Operating Waveform (a) M51957 (b) M51958 INPUT INPUT OUTPUT td OUTPUT ta ta=0. 34% Ca(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 OF M5195xXB ~~ 9 MITSUBISHI 738 ELECTRICMITSUBISHI <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. at Q, ON: Ro * [ee + Vee = (Ri//R3)* lec) + (Ry //R3)V . ___ + . + . 2 RI +R3) cc i//R3)* lec ii Ag BEI Ro + (R,//R3) at Q, OFF: R3 Ro * 9s Ve - (Ri R33) * | \ 2 {fa cc - (Ri //R3) * Ice R,+(R,//R3) Ri* Rs R,/Rk3; = 1//Rs R, + Ro Vee: Circuit current of M5195XB Vee,: 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 te INPUT ~H M5195XB pone OUTPUT 9 MITSUBISHI ELECTRIC 89