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| MITSUBISHI M51981ML / SL VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES DESCRIPTION M51981 are semiconductor integrated circuits designed for detecting supply voltage and resetting all types of logic circuits such as CPUs. They find extensive applications,including battery checking circuits, level detecting circuit and waveform shaping circuit. FEATURES * Few external parts. * Low threshold operating voltage (Supply voltage to keep low-state at low supply voltage) ...... 0.6V(TYP.) at RL=22k * Wide supply voltage range ............ 2 to 17V * Sudden change in power supply has minimal effect on the ICs * Wide application range APPLICATION * Reset pulse generation for almost all logic circuits * Battery checking, level detecting, waveform shaping circuits * Delayed waveform generator * Switching circuit to a back-up power supply * DC/DC converter * Over voltage protection circuit RECOMMENDED OPERATING CONDITION * Supply voltage range ............ 2 to 17V PIN CONFIGURATION (TOP VIEW) M51981ML 3 OUTPUT 2 GND 1 SUPPLY VOLTAGE Outline SOT-89 (1) SUPPLY VOLTAGE (2) GND (3) OUTPUT (1) (2) (3) Outline TO-92L BLOCK DIAGRAM SUPPLY VOLTAGE 1 R1 3 OUTPUT R2 1.25V 2 GND M51981SL 1999-8- 24 ( 1/3) MITSUBISHI M51981ML / SL VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES FUNCTION DIAGRAM Vs+Vs 4.40V SUPPLY VOLTAGE Vs Vs 0.67V t H OUTPUT STATE L t OUTPUT UNDEFIND ABSOLUTE MAXINUM RATINGS (Ta=25C Unless otherwise noted) Symbol ICC Isink VO Pd K0 Topr Tstg Parameter Supply Voltage Output Sink Current Output Voltage Power Dissipation Thermal Derating Operating Temperature Storage Temperature Test condition Ratings 18 6 18 700 500 7 5 -30 to +85 -40 to +125 Unit V mA V mW mW/C C C Output with constant current load SL:TO-92L ML:SOT-89 SL:TO-92L Ta25C ML:SOT-89 ELECTRICAL CHARACTERISTICS (Ta=25C, Unless otherwise noted) Symbol VS Parameter Detecting Voltage Hysterisis Voltage Detecting Voltage Temperature Coefficient Circut Current Output Saturation Voltage Threshold Operating Voltage Output Leakage Current Propagation Deray Time Test condition MIN 4.20 30 Limits TYP 4.40 50 0.01 MAX 4.60 80 Unit V mV %/C VS VS/T ICC Vsat VOPL IOH tPHL tPLH VCC=5V VCC=4V,Isink=4mA Minimum supply voltage RL=2.2k,Vsat0.4V for IC operation RL=100k,Vsat0.4V 340 0.2 0.67 0.55 Ta= -30 to +85C Response time when Vcc changes H to L Response time when Vcc changes L to H 510 0.4 0.8 0.7 30 1 A V V nA A s 6 3 (2/3) 1999-8- 24 MITSUBISHI M51981ML / SL VOLTAGE DETECTING, SYSTEM RESETTING IC SERIES Example of application circuit Reset Circuit of M51981 VCC SUPPLY VOLTAGE OUTPUT RL SUPPLY VOLTAGE RESET(RESET) LOGIC CIRCUIT M51981 GND Cd GND Note 1. The logic circuit preferably should not have a pull-down resistor,but if one is present,add load resistor RL to overcome the pulldown resistor. (3/3) 1999-8- 24 |
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