MITSUMI

System Reset PST596~598

System Reset

Monolithic IC PST596~598 Series

Outline

These ICs function in a variety of CPU systems and other logic systems, to detect power supply voltage and

reset the system accurately when power is turned on or interrupted, and has a built-in fixed delay time

generating circuit. This series has been represented in the past by PST591~595, and these new system reset

ICs offer ultra-small size and low current consumption.

Features

1. Fixed delay time setting by counter timer

2. Low operating limit voltage

0.65V typ.

3. Hysteresis voltage provided in detection voltage

50mV typ.

4. Low current consumption

5. 3 delay time products available

PST596

50mS

PST597 100mS

PST598 200mS

6. Each product has 10 detection voltage ranks.

C : 4.5V typ.

H : 3.1V typ.

D : 4.2V typ.

I : 2.9V typ.

E : 3.9V typ.

J : 2.7V typ.

F : 3.6V typ.

K : 2.5V typ.

G : 3.3V typ.

L : 2.3V typ.

Package

SOT-25A (PST59

N) (with manual reset pin)

Applications

1. Reset circuits in microcomputers, CPUs and MPUs

2. Logic circuit reset circuits.

3. Battery voltage check circuits.

4. Back-up power supply switching circuits.

5. Level detection circuits.

6. Mechanical reset circuits