MITSUMI

System Reset PST574

System Reset

Monolithic IC PST574

Outline

This IC functions 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. This ultra-low current consumption low

reset type system reset IC has a built-in fixed delay time generating circuit. It is ideal for use in multi-CPU

systems because a fast-rising output waveform can be obtained.

Features

Package

Applications

Pin Assignment

1. Ultra-low current consumption

2. Low operating limit voltage

0.65V typ.

3. Output current high for ON

30mA typ.

4. Hysteresis voltage provided in detection voltage

50mV typ.

5. Built-in delay circuit with excellent delay time

50mV typ.

temperature characteristics

6. 10 ranks of detection voltage

PST574

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.

MMP-3A (PST574

M)

TO-92A (PST574

)

1. Reset circuits in microcomputers, CPUs and MPUs (especially multi-CPU sets)

2. Logic circuit reset circuits.

3. Battery voltage check circuits.

4. Back-up power supply switching circuits.

5. Level detection circuits.

12

3

TO-92A

3

1

2

MMP-3A

1

2

GND

3

1

2

GND

3