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PST574

System Reset Monolithic IC

Mitsumi 

MITSUMI

System Reset

Monolithic IC PST574

System Reset 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

1. Ultra-low current consumption

2. Low operating limit voltage

3. Output current high for ON

4. Hysteresis voltage provided in detection voltage

5. Built-in delay circuit with excellent delay time

temperature characteristics

6. 10 ranks of detection voltage

ICCH=7.5µA typ. ICCL=400µA typ.

0.65V typ.

30mA typ.

50mV typ.

50mV typ.

PST574

C : 4.5V typ.

D : 4.2V typ.

E : 3.9V typ.

F : 3.6V typ.

G : 3.3V typ.

H : 3.1V typ.

I : 2.9V typ.

J : 2.7V typ.

K : 2.5V typ.

L : 2.3V typ.

Package

MMP-3A (PST574 M)

TO-92A (PST574 )

* contains detection voltage rank .

Applications

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.

Pin Assignment

123

TO-92A

1

VCC

2

GND

3

VOUT

1

3

2

MMP-3A

1

VCC

2

GND

3

VOUT

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