PST591 参数 Datasheet PDF下载

MITSUMI

System Reset PST591~595

System Reset

Monolithic IC PST591~595 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 PST574/PST575, but these new low reset

type system reset ICs expand the delay time series with a counter timer using an analog/digital hybrid circuit.

Features

1. Fixed delay time setting by counter timer

Excellent delay time temperature characteristics

2. Low operating limit voltage

3. Hysteresis voltage provided in detection voltage

4. Current consumption for no-load

5. 5 delay time products available

±800ppm/

°

C

0.65V typ.

50mV typ.

I

CCL

=300µA typ. I

CCH

=200µA typ.

PST591 50mS

PST592 100mS

PST593 200mS

C : 4.5V typ.

D : 4.2V typ.

E : 3.9V typ.

F : 3.6V typ.

G : 3.3V typ.

PST594 400mS

PST595 800mS

H : 3.1V typ.

I : 2.9V typ.

J : 2.7V typ.

K : 2.5V typ.

6. Each product has 9 detection voltage ranks.

Package

MMP-4A (PST59

M)

TO-92A (PST59

)

contains detection voltage rank.

(MMP-4A has a manual reset pin, which should be set at GND or NC during normal operation.)

*

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