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
1.
2.
3.
4.
5.
Ultra-low current consumption
Low operating limit voltage
Output current high for ON
Hysteresis voltage provided in detection voltage
Built-in delay circuit with excellent delay time
temperature characteristics
6. 10 ranks of detection voltage
I
CCH
=7.5碌A typ. I
CCL
=400碌A 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.
2.
3.
4.
5.
Reset circuits in microcomputers, CPUs and MPUs (especially multi-CPU sets)
Logic circuit reset circuits.
Battery voltage check circuits.
Back-up power supply switching circuits.
Level detection circuits.
Pin Assignment
1
2
3
V
CC
GND
V
OUT
1
3
1
2
V
CC
GND
V
OUT
2
3
1
2
3
MMP-3A
TO-92A
1
2
3
4
5
