IC for System Reset PST600
MITSUMI
IC for System Reset
Monolithic IC PST600
September 6, 2001
Outline
d
This IC functions in a variety of CPU systems and other logic systems, to detect supply voltage and reset the
system accurately when the power is turned on or interrupted. There are other system reset ICs available
such as PST572(conventional). In PST600, the circuit current increases or decreases during power-on
tracking a load current. This is a low-reset type system reset IC with low-current consumption during poweron and power-off.
ue
Features
be
di
sc
on
tin
1. Low current consumption during power-on and power-off as the circuit current increases or decreases
during power-on tracking a load current
No load : ICCL=7µA typ.; ICCH=5µA typ.
2. Low operating limit voltage
0.65V typ.
3. Hysteresis voltage provided for detection voltage 50mV typ.
4. 10 ranks of detection voltages are available.
PST600 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.
Packages
o
MMP-3A (PST600 M)
TO-92A (PST600 )
The box represents a rank of detection voltage.
Applications
uc
t
st
*
Pr
od
1. Reset circuits for microcomputers, CPUs and MPUs
2. Reset circuits for logic circuits
3. Battery voltage check circuits
4. Back-up power supply switching circuits
5. Level detection circuits
Equivalent Circuit
