IC for System Reset PST70XX
MITSUMI
IC for System Reset
Monolithic IC PST70XX Series
May 21, 2002
Outline
This IC is a low-reset type system reset IC and 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.
It includes a high-precision voltage detection function with ultra-low current consumption and is ideal for
voltage check circuits for products using a battery.
ue
on
tin
High-precision voltage detection
Vs±2% max.
Ultra-low current consumption
ICCH=2µA typ. ICCL=3µA typ.
Low operating limit voltage
0.65V typ.
Hysteresis voltage provided for detection voltage
50mV typ.
Large output current during power-on
30mA typ.
Detection voltage can be selected as desired within a range of 1.9 to 4.6V
by 0.1V step, as indicated below.
PST70XX
Detection voltage value
(Example: for 4.6V ....... PST7046)
di
sc
1.
2.
3.
4.
5.
6.
d
Features
be
Packages
o
MMP-3A (PST70
M)
TO-92A (PST70
)
The box represents a rank of detection voltage.
Reset circuits for microcomputers, CPUs and MPUs
Reset circuits for logic circuits
Battery voltage check circuits
Back-up power supply switching circuits
Level detection circuits
Pr
od
1.
2.
3.
4.
5.
uc
t
Applications
st
*
Pin Assignment
1
2
2
3
TO-92A
VOUT
1
3
2
MMP-3A
(TOP VIEW)
1
VCC
2
GND
3
1
VCC
GND
3
VOUT
