MITSUMI
IC for System Reset PST90XX
IC for System Reset
Monolithic IC PST90XX Series
Outline
November 9, 2001
The function of this low voltage detection type IC is to accurately reset systems after detecting the supply
voltage at the time of switching power on and instantaneous power off in various CPU and other logic
systems. This IC, with its super low consumption current and high precision voltage detection capacity, is
most suited as a voltage check circuit for a number of products which use batteries.
Features
1. High precision voltage detection
V
S
鹵2.5% max.
2. Super low current consumption
I
CCH
=1.5碌A(chǔ) typ. I
CCL
=1碌A(chǔ) typ.
3. Low operating threshold voltage
0.7V max.
4. Hysteresis voltage is provided as a detect voltage
Vs 5% typ.
5. The detect voltage can be selected at your discretion at 0.1 V step within the range of 0.8 to 1.8V by the
following stipulation method.
PST90XX
Detected voltage value
(Example : for 0.8V 路路路路路路 PST9008)
Packages
TO-92A (PST90
SOT-25A (PST90
)
N)
Applications
1.
2.
3.
4.
5.
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
Pin Assignment
1
1
2
3
1
2
3
V
OUT
V
CC
GND
1
2
3
5
4
2
3
4
5
SOT-25A
(TOP VIEW)
Note : The pin 2 of SOT-25 package is a SUB terminal. Connect it to GND.
TO-92A
NC
SUB
GND
V
OUT
V
CC
1
2
3
