MITSMI PST591JM, PST591K, PST591KM, PST592C, PST592CM Datasheet
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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 ±800ppm/
°
C
2. Low operating limit voltage 0.65V typ.
3. Hysteresis voltage provided in detection voltage 50mV typ.
4. Current consumption for no-load I
CCL=300µA typ. ICCH=200µA typ.
5. 5 delay time products available
PST591 50mS PST594 400mS
PST592 100mS PST595 800mS
PST593 200mS
6. Each product has 9 detection voltage ranks. 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.
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
MITSUMI
System Reset PST591~595
Equivalent Circuit Diagram
Absolute Maximum Ratings
(Ta=25°C)
Pin Assignment
123
TO-92A
12
43
MMP-4A
1 VCC
2 GND
3 V
OUT
1 VOUT
2
Manual
Reset
3 V
CC
4 GND
Item Symbol Rating Units
Storage temperature T
STG
-
40~+125
°
C
Operating temperature T
OPR
-
20~+75
°
C
Power supply voltage V
CC max.
-
0.3~10 V
Manual reset input voltage V
RES max.
-
0.3~10 V
Allowable loss Pd
200 (MMP-4P)
mW
300 (TO-92)
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