MITSMI PST9008, PST9008N, PST9009, PST9009N, PST9010 Datasheet
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MITSUMI
System Reset PST90XX
System Reset
Monolithic IC PST90XX Series
Outline
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 VS±2.5% max.
2. Super low current consumption I
CCH=1.5µA typ. ICCL=1µA 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 ······ PST9008)
Package
TO-92A (PST90 )
SOT-25A (PST90 N)
Applications
1. Reset circuits for microcomputers, CPU and MPU.
2. Reset circuit for logic circuitry.
3. Battery voltage check circuit.
4. Circuit for changing over to backup battery.
5. Level detecting circuit.
Pin Assignment
123
TO-92A
54
123
SOT-25A
1 VOUT
2 VCC
3 GND
Note : The pin 2 of SOT-25 package is a SUB terminal. Connect it to GND.
1 NC
2 SUB
3 GND
4 V
OUT
5 VCC
MITSUMI
System Reset PST90XX
Absolute Maximum Ratings
(Ta=25°C)
Electrical Characteristics
(Ta=25
°
C) (The unit of resistance is Ω unless otherwise indicated.)
Equivalent Circuit Diagram
Item Symbol Ratings Units
Storage temperature T
STG
-
40~+125
°
C
Operating temperature T
OPR
-
20~+75
°
C
Supply Voltage V
CC max.
-
0.3~10 V
Allowable loss Pd
150 (SOT-25A)
mW
300 (TO-92A)
Item Symbol
Measurement
Measurement conditions Min. Typ. Max. Unit
Circuit
PST9008 0.8
PST9009 0.9
PST9010 1.0
PST9011 1.1
R
L=4.7k PST9012
-
2.5%
1.2
+2.5%
Detection Voltage V
S 1VCC=H L PST9013
typ.
1.3
typ.
V
V
OL
<
=
0.4V PST9014 1.4
PST9015 1.5
PST9016 1.6
PST9017 1.7
PST9018 1.8
Hysteresis Voltage V
S 1
R
L=4.7kΩ VS VS typ. VS
mV
V
CC=L H L 0.5 0.05 2
Detection Voltage
V
S/ T 1
R
L=4.7kΩ
±0.01 %/
°
C
Temperature Coefficient Ta=
-
20°C~+75°C
Low Level
V
OL1
V
CC=Vs min.
-
0.02V
0.2 0.4 V
Output Voltage R
L=4.7kΩ
Output Leakage Current I
OH1 VCC=10V 0.1 µA
Circuit Current at On Time
ICCL 1
VCC=Vs min. -0.02V IOL=0mA
1.0 2.0 µA
Circuit Current at
I
CCH 1
Vs=0.8~1.2
VCC=1.5V, R
L
=∞
1.5 2.5 µA
OFF Time Vs=1.3~1.8
VCC=3.0V, R
L
=∞
"H" Transmission Delay Time
tpLH 2 CL=100pF, RL=4.7k 10 20 50 µS
"L" Transmission Delay Time
tpHL 2 CL=100pF, RL=4.7k 20 50 80 µS
Operating Threshold Voltage
VopL 1 RL=100k, VOL
<
=
0.4V 0.65 0.70 V
Output Current at
I
OL1 1
R
L=0
0.3 mA
On Time 1 V
CC=Vs min.
-
0.02V
Output Current at
I
OL2 1
V
CC=Vs min.
-
0.02V
0.2 mA
On Time 2 R
L=0, Ta=
-
20°C~+75°C
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