ETC PST9008N

System Reset PST90XX
MITSUMI
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
ICCH=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
1
2
1
VOUT
2
VCC
3
GND
5
1
4
2
3
3
SOT-25A
(TOP VIEW)
Note : The pin 2 of SOT-25 package is a SUB terminal. Connect it to GND.
TO-92A
1
NC
2
SUB
3
GND
4
VOUT
5
VCC
System Reset PST90XX
MITSUMI
Equivalent Circuit Diagram
Absolute Maximum Ratings
(Ta=25°C)
Item
Storage temperature
Operating temperature
Supply Voltage
Symbol
TSTG
TOPR
VCC max.
Allowable loss
Pd
Electrical Characteristics
Item
Detection Voltage
Hysteresis Voltage
Symbol
VS
VS
Detection Voltage
VS/ T
Temperature Coefficient
Low Level
VOL
Output Voltage
Output Leakage Current IOH
Circuit Current at On Time
ICCL
Circuit Current at
ICCH
OFF Time
"H" Transmission Delay Time tpLH
"L" Transmission Delay Time tpHL
Operating Threshold Voltage VopL
Output Current at
IOL1
On Time 1
Output Current at
IOL2
On Time 2
Ratings
-40~+125
-20~+75
-0.3~10
150 (SOT-25A)
300 (TO-92A)
Units
°C
°C
V
mW
(Ta=25°C) (The unit of resistance is Ω unless otherwise indicated.)
Measurement
Circuit
1
1
1
1
1
1
1
2
2
1
1
1
Measurement conditions
RL=4.7k
VCC=H L
VOL <= 0.4V
PST9008
PST9009
PST9010
PST9011
PST9012
PST9013
PST9014
PST9015
PST9016
PST9017
PST9018
RL=4.7k
VCC=L H L
RL=4.7k
Ta=-20°C~+75°C
VCC=Vs min. -0.02V
RL=4.7k
VCC=10V
VCC=Vs min. -0.02V IOL=0mA
Vs=0.8~1.2
VCC=1.5V, RL=∞
VCC=3.0V, RL=∞
Vs=1.3~1.8
CL=100pF, RL=4.7k
CL=100pF, RL=4.7k
RL=4.7k, VOL =< 0.4V
RL=0
VCC=Vs min. -0.02V
VCC=Vs min. -0.02V
RL=0, Ta=-20°C~+75°C
Min.
Typ.
Max.
0.8
0.9
1.0
1.1
1.2
-2.5%
+2.5%
1.3
typ.
typ.
1.4
1.5
1.6
1.7
1.8
VS VS typ.
VS
0.5
0.05
2
V
mV
%/°C
±0.01
10
20
Unit
0.2
0.4
V
1.0
0.1
2.0
µA
µA
1.0
2.0
µA
20
50
0.65
50
80
0.70
µs
µs
V
0.3
mA
0.2
mA
System Reset PST90XX
MITSUMI
Equivalent Circuit
Characteristics
(Example: PST9008)
VS vs. Ta
VS
(V)
ICCL vs. Ta
0.83
3
0.82
2.5
0.81
2
0.80
ICCL 1.5
(µA)
0.79
1
0.78
0.77
0.5
Ta
VS
(mV)
Ta (°C)
VOpL vs. Ta
VopL
(V)
-20-10 0 10 20 30 40 50 60 70
Ta
(°C)
ICCH vs. Ta
3
2.5
2
ICCH 1.5
(µA)
1
0.5
0
-20-10 0 10 20 30 40 50 60 70
(°C)
VS vs. Ta
70
60
50
40
30
20
10
0
0
-20-10 0 10 20 30 40 50 60 70
-20-10 0 10 20 30 40 50 60 70
Ta (°C)
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-20-10 0 10 20 30 40 50 60 70
Ta (°C)