MITSUMI
IC for CMOS System Reset PST4X6MXXXN, PST4X6NXXXU
IC for CMOS System Reset
Monolithic IC PST4X6MXXXN, PST4X6NXXXU Series
Outline
This system reset IC was developed using the CMOS process. Ultra-low current consumption of 0.5µA typ.
has been realized through use of the CMOS process. Also, the built-in fixed delay timer provides accurate
reset by detecting power supply voltage during power on and power interruptions.
Features
1 Detection voltage precision
2 Low current consumption
3 Hysteresis
±1.5%
0.5µA
6.3mV typ. (VTH
≤
3.08V)
9.5mV typ. (VTH
≥
3.08V)
4 External capacitor for delay timer not needed. Built-in delay timer
185ms
5 Full rank variations available for detection voltage, package and output configurations.
6 Operating temperature range suitable for car devices
-40~+105˚C
Package
SOT-23 (PST4X6MXXXN Series)
SC-70 (PST4X6NXXXU Series)
Applications
1. Reset circuits in microcomputers, CPUs and MPUs.
2. Logic circuit reset circuits.
3. Battery voltage check
4. Switching circuits for back-up circuits.
5. Level detection circuits.
6. Mechanical reset circuits
Pin Assignment
PST4
M
N
PST4
N
U
3
1
2
1
2
3
GND
RESET
RESET
V
DD
3
1
2
1
2
3
GND
RESET
RESET
V
DD
SOT-23A
SC-70A
MITSUMI
IC for CMOS System Reset PST4X6MXXXN, PST4X6NXXXU
Block Diagram
PST416M
N
PST436M
N
Push-Pull / Active-Low Output Type
V
DD
Push-Pull / Active-High Output Type
V
DD
RESET
GENERATOR
RESET
RESET
GENERATOR
RESET
GND
GND
PST426M
N
Open-Drain / Active-Low Output Type
V
DD
RESET
RESET
GENERATOR
GND
PST416N
U
PST436N
U
Push-Pull / Active-Low Output Type
V
DD
Push-Pull / Active-High Output Type
V
DD
RESET
GENERATOR
RESET
RESET
GENERATOR
RESET
GND
GND
PST426N
U
Open-Drain / Active-Low Output Type
V
DD
RESET
RESET
GENERATOR
GND
MITSUMI
IC for CMOS System Reset PST4X6MXXXN, PST4X6NXXXU
Model Name
PST4
a
6M
b
N
c
b
V
TH
RANK
c
Housing
a
OUTPUT TYPE
Push-Pull
Active-Low
Open-Drain
Active-Low
Push-Pull
Active-High
1
2
3
220···V
TH
=2.20V
463···V
TH
=4.63V
~
~
R : Right Housing
L : Left Housing
PST4
a
6N
b
U
c
b
V
TH
RANK
c
Housing
a
OUTPUT TYPE
Push-Pull
Active-Low
Open-Drain
Active-Low
Push-Pull
Active-High
1
2
3
220···V
TH
=2.20V
463···V
TH
=4.63V
~
~
R : Right Housing
L : Left Housing
Pin Explanations
Pin No.
1
2
3
Pin Name
GND
RESET/RESET
V
DD
GND Pin
Reset Signal Output Pin
Power Supply Pin/Voltage Detect Pin
Function
Absolute Maximum Ratings
Item
Operating Temperature
Storage Temperature
Supply Voltage
Output Voltage
Input Current (V
DD
)
Output Current
Power Dissipation
Symbol
T
OPR
T
STG
V
DD
max.
RESET/RESET
I
DD
I
OUT
P
D
Rating
-40~+85
-60~+150
-0.3~+6.0
-0.3~(Vcc+0.3) (Push-Pull Type)
-0.3~+6.0 (Open Drain Type)
20
20
150 (Alone)
mA
mA
mW
Unit
°C
°C
V
V
Recommended Operating Conditions
Item
Operating Temperature
Supply Voltage
Symbol
T
OPR
V
DD
Rating
-40~+85
1.0~5.5 (Ta=0~+70°C)
1.2~5.5 (Ta=-40~+85°C)
Unit
°C
V
MITSUMI
IC for CMOS System Reset PST4X6MXXXN, PST4X6NXXXU
Electrical Characteristics
Item
(V
DD
=full range, Ta=-40~+85°C, Ta=+25°C, V
DD
=3V.)
Symbo
I
DD
Test Conditions
V
TH
< 3.08V only, V
DD
=3.0V for V
TH
> 2.93V
=
V
DD
=3.2V for V
TH
> 2.93, no load
V
DD
=5.5V, no load
Ta=+25˚C
Ta=-40~+85˚C
V
DD
=V
TH
~(V
TH
-100mV) 2
Min. Typ. Max. Unit Circuit
-
-
0.5
1.0
1.0
1.75
V
ppm/˚C
µs
ms
V
1
1
5
5
4
µA
2
Supply Current
Reset Threshold
Reset Threshold Temp. Coefficient
V
DD
to Reset Delay
Reset Active Timeout Period
RESET Output Voltage
(PST416M/PST426M, PST416N/PST426N)
RESET Output Voltage
(PST416M, PST416N)
V
TH
V
TH
/˚C
T
RD
T
RP
V
OL
V
TH
-1.5% V
TH
V
TH
+1.5%
V
TH
-2.5% V
TH
V
TH
+2.5%
-
30
20
185
-
-
-
-
-
-
-
-
-
-
6.3
9.5
-
-
-
280
0.3
0.4
-
-
-
-
-
0.3
0.4
0.4
-
-
0.1
-
100
-
-
0.8 V
DD
0.8 V
DD
0.8 V
DD
0.8 V
DD
0.8 V
DD
-
-
-
-
-
-
*
I
SINK
=1.6mA, V
DD
> 2.1V
I
SINK
=100µA,V
DD
> 1.2V
=
I
SOURCE
=500µA, V
DD
=3.2V
I
SOURCE
=800µA, V
DD
=4.5V, V
TH
< 4.38V
=
I
SOURCE
=800µA, V
DD
=V
TH
max., V
TH
> 4.5V
=
I
SOURCE
=500µA, V
DD
> 2.1V
=
I
SOURCE
=50µA, V
DD
> 1.2V
=
I
SINK
=1.2mA, V
DD
> 3.2V
=
I
SINK
=3.2mA, V
DD
> 4.5V, V
TH
< 4.38V
=
=
I
SINK
=3.2mA, V
DD
=V
TH
max., V
TH
> 4.5V
=
V
TH
< 3.08V
=
V
TH
> 3.30V
=
V
OH
V
3
V
OH
RESET Output Voltage
(PST436M, PST436N)
V
OL
V
3
V
4
Hysteresis Voltage
Output Leakage Current
(PST426M, PST426N)
mV
µA
1
-
Note : 1 This device is tested at Ta=25˚C, over temperature limits guaranteed by design only.
Note : 2 The parameter is guaranteed by design.
*
*
MITSUMI
IC for CMOS System Reset PST4X6MXXXN, PST4X6NXXXU
Electrical Characteristics
Reset Threshold List
Reset Threshold (V)
Model
PST4
M220N
PST4
M232N
PST4
M240N
PST4
M250N
PST4
M263N
PST4
M270N
PST4
M280N
PST4
M293N
PST4
M300N
PST4
M308N
PST4
M330N
PST4
M340N
PST4
M350N
PST4
M360N
PST4
M370N
PST4
M380N
PST4
M390N
PST4
M400N
PST4
M410N
PST4
M420N
PST4
M430N
PST4
M438N
PST4
M450N
PST4
M463N
PST4
M220N
PST4
M232N
PST4
M240N
PST4
M250N
PST4
M263N
PST4
M270N
PST4
M280N
PST4
M293N
PST4
M300N
PST4
M308N
PST4
M330N
PST4
M340N
PST4
M350N
PST4
M360N
PST4
M370N
PST4
M380N
PST4
M390N
PST4
M400N
PST4
M410N
PST4
M420N
PST4
M430N
PST4
M438N
PST4
M450N
PST4
M463N
Min.
2.167
2.285
2.364
2.462
2.591
2.660
2.758
2.886
2.955
3.034
3.250
3.349
3.447
3.546
3.644
3.743
3.841
3.940
4.038
4.137
4.235
4.314
4.432
4.560
2.167
2.285
2.364
2.462
2.591
2.660
2.758
2.886
2.955
3.034
3.250
3.349
3.447
3.546
3.644
3.743
3.841
3.940
4.038
4.137
4.235
4.314
4.432
4.560
Ta=+25˚C
Typ.
2.200
2.320
2.400
2.500
2.630
2.700
2.800
2.930
3.000
3.080
3.300
3.400
3.500
3.600
3.700
3.800
3.900
4.000
4.100
4.200
4.300
4.380
4.500
4.630
2.200
2.320
2.400
2.500
2.630
2.700
2.800
2.930
3.000
3.080
3.300
3.400
3.500
3.600
3.700
3.800
3.900
4.000
4.100
4.200
4.300
4.380
4.500
4.630
Max.
2.233
2.355
2.436
2.537
2.669
2.741
2.842
2.974
3.045
3.126
3.350
3.451
3.552
3.654
3.755
3.857
3.958
4.060
4.161
4.263
4.364
4.446
4.567
4.699
2.233
2.355
2.436
2.537
2.669
2.741
2.842
2.974
3.045
3.126
3.350
3.451
3.552
3.654
3.755
3.857
3.958
4.060
4.161
4.263
4.364
4.446
4.567
4.699
Ta=-40~+85˚C
Min.
Max.
2.145
2.250
2.262
2.375
2.340
2.460
2.437
2.562
2.564
2.696
2.633
2.768
2.730
2.870
2.857
3.000
2.925
3.075
3.003
3.150
3.217
3.383
3.315
3.485
3.412
3.587
3.510
3.690
3.607
3.792
3.705
3.895
3.802
3.997
3.900
4.100
3.997
4.202
4.095
4.305
4.192
4.407
4.270
4.489
4.387
4.612
4.514
4.746
2.145
2.250
2.262
2.375
2.340
2.460
2.437
2.562
2.564
2.696
2.633
2.768
2.730
2.870
2.857
3.000
2.925
3.075
3.003
3.150
3.217
3.383
3.315
3.485
3.412
3.587
3.510
3.690
3.607
3.792
3.705
3.895
3.802
3.997
3.900
4.100
3.997
4.202
4.095
4.305
4.192
4.407
4.270
4.489
4.387
4.612
4.514
4.746
Reset Threshold
Hysteresis (mV)
Ta=-40~+85˚C
Typ.
6.3
9.5
6.3
9.5
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