MITSUMI
IC for CMOS System Reset PST81XX, 82XX Series
IC for CMOS System Reset
Monolithic IC PST81XX, 82XX Series
Outline
This IC functions in a variety of CPU systems and other logic systems, to detect supply voltage and reset the
system accurately when the power is turned on or interrupted.
To ±1.5% of detection voltage accuracy of the conventional models, a maximum of ±0.5% of super-high
precision is realized, and it is more suitable for battery detection etc. Moreover, the mounting area
significantly contributes to space saving using the SSON package.
Features
V
TH
±0.5%/2.0~6.0V
V
TH
±0.8%/0.8~1.9V
2. Ultra-low current consumption 0.25µA typ.
3. Ultra-small package
1.10 1.40mm (SSON-4A)
4. Operating temperature range
-40~+105°C
5. Detecting voltage rank
0.8~6.0V (0.1V step)
6. Output configuration
PST81XX series ······ CMOS output
PST82XX series ······ Open drain output
1. Ultra-high accuracy
Packages
SOT-25A
SC-82ABA
SC-82ABB
SSON-4A
Applications
1. Reset circuits for microcomputers, CPUs and MPUs
2. Reset circuits for logic circuits
3. Battery voltage check circuits
4. Back-up power supply switching circuits
5. Level detection circuits
MITSUMI
IC for CMOS System Reset PST81XX, 82XX Series
Block Diagram
PST81XXNX, PST81XXRX, PST81XXUX
(SOT-25A)
(SSON-4A)
(SC-82ABA/-82ABB)
V
DD
2
1
OUT
Vref
GND
3
PST82XXNX, PST82XXRX, PST82XXUX
(SOT-25A)
(SSON-4A)
(SC-82ABA/-82ABB)
V
DD
2
1
OUT
Vref
GND
3
MITSUMI
IC for CMOS System Reset PST81XX, 82XX Series
Pin Assignment
PST81XX, PST82XX
4
3
5
4
1
2
3
1
2
3
4
5
OUT
V
DD
GND
N.C
N.C
1
2
3
4
OUT
GND
N.C
V
DD
1
2
SOT-25A
(TOP VIEW)
SSON-4A
(TOP VIEW)
4
3
1
2
1
2
3
4
OUT
V
DD
N.C
GND
SC-82ABA
SC-82ABB
(TOP VIEW)
Pin Description
PST81XXNX, PST82XXNX (SOT-25A)
Pin No.
1
2
3
4
5
Pin name
OUT
V
DD
GND
N.C
N.C
Functions
Reset Signal Output Pin
V
DD
Pin / Voltage Detect Pin
GND Pin
No Connection
No Connection
PST81XXRX, PST82XXRX (SSON-4A)
Pin No.
1
2
3
4
Pin name
OUT
GND
N.C
V
DD
Functions
Reset Signal Output Pin
GND Pin
No Connection
V
DD
Pin / Voltage Detect Pin
PST81XXUX, PST82XXUX (SC-82ABA/-82ABB)
Pin No.
1
2
3
4
Pin name
OUT
V
DD
N.C
GND
Functions
Reset Signal Output Pin
V
DD
Pin / Voltage Detect Pin
No Connection
GND Pin
MITSUMI
IC for CMOS System Reset PST81XX, 82XX Series
Absolute Maximum Ratings
PST81XX
Item
Supply voltage
Output voltage
Input current (V
DD
)
Output current (RESET, RESET)
Operating temperature
Storage temperature
Symbol
V
DD max
OUT
I
DD
I
OUT
T
OPR
T
STG
Ratings
-0.3~+12.0
-0.3~(V
DD
+0.3)
20
20
-40~+105
-65~+150
Units
V
V
mA
mA
°C
°C
PST82XX
Item
Supply voltage
Output voltage
Input current (V
DD
)
Output current (RESET, RESET)
Operating temperature
Storage temperature
Symbol
V
DD max
OUT
I
DD
I
OUT
T
OPR
T
STG
Ratings
-0.3~+12.0
-0.3~+12.0
20
20
-40~+105
-65~+150
Units
V
V
mA
mA
°C
°C
Recommended Operating Conditions
Item
Operating temperature
Supply voltage
Symbol
T
OPR
V
DD
Ratings
-40~+105
+0.7~+10.0
Units
°C
V
MITSUMI
IC for CMOS System Reset PST81XX, 82XX Series
Electrical Characteristics
PST81XX
Item
Supply current
Symbol
I
DD
(Except where noted otherwise Ta=25°C)
Reset threshold
V
TH
Reset threshold hysteresis
Reset threshold temp. coefficient
L transfer delay time
H transfer delay time
V
TH
V
TH
/°C
t
PHL
t
PLH
I
OL1
I
OL2
"L" output curren
I
OL3
I
OL4
"H" output current
I
OH1
I
OH2
Measurement conditions
V
DD
=V
TH
+1V
Ta=+25°C V
TH
< 1.9V
=
Ta=-40~+85°C (note1)
Ta=+25°C V
TH
> 2.0V
=
Ta=-40~+85°C (note1)
V
DD
=0V V
TH
+1V 0V
Ta=-40~+85°C (note1)
V
DD
=V
TH
+0.4V V
TH
-0.4V (note2)
V
DD
=V
TH
-0.4V V
TH
+0.4V (note2)
V
DD
=0.7V, V
DS
=0.05V
V
DD
=1.2V, V
DS
=0.5V
V
TH
> 1.3V
V
DD
=2.4V, V
DS
=0.5V
V
TH
> 2.5V
V
DD
=3.6V, V
DS
=0.5V
V
TH
> 3.7V
V
DD
=4.8V, V
DS
=0.5V, V
TH
< 4.7V
V
DD
=6.1V, V
DS
=0.5V, V
TH
< 5.9V
Min.
V
TH
-0.8%
V
TH
-2.5%
V
TH
v0.5%
V
TH
-2.5%
V
TH
0.03
Typ.
0.25
V
TH
0.8~
6.0V
(0.1Vstep)
±100
Max. Units
1.0
µA
V
TH
+0.8%
V
TH
+2.5%
V
V
TH
+0.5%
V
TH
+2.5%
V
TH
0.08
V
ppm/°C
100
µs
100
µs
Circuit
(1)
(2)
(2)
(2)
(5)
(5)
0.01
0.23
1.60
3.20
0.36
0.46
0.10
2.00
8.00
12.0
0.62
0.75
mA
(4)
mA
(3)
note1 : This device is tested at Ta=25°C, over temperature limits guaranteed by design only.
note2 : The parameter is guaranteed by design.
PST82XX
Item
Supply current
Symbol
I
DD
Measurement conditions
Min.
Typ.
Max. Units
V
DD
=V
TH
+1V
0.25
1.0
µA
Ta=+25°C V
TH
< 1.9V
V
TH
-0.8%
V
TH
V
TH
+0.8%
=
Ta=-40~+85°C (note1)
V
TH
-2.5%
0.8~
V
TH
+2.5%
V
Ta=+25°C V
TH
> 2.0V
V
TH
-0.5%
6.0V
V
TH
+0.5%
=
Ta=-40~+85°C (note1)
V
TH
-2.5% (0.1Vstep) V
TH
+2.5%
V
DD
=0V V
TH
+1V 0V
V
TH
0.03
V
TH
0.08 V
Ta=-40~+85°C (note1)
±100
ppm/°C
V
DD
=V
TH
+0.4V V
TH
-0.4V (note2)
100
µs
V
DD
=V
TH
-0.4V V
TH
+0.4V (note2)
100
µs
V
DD
=0.7V, V
DS
=0.05V
0.01
0.10
V
DD
=1.2V, V
DS
=0.5V
0.23
2.00
V
TH
> 1.3V
V
DD
=2.4V, V
DS
=0.5V
mA
1.60
8.00
V
TH
> 2.5V
V
DD
=3.6V, V
DS
=0.5V
3.20
12.0
V
TH
> 3.7V
V
DD
=10V, OUT=10V
0.1
µA
Circuit
(1)
Reset threshold
V
TH
(2)
Reset threshold hysteresis
Reset threshold temp. coefficient
L transfer delay time
H transfer delay time
V
TH
V
TH
/°C
t
PHL
t
PLH
I
OL1
I
OL2
(2)
(2)
(4)
(4)
"L" output curren
I
OL3
I
OL4
(3)
Output leakage current
Ireak
(3)
note1 : This device is tested at Ta=25°C, over temperature limits guaranteed by design only.
note2 : The parameter is guaranteed by design.
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