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
1. High Accuracy
2.
3.
4.
5.
6.
Ultra-low current consumption
Ultra-small package
Operating temperature range
Detecting voltage rank
Output configuration
±0.5% typ. / 2.0~6.0V
±0.8% typ. / 0.8~1.9V
0.25µA typ.
1.10×1.40mm (SSON-4)
-40~+105°C
0.8~6.0V (0.1V step)
PST81XX series ······ CMOS output
PST82XX series ······ Open drain output
Packages
SOT-25A
SC-82ABA
SC-82ABB
SSON-4
Applications
1.
2.
3.
4.
5.
Reset circuits for microcomputers, CPUs and MPUs
Reset circuits for logic circuits
Battery voltage check circuits
Back-up power supply switching circuits
Level detection circuits
• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
MITSUMI
IC for CMOS System Reset PST81XX, 82XX Series
Block Diagram
PST81XX
* 1 - 3 in the circuit diagram is pin number for the SOT-25A package.
V
DD
2
1
OUT
Vref
GND
3
: Protection Circuit
PST82XX
* 1 - 3 in the circuit diagram is pin number for the SOT-25A package.
V
DD
2
1
OUT
Vref
GND
3
: Protection Circuit
• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
MITSUMI
IC for CMOS System Reset PST81XX, 82XX Series
Pin Assignment
PST81XX, PST82XX
5
4
1
2
3
1
2
3
4
5
OUT
V
DD
GND
NC
NC
4
3
1
2
3
4
OUT
GND
NC
V
DD
1
2
SOT-25A
(TOP VIEW)
SSON-4
(TOP VIEW)
4
3
1
2
1
2
3
4
OUT
V
DD
NC
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
NC
NC
Functions
Reset Signal Output Pin
V
DD
Pin / Voltage Detect Pin
GND Pin
No Connection
No Connection
PST81XXRX, PST82XXRX (SSON-4)
Pin No.
1
2
3
4
Pin name
OUT
GND
NC
V
DD
GND Pin
No Connection
V
DD
Pin / Voltage Detect Pin
Functions
Reset Signal Output Pin
PST81XXUX, PST82XXUX (SC-82ABA/-82ABB)
Pin No.
1
2
3
4
Pin name
OUT
V
DD
NC
GND
Functions
Reset Signal Output Pin
V
DD
Pin / Voltage Detect Pin
No Connection
GND Pin
• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
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)
Power Dissipation
Operating temperature
Storage temperature
Symbol
V
DD
max.
OUT
I
DD
I
OUT
P
D
T
OPR
T
STG
Ratings
- 0.3~+12.0
- 0.3~(V
DD
+0.3)
20
20
150 (SOT−25A, SC−82AB)
330 (SSON−4)(note)
- 40~+105
- 65~+150
Units
V
V
mA
mA
mW
°C
°C
PST82XX
Item
Supply voltage
Output voltage
Input current (V
DD
)
Output current (RESET, RESET)
Power Dissipation
Operating temperature
Storage temperature
Symbol
V
DD
max.
OUT
I
DD
I
OUT
P
D
T
OPR
T
STG
Ratings
- 0.3~+12.0
- 0.3~+12.0
20
20
150 (SOT−25A, SC−82AB)
330 (SSON−4)(note)
- 40~+105
- 65~+150
Units
V
V
mA
mA
mW
°C
°C
note : With PC board of glass epoxy. (The tab pin is not connected with PC board.)
PC board size of 110×40×0.8mm
Recommended Operating Conditions
Item
Operating temperature
Supply voltage
Symbol
T
OPR
V
DD
Ratings
- 40~+105
0.70~10.0
Units
°C
V
• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
MITSUMI
IC for CMOS System Reset PST81XX, 82XX Series
Electrical Characteristics
PST81XX
Item
Supply current
Symbol
I
DD
V
TH
V
TH
V
TH
/°C
t
PHL
t
PLH
I
OL1
I
OL2
"L" output current
I
OL3
I
OL4
"H" output current
I
OH1
I
OH2
(Except where noted otherwise Ta=25°C)
Reset threshold
Reset threshold hysteresis
Reset threshold temp. coefficient
L transfer delay time
H transfer delay time
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
−0.5%
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
V
TH
V
TH
V
TH
/°C
t
PHL
t
PLH
I
OL1
I
OL2
"L" output current
I
OL3
I
OL4
Output leakage current
Ileak
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
=10V, OUT=10V
Max. Units
1.0
µA
V
TH
+0.8%
V
TH
−0.8%
V
TH
V
TH
−2.5%
V
TH
+2.5%
0.8~
V
V
TH
−0.5%
V
TH
+0.5%
6.0V
V
TH
−2.5% (0.1Vstep) V
TH
+2.5%
V
TH
0.03
V
TH
0.08
V
±100
ppm/°C
100
µs
100
µs
0.01
0.10
0.23
1.60
3.20
2.00
8.00
12.0
0.1
µA
(3)
mA
(3)
Min.
Typ.
0.25
Circuit
(1)
(2)
(2)
(2)
(4)
(4)
Reset threshold
Reset threshold hysteresis
Reset threshold temp. coefficient
L transfer delay time
H transfer delay time
note1 : This device is tested at Ta=25°C, over temperature limits guaranteed by design only.
note2 : The parameter is guaranteed by design.
• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.
• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.
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