MITSUMI
CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
CMOS System Reset IC with Delay Time Circuit
Monolithic IC PST83XX, 84XX Series
Outline
May 21, 2009
In various CPU systems or other logic systems, when the time of a power supply injection and a power supply are
severed for a moment, this IC detects supply voltage and applies reset to a system.
To ±1.5% of detection voltage accuracy of the conventional product, a maximum of ±0.5% of super-high precision
is realized, and it is more suitable for battery detection etc. The accuracy from elegance is conventionally raised from
+100/-50% to ±10% also about delay resistance.
Moreover, the component-side product is realizing the small space using SSON-4.
Features
1. High accuracy
2.
3.
4.
5.
6.
Super low supply current
Component-side product
Operating-temperature range
Delay resistance accuracy
Detecting voltage rank
±0.5% typ. / 2.0~6.0V
±0.8% typ. / 0.8~1.9V
0.35µA typ.
1.10×1.40mm (SSON-4)
-40~+105°C
10MΩ±10%
0.8~6.0V (0.1V step)
Packages
SSON-4
SOT-25A
SC-82AB
Applications
1.
2.
3.
4.
5.
Reset circuits for CPUs and MPUs
Reset circuits for logic circuits
Battery voltage check circuits
Back-up power supply switching circuits
Level detection circuits
MITSUMI
CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Block Diagram
PST83XX
* 1 - 4 in the circuit diagram is pin number for the SSON-4 package.
V
DD
4
R
D
2 OUT
Vref
GND 1
3
C
D
: Protection Circuit
PST84XX
* 1 - 4 in the circuit diagram is pin number for the SSON-4 package.
V
DD
4
R
D
2
OUT
Vref
GND
1
3
C
D
: Protection Circuit
MITSUMI
CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Pin Assignment
PST83XX, PST84XX
4
3
5
4
1
2
3
1
2
3
4
5
OUT
V
DD
GND
NC
C
D
1
2
3
4
GND
OUT
C
D
V
DD
1
2
SOT-25A
(TOP VIEW)
SSON-4
(TOP VIEW)
4
3
1
2
1
2
3
4
GND
V
DD
C
D
OUT
SC-82AB
(TOP VIEW)
Pin Description
PST83XX, PST84XX (SOT-25A)
Pin No.
1
2
3
4
5
Pin name
OUT
V
DD
GND
NC
C
D
Functions
Reset Signal Output Pin
V
DD
Pin / Voltage Detect Pin
GND Pin
No Connection
Capacitor Connect Pin with Delay
PST83XX, PST84XX (SSON-4)
Pin No.
1
2
3
4
Pin name
GND
OUT
C
D
V
DD
GND Pin
Reset Signal Output Pin
Capacitor Connect Pin with Delay
V
DD
Pin / Voltage Detect Pin
Functions
PST83XX, PST84XX (SC-82AB)
Pin No.
1
2
3
4
Pin name
GND
V
DD
C
D
OUT
GND Pin
V
DD
Pin / Voltage Detect Pin
Capacitor Connect Pin with Delay
Reset Signal Output Pin
Functions
MITSUMI
CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Absolute Maximum Ratings
PST83XX
Item
Supply voltage
Output voltage
Input current (V
DD
)
Output current (RESET, RESET)
C
D
Pin Input voltage
Power dissipation
Operating temperature
Storage temperature
Symbol
V
DD
max.
OUT
I
DD
I
OUT
V
CD
P
D
T
OPR
T
STG
Ratings
- 0.3~+12.0
- 0.3~(V
DD
+0.3)
20
20
V
SS
- 0.3~+12.0
150 (SOT-25A, SC-82AB)
330 (SSON-4)(note)
- 40~+105
- 65~+150
Units
V
V
mA
mA
V
mW
°C
°C
PST84XX
Item
Supply voltage
Output voltage
Input current (V
DD
)
Output current (RESET, RESET)
C
D
pin Input voltage
Power dissipation
Operating temperature
Storage temperature
Symbol
V
DD
max.
OUT
I
DD
I
OUT
V
CD
P
D
T
OPR
T
STG
Ratings
- 0.3~+12.0
- 0.3~+12.0
20
20
V
SS
- 0.3~+12.0
150 (SOT-25A, SC-82AB)
330 (SSON-4)(note)
- 40~+105
- 65~+150
Units
V
V
mA
mA
V
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
MITSUMI
CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Electrical Characteristics
PST83XX
Item
Symbol
(Except where noted otherwise Ta=25°C)
Measurement conditions
Rank
8308
8309
8310
8311
8312
8313
8314
8315
8316
8317
8318
Reset threshold
V
TH
Ta=+25°C
Ta=-40~+85°C
8319
8320
8321
8322
8323
8324
8325
8326
8327
8328
8329
8330
Min.
0.7936
0.7800
0.8928
0.8775
0.9920
0.9750
1.0912
1.0725
1.1904
1.1700
1.2896
1.2675
1.3888
1.3650
1.4880
1.4625
1.5872
1.5600
1.6864
1.6575
1.7856
1.7550
1.8848
1.8525
1.9900
1.9500
2.0895
2.0475
2.1890
2.1450
2.2885
2.2425
2.3880
2.3400
2.4875
2.4375
2.5870
2.5350
2.6865
2.6325
2.7860
2.7300
2.8855
2.8275
2.9850
2.9250
Typ.
0.800
0.900
1.000
1.100
1.200
1.300
1.400
1.500
1.600
1.700
1.800
1.900
2.000
2.100
2.200
2.300
2.400
2.500
2.600
2.700
2.800
2.900
3.000
Max.
0.8064
0.8200
0.9072
0.9225
1.0080
1.0250
1.1088
1.1275
1.2096
1.2300
1.3104
1.3325
1.4112
1.4350
1.5120
1.5375
1.6128
1.6400
1.7136
1.7425
1.8144
1.8450
1.9152
1.9475
2.0100
2.0500
2.1105
2.1525
2.2110
2.2550
2.3115
2.3575
2.4120
2.4600
2.5125
2.5625
2.6130
2.6650
2.7135
2.7675
2.8140
2.8700
2.9145
2.9725
3.0150
3.0750
Units
Circuit
V
(2)
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