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
Features
1. High accuracy ±0.5% typ. / 2.0~6.0V
±0.8% typ. / 0.8~1.9V
2. Super low supply current 0.35µA typ.
3. Component-side product 1.10×1.40mm (SSON-4)
4. Operating-temperature range
-
40~+105°C
5. Delay resistance accuracy 10MΩ±10%
6. Detecting voltage rank 0.8~6.0V (0.1V step)
Packages
SSON-4
SOT-25A
SC-82AB
Applications
1. Reset circuits for 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
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.
May 21, 2009
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Block Diagram
VDD
GND
OUT
2
1
4
3
Vref
CD
RD
2
1
4
3
Vref
VDD
GND
CD
OUT
RD
PST84XX * 1 - 4 in the circuit diagram is pin number for the SSON-4 package.
PST83XX * 1 - 4 in the circuit diagram is pin number for the SSON-4 package.
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Pin Assignment
12
43
SSON-4
(TOP VIEW)
1GND
2OUT
3CD
4VDD
SOT-25A
(TOP VIEW)
4
2
5
31
1OUT
2VDD
3GND
4NC
5CD
SC-82AB
(TOP VIEW)
1
3
2
41GND
2VDD
3CD
4OUT
Pin Description
Pin No. Pin name Functions
1GND GND Pin
2VDD
V
DD
Pin / Voltage Detect Pin
3CD
Capacitor Connect Pin with Delay
4OUT Reset Signal Output Pin
PST83XX, PST84XX
Pin No. Pin name Functions
1GND GND Pin
2OUT Reset Signal Output Pin
3CD
Capacitor Connect Pin with Delay
4VDD
V
DD
Pin / Voltage Detect Pin
PST83XX, PST84XX (SSON-4)
Pin No. Pin name Functions
1OUT Reset Signal Output Pin
2VDD
V
DD
Pin / Voltage Detect Pin
3GND GND Pin
4NC No Connection
5CD
Capacitor Connect Pin with Delay
PST83XX, PST84XX (SOT-25A)
PST83XX, PST84XX (SC-82AB)
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Absolute Maximum Ratings
Item Symbol Ratings Units
Supply voltage VDD max.
-
0.3~+12.0 V
Output voltage OUT
-
0.3~(VDD+0.3) V
Input current (VDD)IDD 20 mA
Output current (RESET, RESET)
IOUT 20 mA
CD Pin Input voltage VCD VSS
-
0.3~+12.0 V
Power dissipation PD150 (SOT-25A, SC-82AB)
330 (SSON-4)(note) mW
Operating temperature TOPR
-
40~+105 °C
Storage temperature TSTG
-
65~+150 °C
Recommended Operating Conditions
Item Symbol Ratings Units
Operating temperature TOPR
-
40~+105 °C
Supply voltage VDD 0.70~10.0 V
PST83XX
Item Symbol Ratings Units
Supply voltage VDD max.
-
0.3~+12.0 V
Output voltage OUT
-
0.3~+12.0 V
Input current (VDD)IDD 20 mA
Output current (RESET, RESET)
IOUT 20 mA
CD pin Input voltage VCD VSS
-
0.3~+12.0 V
Power dissipation PD150 (SOT-25A, SC-82AB)
330 (SSON-4)(note) mW
Operating temperature TOPR
-
40~+105 °C
Storage temperature TSTG
-
65~+150 °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
PST84XX
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Electrical Characteristics (Except where noted otherwise Ta=25°C)
Item
Symbol Measurement conditions
Rank Min. Typ. Max.
Units
Circuit
Reset threshold VTH
Ta=+25°C
Ta=
-
40~+85°C
8308 0.7936 0.800 0.8064
V (2)
0.7800 0.8200
8309 0.8928 0.900 0.9072
0.8775 0.9225
8310 0.9920 1.000 1.0080
0.9750 1.0250
8311 1.0912 1.100 1.1088
1.0725 1.1275
8312 1.1904 1.200 1.2096
1.1700 1.2300
8313 1.2896 1.300 1.3104
1.2675 1.3325
8314 1.3888 1.400 1.4112
1.3650 1.4350
8315 1.4880 1.500 1.5120
1.4625 1.5375
8316 1.5872 1.600 1.6128
1.5600 1.6400
8317 1.6864 1.700 1.7136
1.6575 1.7425
8318 1.7856 1.800 1.8144
1.7550 1.8450
8319 1.8848 1.900 1.9152
1.8525 1.9475
8320 1.9900 2.000 2.0100
1.9500 2.0500
8321 2.0895 2.100 2.1105
2.0475 2.1525
8322 2.1890 2.200 2.2110
2.1450 2.2550
8323 2.2885 2.300 2.3115
2.2425 2.3575
8324 2.3880 2.400 2.4120
2.3400 2.4600
8325 2.4875 2.500 2.5125
2.4375 2.5625
8326 2.5870 2.600 2.6130
2.5350 2.6650
8327 2.6865 2.700 2.7135
2.6325 2.7675
8328 2.7860 2.800 2.8140
2.7300 2.8700
8329 2.8855 2.900 2.9145
2.8275 2.9725
8330 2.9850 3.000 3.0150
2.9250 3.0750
PST83XX
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Item
Symbol Measurement conditions
Rank Min. Typ. Max.
Units
Circuit
Reset threshold VTH
Ta=+25°C
Ta=
-
40~+85°C
8331 3.0845 3.1000 3.1155
V (2)
3.0225 3.1775
8332 3.1840 3.2000 3.2160
3.1200 3.2800
8333 3.2835 3.3000 3.3165
3.2175 3.3825
8334 3.3830 3.4000 3.4170
3.3150 3.4850
8335 3.4825 3.5000 3.5175
3.4125 3.5875
8336 3.5820 3.6000 3.6180
3.5100 3.6900
8337 3.6815 3.7000 3.7185
3.6075 3.7925
8338 3.7810 3.8000 3.8190
3.7050 3.8950
8339 3.8805 3.9000 3.9195
3.8025 3.9975
8340 3.9800 4.0000 4.0200
3.9000 4.1000
8341 4.0795 4.1000 4.1205
3.9975 4.2025
8342 4.1790 4.2000 4.2210
4.0950 4.3050
8343 4.2785 4.3000 4.3215
4.1925 4.4075
8344 4.3780 4.4000 4.4220
4.2900 4.5100
8345 4.4775 4.5000 4.5225
4.3875 4.6125
8346 4.5770 4.6000 4.6230
4.4850 4.7150
8347 4.6765 4.7000 4.7235
4.5825 4.8175
8348 4.7760 4.8000 4.8240
4.6800 4.9200
8349 4.8755 4.9000 4.9245
4.7775 5.0225
8350 4.9750 5.0000 5.0250
4.8750 5.1250
8351 5.0745 5.1000 5.1255
4.9725 5.2275
8352 5.1740 5.2000 5.2260
5.0700 5.3300
8353 5.2735 5.3000 5.3265
5.1675 5.4325
Electrical Characteristics (Except where noted otherwise Ta=25°C)
PST83XX
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Item
Symbol Measurement conditions
Rank Min. Typ. Max.
Units
Circuit
Reset threshold VTH
Ta=+25°C
Ta=
-
40~+85°C
8354 5.3730 5.4000 5.4270
V (2)
5.2650 5.5350
8355 5.4725 5.5000 5.5275
5.3625 5.6375
8356 5.5720 5.6000 5.6280
5.4600 5.7400
8357 5.6715 5.7000 5.7285
5.5575 5.8425
8358 5.7710 5.8000 5.8290
5.6550 5.9450
8359 5.8705 5.9000 5.9295
5.7525 6.0475
8360 5.9700 6.0000 6.0300
5.8500 6.1500
Reset threshold
hysteresis VTH VDD=0V VTH+1V 0V
8308 0.024 0.040 0.064
V (2)
8309 0.027 0.045 0.072
8310 0.030 0.050 0.080
8311 0.033 0.055 0.088
8312 0.036 0.060 0.096
8313 0.039 0.065 0.104
8314 0.042 0.070 0.112
8315 0.045 0.075 0.120
8316 0.048 0.080 0.128
8317 0.051 0.085 0.136
8318 0.054 0.090 0.144
8319 0.057 0.095 0.152
8320 0.060 0.100 0.160
8321 0.063 0.105 0.168
8322 0.066 0.110 0.176
8323 0.069 0.115 0.184
8324 0.072 0.120 0.192
8325 0.075 0.125 0.200
8326 0.078 0.130 0.208
8327 0.081 0.135 0.216
8328 0.084 0.140 0.224
8329 0.087 0.145 0.232
8330 0.090 0.150 0.240
8331 0.093 0.155 0.248
8332 0.096 0.160 0.256
8333 0.099 0.165 0.264
8334 0.102 0.170 0.272
8335 0.105 0.175 0.280
8336 0.108 0.180 0.288
8337 0.111 0.185 0.296
8338 0.114 0.190 0.304
8339 0.117 0.195 0.312
8340 0.120 0.200 0.320
Electrical Characteristics (Except where noted otherwise Ta=25°C)
PST83XX
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Item
Symbol
Measurement conditions Rank Min. Typ. Max. Units Circuit
Reset threshold
hysteresis V TH VDD=0V VTH+1V 0V
8341 0.123 0.205 0.328
V (2)
8342 0.126 0.210 0.336
8343 0.129 0.215 0.344
8344 0.132 0.220 0.352
8345 0.135 0.225 0.360
8346 0.138 0.230 0.368
8347 0.141 0.235 0.376
8348 0.144 0.240 0.384
8349 0.147 0.245 0.392
8350 0.150 0.250 0.400
8351 0.153 0.255 0.408
8352 0.156 0.260 0.416
8353 0.159 0.265 0.424
8354 0.162 0.270 0.432
8355 0.165 0.275 0.440
8356 0.168 0.280 0.448
8357 0.171 0.285 0.456
8358 0.174 0.290 0.464
8359 0.177 0.295 0.472
8360 0.180 0.300 0.480
Supply current IDD VDD=VTH+1V 8308
~ 8360 0.35 1.0 µA (1)
Reset threshold temp. coeffi cient
VTH/°C Ta=
-
40~+85°C 8308
~ 8360 ± 100 ppm/°C (2)
"L" transfer delay time
tPHL
VDD=VTH+0.4V
VTH
-
0.4V(note)
8308
~ 8360 2 15 100 µs (7)
"H" transfer delay time
tPLH
VDD=VTH
-
0.4V
VTH+0.4V(note)
8308
~ 8360 2 15 100 µs (7)
"L" output current
IOL1 VDD=0.7V, VDS=0.05V 8308
~ 8360 0.01 0.10
mA (3)
IOL2
VDD=1.2V, VDS=0.5V
VTH 1.3V
8313
~ 8360 0.23 2.00
IOL3
VDD=2.4V, VDS=0.5V
VTH 2.5V
8325
~ 8360 1.60 8.00
IOL4
VDD=3.6V, VDS=0.5V
VTH 3.7V
8337
~ 8360 3.20 12.0
"H" output current
IOH1
VDD=4.8V, VDS=0.5V
VTH 4.7V
8308
~ 8347 0.36 0.62
mA (4)
IOH2 VDD=6.1V, VDS=0.5V 8308
~ 8360 0.46 0.75
Electrical Characteristics (Except where noted otherwise Ta=25°C)
PST83XX
note : This parameter is guaranteed by design.
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Item
Symbol Measurement conditions
Rank Min. Typ. Max.
Units
Circuit
Reset threshold VTH
Ta=+25°C
Ta=
-
40~+85°C
8408 0.7936 0.800 0.8064
V (2)
0.7800 0.8200
8409 0.8928 0.900 0.9072
0.8775 0.9225
8410 0.9920 1.000 1.0080
0.9750 1.0250
8411 1.0912 1.100 1.1088
1.0725 1.1275
8412 1.1904 1.200 1.2096
1.1700 1.2300
8413 1.2896 1.300 1.3104
1.2675 1.3325
8414 1.3888 1.400 1.4112
1.3650 1.4350
8415 1.4880 1.500 1.5120
1.4625 1.5375
8416 1.5872 1.600 1.6128
1.5600 1.6400
8417 1.6864 1.700 1.7136
1.6575 1.7425
8418 1.7856 1.800 1.8144
1.7550 1.8450
8419 1.8848 1.900 1.9152
1.8525 1.9475
8420 1.9900 2.000 2.0100
1.9500 2.0500
8421 2.0895 2.100 2.1105
2.0475 2.1525
8422 2.1890 2.200 2.2110
2.1450 2.2550
8423 2.2885 2.300 2.3115
2.2425 2.3575
8424 2.3880 2.400 2.4120
2.3400 2.4600
8425 2.4875 2.500 2.5125
2.4375 2.5625
8426 2.5870 2.600 2.6130
2.5350 2.6650
8427 2.6865 2.700 2.7135
2.6325 2.7675
8428 2.7860 2.800 2.8140
2.7300 2.8700
8429 2.8855 2.900 2.9145
2.8275 2.9725
8430 2.9850 3.000 3.0150
2.9250 3.0750
Electrical Characteristics (Except where noted otherwise Ta=25°C)
PST84XX
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Item
Symbol
Measurement conditions
Rank Min. Typ. Max.
Units
Circuit
Reset threshold VTH
Ta=+25°C
Ta=
-
40~+85°C
8431 3.0845 3.1000 3.1155
V (2)
3.0225 3.1775
8432 3.1840 3.2000 3.2160
3.1200 3.2800
8433 3.2835 3.3000 3.3165
3.2175 3.3825
8434 3.3830 3.4000 3.4170
3.3150 3.4850
8435 3.4825 3.5000 3.5175
3.4125 3.5875
8436 3.5820 3.6000 3.6180
3.5100 3.6900
8437 3.6815 3.7000 3.7185
3.6075 3.7925
8438 3.7810 3.8000 3.8190
3.7050 3.8950
8439 3.8805 3.9000 3.9195
3.8025 3.9975
8440 3.9800 4.0000 4.0200
3.9000 4.1000
8441 4.0795 4.1000 4.1205
3.9975 4.2025
8442 4.1790 4.2000 4.2210
4.0950 4.3050
8443 4.2785 4.3000 4.3215
4.1925 4.4075
8444 4.3780 4.4000 4.4220
4.2900 4.5100
8445 4.4775 4.5000 4.5225
4.3875 4.6125
8446 4.5770 4.6000 4.6230
4.4850 4.7150
8447 4.6765 4.7000 4.7235
4.5825 4.8175
8448 4.7760 4.8000 4.8240
4.6800 4.9200
8449 4.8755 4.9000 4.9245
4.7775 5.0225
8450 4.9750 5.0000 5.0250
4.8750 5.1250
8451 5.0745 5.1000 5.1255
4.9725 5.2275
8452 5.1740 5.2000 5.2260
5.0700 5.3300
8453 5.2735 5.3000 5.3265
5.1675 5.4325
Electrical Characteristics (Except where noted otherwise Ta=25°C)
PST84XX
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Item
Symbol
Measurement conditions
Rank Min. Typ. Max.
Units
Circuit
Reset threshold VTH
Ta=+25°C
Ta=
-
40~+85°C
8454 5.3730 5.4000 5.4270
V (2)
5.2650 5.5350
8455 5.4725 5.5000 5.5275
5.3625 5.6375
8456 5.5720 5.6000 5.6280
5.4600 5.7400
8457 5.6715 5.7000 5.7285
5.5575 5.8425
8458 5.7710 5.8000 5.8290
5.6550 5.9450
8459 5.8705 5.9000 5.9295
5.7525 6.0475
8460 5.9700 6.0000 6.0300
5.8500 6.1500
Reset threshold
hysteresis VTH
V
DD
=0V V
TH
+1V 0V
8408 0.024 0.040 0.064
V (2)
8409 0.027 0.045 0.072
8410 0.030 0.050 0.080
8411 0.033 0.055 0.088
8412 0.036 0.060 0.096
8413 0.039 0.065 0.104
8414 0.042 0.070 0.112
8415 0.045 0.075 0.120
8416 0.048 0.080 0.128
8417 0.051 0.085 0.136
8418 0.054 0.090 0.144
8419 0.057 0.095 0.152
8420 0.060 0.100 0.160
8421 0.063 0.105 0.168
8422 0.066 0.110 0.176
8423 0.069 0.115 0.184
8424 0.072 0.120 0.192
8425 0.075 0.125 0.200
8426 0.078 0.130 0.208
8427 0.081 0.135 0.216
8428 0.084 0.140 0.224
8429 0.087 0.145 0.232
8430 0.090 0.150 0.240
8431 0.093 0.155 0.248
8432 0.096 0.160 0.256
8433 0.099 0.165 0.264
8434 0.102 0.170 0.272
8435 0.105 0.175 0.280
8436 0.108 0.180 0.288
8437 0.111 0.185 0.296
8438 0.114 0.190 0.304
8439 0.117 0.195 0.312
8440 0.120 0.200 0.320
Electrical Characteristics (Except where noted otherwise Ta=25°C)
PST84XX
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Item
Symbol Measurement conditions
Rank Min. Typ. Max. Units Circuit
Reset threshold
hysteresis VTH
V
DD
=0V V
TH
+1V 0V
8441 0.123 0.205 0.328
V (2)
8442 0.126 0.210 0.336
8443 0.129 0.215 0.344
8444 0.132 0.220 0.352
8445 0.135 0.225 0.360
8446 0.138 0.230 0.368
8447 0.141 0.235 0.376
8448 0.144 0.240 0.384
8449 0.147 0.245 0.392
8450 0.150 0.250 0.400
8451 0.153 0.255 0.408
8452 0.156 0.260 0.416
8453 0.159 0.265 0.424
8454 0.162 0.270 0.432
8455 0.165 0.275 0.440
8456 0.168 0.280 0.448
8457 0.171 0.285 0.456
8458 0.174 0.290 0.464
8459 0.177 0.295 0.472
8460 0.180 0.300 0.480
Supply current IDD VDD=VTH+1V 8408
~ 8460 0.35 1.0 µA (1)
Reset threshold temp. coeffi cient
V
TH
/°C
Ta=
-
40~+85°C 8408
~ 8460 ±100
ppm/°C
(2)
"L" transfer delay time
tPHL
VDD=VTH+0.4V
VTH
-
0.4V(note)
8408
~ 8460 2 15 100 µs (6)
"H" transfer delay time
tPLH
VDD=VTH
-
0.4V
VTH+0.4V(note)
8408
~ 8460 2 15 100 µs (6)
"L" output current
IOL1 VDD=0.7V, VDS=0.05V 8408
~ 8460 0.01 0.10
mA (3)
IOL2
VDD=1.2V, VDS=0.5V
VTH 1.3V
8413
~ 8460 0.23 2.00
IOL3
VDD=2.4V, VDS=0.5V
VTH 2.5V
8425
~ 8460 1.60 8.00
IOL4
VDD=3.6V, VDS=0.5V
VTH 3.7V
8437
~ 8460 3.20 12.0
Output leakage current
Ileak
V
DD
=10V, OUT=10V
8408
~ 8460 0.1 µA (3)
Electrical Characteristics (Except where noted otherwise Ta=25°C)
PST84XX
note : This parameter is guaranteed by design.
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Item
Symbol
Test Condition Rank Min. Typ. Max. Units Circuit
Cd pin resistance RD8308
~ 8360 91011M
Ω(6)
Cd pin threshold
voltage VTCD VDD=VTH 1.1V 8308
~ 8360
V
DD
0.3 V
DD
0.5 V
DD
0.7
V (5)
Cd pin output
current1 ICD1 VDS=0.1V
VDD=0.7V
8308
~ 8360 2.0 30.0 µA (6)
Cd pin output
current2 ICD2
VDS=0.5V
VDD=0.8V(Rank08~10)
VDD=1.0V(Rank11~15)
VDD=1.5V(Rank16~60)
8308
~ 8310 10 100
µA (6)
8311
~ 8315 50 200
8316
~ 8360 200 800
Electrical Characteristics 2 (Except where noted otherwise Ta=25°C)
PST83XX
note : This device is tested at Ta=25°C, over temperature limits guaranteed by desigh only.
PST84XX
Item
Symbol
Test Condition Rank Min. Typ. Max. Units Circuit
Cd pin resistance RD8408
~ 8460 91011M
Ω(5)
Cd pin threshold
voltage VTCD VDD=VTH 1.1V 8408
~ 8460
V
DD
0.3 V
DD
0.5 V
DD
0.7
V (4)
Cd pin output
current1 ICD1VDS=0.1V
VDD=0.7V
8408
~ 8460 2.0 30.0 µA (5)
Cd pin output
current2 ICD2
VDS=0.5V
VDD=0.8V(Rank08~10)
VDD=1.0V(Rank11~15)
VDD=1.5V(Rank16~60)
8408
~ 8410 10 100
µA (5)
8411
~ 8415 50 200
8416
~ 8460 200 800
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Measuring Circuit
4
1
23
VDD
GND
VIN
IDD
PST
83XX
(1)
VDD
GND
OUT
2
3
1
4
VIN PST
83XX
(2)
23
1
4VDD
GND
VIN
OUT
VDS
IOUT
PST
83XX
(3)
23
1
4VDD
GND
VIN
OUT
VDS
IOUT
PST
83XX
(4)
2
3
4
1
VDD
GND
VIN
OUT
VDS
CDPST
83XX
(5)
2
3
4
1
VDD
GND
VIN
VDS CD
ICD PST
83XX
(6)
1
4
23
VDD
GND
VIN
OUT
CD
CDPST
83XX
(7)
VTH+0.4V
GND
100%
50%
GND
VTH- 0.4V
VTH
Input Voltage
Output Voltage
PST83XX * 1 - 4 in the circuit diagram is pin number for the SSON-4 package.
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
4
1
23
VDD
GND
VIN
IDD
PST
84XX
(1)
470k
VDD
GND
OUT
2
3
1
4
VIN PST
84XX
(2)
23
1
4VDD
GND
VIN
OUT
VDS
IOUT
PST
84XX
(3)
2
3
4
1
VDD
GND
VIN
OUT
VDS
CDPST
84XX
470k
(4)
2
3
4
1
VDD
GND
VIN
VDS CD
ICD PST
84XX
(5)
1
4
23
VDD
GND
VIN
OUT
CD
CDPST
84XX
470k
(6)
VTH+0.4V
GND
100%
50%
GND
VTH- 0.4V
VTH
Input Voltage
Output Voltage
PST84XX * 1 - 4 in the circuit diagram is pin number for the SSON-4 package.
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Timing Chart
Supply voltage
Detect voltage(VTH+ VTH)
Capacitor voltage Threshold voltage(VTCD)
GND
Output voltage
GND
Delay time(tD)
t
t
VTH
VTH+ VTH
VTH
tPLH
tPHL
V
V
VDD
OUT
Delay time (tD) tD = 0.69×RD×CD(F) (s) RD : CD pin resistance
C
D : Capacitor
MITSUMI CMOS System Reset IC with Delay Time Circuit PST83XX, 84XX Series
Application Circuits
Logic
System
RESET
OUT
VDD
GND
VDD
CD
VIN
1
23
4
PST
83XX
Logic
System
RESET
OUT
VDD
GND
VDD
CD
VIN
1
23
4
PST
84XX
• We shall not be liable for any trouble or damage caused by using this circuit.
• In the event a problem which may affect industrial property or any other rights of us or a third party is
encountered during the use of information described in these circuit, Mitsumi Electric Co., Ltd. shall not be
liable for any such problem, nor grant a license therefore.
PST
83XX
4
1
23
OUT
VDD
GND
CD
VIN
PST
84XX
4
1
23
OUT
VDD
GND
CD
VIN
• Please note that there is any possibility of circuit oscillation when resistance put in the line VIN.
• Please do not put resistance for PST83XX.
• Recommend 15kΩ or less for PST84XX.
PST84XX * 1 - 4 in the circuit diagram is pin number for the SSON-4 package.
PST83XX * 1 - 4 in the circuit diagram is pin number for the SSON-4 package.
