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UTC 81XX
LINEAR INTEGRATED CIRCUIT
POWER RESET IC
DESCRIPTION
The function of UTC 81XX is to accurately reset system
after detecting the supply voltage at the time of switching
power on and instantaneous power off in various CPU and
other logic systems. Further, this IC, with its super low
consumption current and high precision voltage detection
capacity, is most suited as a voltage check circuit for a
number of products which use batteries.
FEATURES
*High precision voltage detection. (Vs±3% max)
*low current consumption.
(ICCH=15µA typ. ICCL=10µA typ.)
*Low operating threshold voltage (0.65V typ.)
*Hystresis voltage is provided as a detect voltage.
(50mV typ.)
*Large output current at the time ON (15mA typ.)
*The detect voltage can be selected at your discretion at 0.1V
step within the range of 1.9V to 4.6V by the following
stipulation method.
UTC 81XX (XX : detected voltage value)
APPLICATIONS
*Reset circuits for microcomputers, CPU and MPU.
*Reset circuit for logic circuitry.
*Battery voltage check circuit.
*Circuit for changing over to backup battery.
*Level detecting circuit.
2
1
3
SOT-23
1
2
3
1
5
4
SOT-25
TO-92
1
SOT-89
SOT-23 : SEE PAGE 2
SOT-25 : SEE PAGE 2
TO-92 1: VOUT; 2: VCC; 3: GND
SOT-89 1: VCC 2: GND 3: VOUT
BLOCK DIAGRAM
The Pin2 this product is SUB, so connect the pin to Ground.
UTC UNISONIC TECHNOLOGIES CO., LTD.
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UTC 81XX
LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE PIN CODE PIN 1 PIN 2 PIN 3 PIN4 PIN 5
SOT-23
2
VCC VOUT GND --
--
3
VOUT GND VCC
--
--
VOLTAGE
CODE
MARKING
3
21
DATE
CODE
PIN CODE
SOT-25
5
GND VOUT VCC
--
--
32 1
A NC NC GND VOUT VCC
DATE
VOLTAGE
CODE
CODE
PIN CODE
B VOUT VCC GND NC NC
45
TO-92
D
Vcc GND Vout --
--
UTC
81XX
E Vout Vin GND
PIN CODE
1 23
DATE
CODE
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Storage temperature
Operating temperature
Power supply voltage
SYMBOL
TSTG
TOPR
VCC
VALUE
-40~+125
-20~+75
-0.3~+10
UNIT
°C
°C
V
ELECTRICAL CHARACTERISTICS (Ta=25°C, The unit of resistance is unless otherwise indicated.)
PARAMETER
SYMBOL (*1)
TEST CONDITIONS
MIN TYP MAX UNIT
Detection Voltage
Vs
1 RL=470,
UTC 8150 4.850 5.000 5.150 V
Vcc=H->L ,
Vo=Vcc
UTC 8146 4.462 4.600 4.738
UTC 8145 4.365 4.500 4.635
UTC 8144 4.268 4.400 4.532
UTC 8143 4.171 4.300 4.429
UTC 8142 4.074 4.200 4.326
UTC 8141 3.977 4.100 4.223
UTC 8140 3.880 4.000 4.120
UTC 8139 3.783 3.900 4.017
UTC 8138 3.686 3.800 3.914
UTC 8137 3.589 3.700 3.811
UTC 8136 3.492 3.600 3.708
UTC UNISONIC TECHNOLOGIES CO., LTD.
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UTC 81XX
LINEAR INTEGRATED CIRCUIT
PARAMETER
SYMBOL (*1) TEST CONDITIONS
UTC 8135
UTC 8134
UTC 8133
UTC 8132
UTC 8131
UTC 8130
UTC 8129
UTC 8128
UTC 8127
UTC 8126
UTC 8125
UTC 8124
UTC 8123
UTC 8122
UTC 8121
UTC 8120
UTC 8119
UTC 8118
Hysteresis Voltage
Vs 1 RL=470, Vcc=L->H->L,
Vo=Vcc
Detection Voltage Temperature Vs/T
1 RL=470, Ta=-20~+75°C
Coefficient
Vo=Vcc
Low Level Output Voltage
VOL 1 Vcc=Vs min.-0.05V,
RL=470, Vo=Vcc
Output Leakage Current
IOH 1 Vcc=10V , Vo=Vcc
Circuit Current at ON Time
ICCL 1 Vcc=Vs min.-0.05V, RL=,
Vo=Vcc
Circuit Current at OFF Time
ICCH
1 Vcc=Vs typ./0.85, RL=,
Vo=Vcc
“H” Transmission Delay Time TpLH (*2) 2 CL=100pF, RL=4.7K
“L” Transmission Delay Time TpHL (*3) 2 CL=100pF, RL=4.7k
Operating Threshold Voltage
VOPL
1 RL=4.7k, VOL<=0.4V
Output current at ON Time 1
IOL1 1 RL=0, Vcc=Vs min.-0.05V,
Vo=0.4V
Output current at ON Time 2
IOL2
1 Ta=-20~+75°C
RL=0, Vcc=Vs min.-0.15V
Vo=0.4V
Note:
(*1) MEASUREMENT CIRCUIT
(*2) TpLH: Vcc=(Vs Typ. –0.4V) -> (Vs Typ. +0.4V)
(*3) TpHL: Vcc=(Vs Typ. +0.4V) -> (Vs Typ. -0.4V)
MIN
3.395
3.298
3.201
3.104
3.007
2.910
2.813
2.716
2.619
2.522
2.425
2.328
2.231
2.134
2.037
1.940
1.843
1.746
30
5
3
TYP
3.500
3.400
3.300
3.200
3.100
3.000
2.900
2.800
2.700
2.600
2.500
2.400
2.300
2.200
2.100
2.000
1.900
1.800
50
±0.01
0.2
3
3
20
20
0.65
MAX
3.605
3.502
3.399
3.296
3.193
3.090
2.987
2.884
2.781
2.678
2.575
2.472
2.369
2.266
2.163
2.060
1.957
1.854
100
0.4
±0.1
5
5
60
60
0.85
UNIT
mV
%/°C
V
µA
µA
µA
µS
µS
V
mA
mA
UTC UNISONIC TECHNOLOGIES CO., LTD.
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UTC 81XX
LINEAR INTEGRATED CIRCUIT
MEASURING CIRCUITS
NOTE:
1.) A: DC AMMETER
2.) INPUT PULSE
V: DC VOLTMETER CRT: OSCILLOSCOPE
VsTyp. +0.4V
VsTyp. -0.4V
0V
UTC UNISONIC TECHNOLOGIES CO., LTD.
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UTC 81XX
LINEAR INTEGRATED CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UTC UNISONIC TECHNOLOGIES CO., LTD.
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