UTC 81XX
POWER RESET IC
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
2
1
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.
3
1
SOT-23
TO-92
1
FEATURES
*High precision voltage detection. (Vs±3% max)
*low current consumption.
(I
CCH
=15µA typ. I
CCL
=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)
3
2
1
5
4
SOT-25
SOT-89
SOT-23 : SEE PAGE 2
SOT-25 : SEE PAGE 2
TO-92 1: V
OUT
; 2: V
CC
; 3: GND
SOT-89 1: V
CC
2: GND 3: V
OUT
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.
BLOCK DIAGRAM
The Pin2 this product is SUB, so connect the pin to Ground.
UTC
UNISONIC TECHNOLOGIES
CO., LTD.
1
QW-R119-001,I
UTC 81XX
MARKING INFORMATION
PACKAGE
PIN CODE
2
SOT-23
3
V
OUT
PIN 1
V
CC
LINEAR INTEGRATED CIRCUIT
PIN 2
V
OUT
PIN 3
GND
PIN4
--
PIN 5
--
VOLTAGE
CODE
MARKING
3
DATE
CODE
PIN CODE
GND
V
CC
--
--
2
1
5
GND
V
OUT
V
CC
--
--
3
2
1
DATE
CODE
PIN CODE
A
SOT-25
B
NC
NC
GND
V
OUT
V
CC
VOLTAGE
CODE
V
OUT
V
CC
GND
NC
NC
4
5
D
TO-92
Vcc
GND
Vout
--
--
PIN CODE
UTC
81XX
DATE
CODE
E
Vout
Vin
GND
1
2
3
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Storage temperature
Operating temperature
Power supply voltage
SYMBOL
T
STG
T
OPR
V
CC
VALUE
-40~+125
-20~+75
-0.3~+10
UNIT
°C
°C
V
ELECTRICAL CHARACTERISTICS
(Ta=25°C, The unit of resistance is
Ω
unless otherwise indicated.)
PARAMETER
Detection Voltage
SYMBOL
Vs
(*1)
1
TEST CONDITIONS
RL=470Ω,
Vcc=H->L ,
Vo=Vcc
UTC 8150
UTC 8146
UTC 8145
UTC 8144
UTC 8143
UTC 8142
UTC 8141
UTC 8140
UTC 8139
UTC 8138
UTC 8137
UTC 8136
MIN
4.850
4.462
4.365
4.268
4.171
4.074
3.977
3.880
3.783
3.686
3.589
3.492
TYP
5.000
4.600
4.500
4.400
4.300
4.200
4.100
4.000
3.900
3.800
3.700
3.600
MAX
5.150
4.738
4.635
4.532
4.429
4.326
4.223
4.120
4.017
3.914
3.811
3.708
UNIT
V
UTC
UNISONIC TECHNOLOGIES
CO., LTD.
2
QW-R119-001,I
UTC 81XX
PARAMETER
LINEAR INTEGRATED CIRCUIT
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
RL=470Ω, Vcc=L->H->L,
Vo=Vcc
RL=470Ω, Ta=-20~+75°C
Vo=Vcc
Vcc=Vs min.-0.05V,
RL=470Ω , Vo=Vcc
Vcc=10V , Vo=Vcc
Vcc=Vs min.-0.05V, RL=∞,
Vo=Vcc
Vcc=Vs typ./0.85, RL=∞,
Vo=Vcc
CL=100pF, RL=4.7KΩ
CL=100pF, RL=4.7kΩ
RL=4.7kΩ, VOL<=0.4V
RL=0, Vcc=Vs min.-0.05V,
Vo=0.4V
Ta=-20~+75°C
RL=0, Vcc=Vs min.-0.15V
Vo=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
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
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
UNIT
Hysteresis Voltage
Detection Voltage Temperature
Coefficient
Low Level Output Voltage
Output Leakage Current
Circuit Current at ON Time
Circuit Current at OFF Time
“H” Transmission Delay Time
“L” Transmission Delay Time
Operating Threshold Voltage
Output current at ON Time 1
Output current at ON Time 2
∆Vs
Vs/∆T
V
OL
I
OH
I
CCL
I
CCH
TpLH (*2)
TpHL (*3)
V
OPL
I
OL
1
I
OL
2
1
1
1
1
1
1
2
2
1
1
1
mV
%/°C
0.4
±0.1
5
5
60
60
0.85
V
µA
µA
µA
µS
µS
V
mA
mA
3
3
20
20
0.65
5
3
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)
UTC
UNISONIC TECHNOLOGIES
CO., LTD.
3
QW-R119-001,I
UTC 81XX
MEASURING CIRCUITS
LINEAR INTEGRATED CIRCUIT
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.
4
QW-R119-001,I
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.
5
QW-R119-001,I
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