UTC 81NXX
VOLTAGE DETECTORS (DELAY
CIRCUIT BUILT-IN)
DESCRIPTION
The UTC 81NXX is highly accurate, low power consumption
voltage detectors, manufactured using CMOS and laser trimming
technologies. A delay circuit is built-in to each detector.
Detect voltage is extremely accurate with minimal temperature
drift.
Since the delay circuit is built-in, peripherals are unecessary
and high density mounting is possible.
CMOS IC
1
1
2
3
SOT-23
SOT-89
FEATURES
*Highly Accurate: Detect voltage ± 2%
*Low Power Consumption : 1.0μA
(typ.)
( V
IN
=2.0V )
*Detect Voltage Range: 1.6V ~ 6.0V in 0.1V increments
*Operating Voltage Range: 0.7V ~ 10.0V
*Detect Voltage Temperature Characteristics
:
±100ppm/℃
(typ.)
*Built-In Delay Circuit: 1ms ~ 50ms, 50ms ~ 200ms, 80ms ~
400ms
*Output Configuration: N-channel open drain
*No parts are available with an accuracy of ±1%
1
TO-92
APPLICATIONS
*Microprocessor reset circuitry
*Memory battery back-up circuits
*Power-on reset circuits
*Power failure detection
*System battery life and charge voltage monitors
*Delay circuitry
BLOCK DIAGRAM
V
IN
V
OUT
Delay Circuit
Vref
Vss
N-channel Open Drain Output
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R119-004,B
UTC 81NXX
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
18:1.8V
19:1.9V
20:2.0V
21:2.1V
22:2.2V
23:2.3V
24:2.4V
25:2.5V
26:2.6V
27:2.7V
28:2.8V
29:2.9V
30:3.0V
31:3.1V
32:3.2V
33:3.3V
34:3.4V
35:3.5V
36:3.6V
37:3.7V
38:3.8V
39:3.9V
40:4.0V
41:4.1V
42:4.2V
43:4.3V
44:4.4V
45:4.5V
46:4.6V
50:5.0V
CMOS IC
PIN
CODE
PIN 1
PIN 2
PIN 3
MARKING
SOT-89
Vout
Vin
Vss
DATE
CODE
DELAY
TIME
81NXX
1
2
3
VOLTAGE
CODE
D
Vin
Vss
Vout
DELAY
TIME
PIN CODE
TO-92
UTC
81NXX
E
Vout
Vin
Vss
VOLTAGE
CODE
DATE
CODE
1
2
3
INTEGER* CODE DECIMAL** CODE DELAY TIME
1.
2.
3.
4.
5.
6.
1
2
3
4
5
6
0.
1.
2.
3.
4.
5.
6.
7.
8.
9.
A
B
C
D
E
F
G
H
J
K
1~ 50ms
50 ~ 200ms
80 ~ 400ms
CODE
H
J
K
VOLTAGE
CODE
MARKING
3
DELAY
TIME
2
1
SOT-23
PIN 1
Vss
PIN 2
Vout
PIN 3
Vin
* Represents the integer of the Detect Voltage
** Represents the decimal number of the Detect Voltage
ABSOLUTE MAXIMUM RATINGS
(Ta=25℃)
PARAMETER
Input Voltage
Output Current
Output Voltage
Continuous Total
Power Dissipation
SYMBOL
V
IN
I
OUT
V
OUT
P
D
Topr
Tstg
RATINGS
12
50
Vss-0.3 ~ 9
150
500
300
-30 ~ +80
-40 ~ +125
UNIT
V
mA
V
mW
℃
℃
SOT-23
SOT-89
TO-92
Operating Ambient Temperature
Storage Temperature
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R119-004,B
UTC 81NXX
ELECTRICAL CHARACTERISTICS
(Ta=25℃, unless otherwise noted.)
PARAMETER
Detect Voltage
Hysteresis Range
Supply Current
CMOS IC
SYMBOL
V
DF
V
HYS
V
IN
=1.5V
=2.0V
=3.0V
=4.0V
=5.0V
V
DF
=1.6V ~ 6.0V
N-ch, V
DS
=0.5V
V
IN
=1.0V
=2.0V
=3.0V
=4.0V
=5.0V
TEST CONDITONS
MIN
V
DF
(T)
X
0.98
V
DFX
0.02
TYP
V
DF
(T)
V
DFX
0.05
0.9
1.0
1.3
1.6
2.0
MAX
V
DF
(T)
X
1.02
V
DFX
0.08
2.6
3.0
3.4
3.8
4.2
10.0
UNIT
V
V
I
SS
μA
Operating Voltage
Output Current
V
IN
0.7
2.2
7.7
10.1
11.5
13.0
V
I
OUT
mA
△V
DF
Detect Voltage Temperature
ppm/℃
±100
△Topr·V
DF
Characteristics
Transient Delay Time
V
IN
changes from
t
DLY
*
50
200
ms
(V
DR
0.6V ~ 10V
V
OUT
inversion)
V
DF
(T): established detect voltage value
Release Voltage: V
DR
= V
DF
+ V
HYS
* Transient Delay Time: 1ms ~ 50ms & 80ms ~ 400ms versions are also available.
Note: The power consumption during power-start to output being stable (release operation) is 2μA greater than it is
after that period (completion of release operation) because of delay circuit through current.
TYPICAL APPLICATION CIRCUIT
V
IN
V
IN
V
OUT
Vss
R
100kΩ
N-channel Open Drain Output
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R119-004,B
UTC 81NXX
TYPICAL PERFORMANCE CHARACTERISTICS
(1)
CMOS IC
81N16
81N25
SUPPLY CURRENT vs. INPUT VOLTAGE
4.0
4.0
Supply Current, Iss (µA)
Supply Current, Iss (µA)
3.0
3.0
2.0
Ta=80℃
-30℃
2.0
Ta=80℃
1.0
25℃
0.0
0
2
4
6
8
10
1.0
25℃
0.0
0
2
4
6
-30℃
8
10
Input Voltage, V
IN
(V)
4.0
81N27
4.0
Input Voltage, V
IN
(V)
81N28
Supply Current, Iss (µA)
3.0
Supply Current, Iss (µA)
3.0
2.0
2.0
Ta=80℃
1.0
Ta=80℃
-30℃
25℃
0
2
4
6
8
10
1.0
25℃
0.0
0
2
4
6
-30℃
0.0
8
10
Input Voltage, V
IN
(V)
4.0
81N29
Input Voltage, V
IN
(V)
4.0
81N30
Supply Current, Iss (µA)
3.0
Supply Current, Iss (µA)
3.0
2.0
Ta=80℃
2.0
Ta=80℃
1.0
25℃
0.0
0
2
4
6
-30℃
1.0
25℃
-30℃
8
10
0.0
0
2
4
6
8
10
Input Voltage, V
IN
(V)
Input Voltage, V
IN
(V)
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R119-004,B
UTC 81NXX
4.0
81N33
4.0
81N35
CMOS IC
Supply Current, Iss (µA)
3.0
Supply Current, Iss (µA)
3.0
2.0
Ta=80℃
2.0
Ta=80℃
1.0
25℃
0.0
0
2
4
6
-30℃
1.0
25℃
-30℃
8
10
0.0
0
2
4
6
8
10
Input Voltage, V
IN
(V)
Input Voltage, V
IN
(V)
(2) DETECT VOLTAGE, RELEASE VOLTAGE vs. AMBIENT TEMPERATURE
1.8
Detect,Release Voltage, V , V
DR
(V)
DF
81N16
Detect,Release Voltage, V , V
DR
(V)
DF
2.8
81N25
1.7
2.7
2.6
2.5
V
DR
V
DF
V
DR
1.6
V
DF
1.5
2.4
2.3
-40
1.4
-40
-20
0
20
40
60
80
Ambient Temp., Ta (℃)
81N27
Detect,Release Voltage, V , V
DR
(V)
DF
-20
0
20
60
40
Ambient Temp., Ta (℃)
81N28
80
2.9
Detect,Release Voltage, V , V
DR
(V)
DF
3.0
2.8
2.7
2.6
V
DR
2.9
2.8
V
DR
V
DF
V
DF
2.7
2.5
2.4
-40
2.6
2.5
-40
-20
0
20
60
40
Ambient Temp., Ta (℃)
80
-20
0
20
60
40
Ambient Temp., Ta (℃)
80
UTC
UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R119-004,B
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