UTC 81LXX
VOLTAGE DETECTORS
DESCRIPTION
The UTC 81LXX series are highly precise, low power
consumption voltage detectors, manufactured using CMOS
and laser trimming technologies. Detect voltage is extremely
accurate with minimal temperature drift.
CMOS IC
2
1
3
1
FEATURES
*Highly accurate : ± 2%
*Low power consumption : 0.7μA
(typ.)
(V
IN
=1.5V)
*Detect voltage range : 0.9V ~ 6.0V in 0.1V increments
*Operating voltage range : 0.7V ~ 10V
*Detect voltage temperature characteristics:
±100ppm/℃
(typ.)
SOT-23
TO-92
1
1
2
4
APPLICATIONS
*Microprocessor reset circuitry
*Memory battery back-up circuits
*Power-on reset circuits
*Power failure detection
*System battery life and charge voltage monitors
3
SSOT-24
SOT-89
SSOT-24: 1. V
OUT
SOT-23:
1. V
SS
SOT-89:
1. V
OUT
TO-92:
81LXX-D: 1. V
IN
81LXX-E: 1. V
OUT
2. V
IN
3. NC
4. V
SS
2. V
OUT
3. V
IN
2. V
IN
3. V
SS
2. V
SS
2. V
IN
3. V
OUT
3. V
SS
DETECT VOLTAGE RANK LIST
PART
NUMBER
81L09
81L11
81L15
81L18
81L20
81L24
81L25
81L27
81L34
81L36
81L45
DETECT
VOLTAGE
0.9V
1.1V
1.5V
1.8V
2.0V
2.4V
2.5V
2.7V
3.4V
3.6V
4.5V
DETECT
VOLATGE
CODE
09
11
15
18
20
24
25
27
34
36
45
MARKING CODE
(For SSOT-24/SOT-23
PACKAGE)
L09
L11
L15
L18
L20
L24
L25
L27
L34
L36
L45
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R119-002,D
UTC 81LXX
BLOCK DIAGRAM
CMOS IC
V
IN
+
-
Vref
V
OUT
Vss
ABSOLUTE MAXIMUM RATINGS
(Ta=25℃)
PARAMETER
Input Voltage
Output Current
Output Voltage
Power Dissipation
SSOT-24
SOT-23
SOT-89
TO-92
Operating Ambient Temperature
Storage Temperature
SYMBOL
V
IN
I
OUT
V
OUT
RATINGS
12
50
Vss-0.3 ~ V
IN
+0.3
150
150
500
300
-40 ~ +85
-40 ~ +125
UNIT
V
mA
V
Pd
mW
Topr
Tstg
℃
℃
ELECTRICAL CHARACTERISTICS
(Ta=25℃)
PARAMETER
Detect Voltage
Hysteresis Range
Supply Current
CIRCUIT SYMBOL
1
1
V
DF
V
HYS
TEST CONDITONS
MIN
TYP
MAX.
UNIT
V
V
2
I
SS
Operating Voltage
Output Current
(V
DF
≦1.5V)
Output Current
(V
DF
≧1.6V)
Temperature
Characteristics
Delay Time
(V
DR
→V
OUT
inversion)
1
4
4
V
IN
I
OUT
I
OUT
△V
DF
△Topr·V
DF
V
IN
=1.5V
V
IN
=2.0V
V
IN
=3.0V
V
IN
=4.0V
V
IN
=5.0V
V
DF
(T)=0.9V ~ 6.0V
P-ch
V
DS
=2.1V, V
IN
=6.0V
P-ch
V
DS
=2.1V, V
IN
=8.0V
-40℃≤Topr≤85℃
V
DF×
0.98
V
DF×
1.02
V
DF
*
V
DF×
0.02 V
DF×
0.05 V
DF×
0.08
0.7
2.3
0.8
2.7
0.9
3.0
1.0
3.2
1.1
3.6
0.7
10.0
-7.5
-10.0
±100
0.2
-1.5
-2.0
μA
V
mA
mA
ppm/℃
ms
5
t
DLY
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R119-002,D
UTC 81LXX
Note: V
DF
(T) : Established Detect Voltage Value
Release Voltage: V
DR
= V
DF
+ V
HYS
* Detect voltage of ±1% tolerance is also available per customer’s request.
CMOS IC
TYPICAL APPLICATION CIRCUITS
V
IN
V
IN
Vss
V
OUT
MEASURING CIRCUITS
Circuit 1
Circuit 2
A
V
IN
V
IN
V
OUT
Vss
V
V
IN
V
IN
V
OUT
Vss
Circuit 3
Circuit 4
V
IN
V
IN
V
OUT
A
V
DS
V
OUT
A
V
IN
V
IN
V
DS
Vss
Vss
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R119-002,D
UTC 81LXX
Circuit 5
CMOS IC
V
IN
V
OUT
Vss
measurement of
waveform
FUNCTIONAL DESCRIPTION
1.
2.
3.
4.
When input voltage (V
IN
) rises above detect voltage (V
DF
), output voltage (V
OUT
) will be equal to V
IN
.
When input voltage (V
IN
) falls below detect voltage (V
DF
), output voltage (V
OUT
) will be equal to the ground
voltage (V
SS
) level.
When input voltage (V
IN
) falls to a level below that of the minimum operating voltage (V
MIN
), output will become
unstable. In this condition, V
IN
will equal the pulled-up output ( should output be pulled-up.)
When input voltage (V
IN
) rises above the ground voltage (V
SS
) level, output will be unstable at levels below the
minimum operating voltage (V
MIN
). Between the V
MIN
and detect release voltage (V
DR
) levels, the ground
voltage (V
SS
) level will be maintained.
When input voltage (V
IN
) rises above detect release voltage (V
DR
), output voltage (V
OUT
) will be equal to V
IN
.
The difference between V
DR
and V
DF
represents the hysteresis range.
5.
6.
TIMING CHART
INPUT VOLTAGE(V
IN
)
DETECT RELEASE VOLTAGE(V
DR
)
DETECT VOLTAGE(V
DF
)
MIN.OPERATING VOLTAGE(V
MIN
)
GROUND VOLTAGE(Vss)
OUTPUT VOLTAGE(V
OUT
)
6
GROUND VOLTAGE(Vss)
1
2
3
4
5
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R119-002,D
UTC 81LXX
TYPICAL PERFORMANCE CHARACTERISTICS
(1) SUPPLY CURRENT vs. INPUT VOLTAGE
3.5
3.0
Supply Current, Iss (μA)
Supply Current, Iss (μA)
2.5
2.0
1.5
1.0
0.5
0
0
1
2
4
3
Input Voltage, V
IN
(V)
-40℃
5
6
25℃
Ta=85℃
CMOS IC
81L09
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
1
81L11
25℃
Ta=85℃
-40℃
2
3
4
Input Voltage, V
IN
(V)
5
6
3.5
3.0
Supply Current, Iss (μA)
81L15
3.5
3.0
Supply Current, Iss (μA)
2.5
2.0
81L18
2.5
2.0
1.5
1.0
0.5
0
0
1
2
3
4
Input Voltage, V
IN
(V)
-40℃
5
6
25℃
Ta=85℃
25℃
1.5
1.0
0.5
0
0
2
Ta=85℃
6
4
8
Input Voltage, V
IN
(V)
10
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
2
-40℃
81L20
3.5
3.0
Supply Current, Iss (μA)
2.5
2.0
1.5
1.0
0.5
10
0
0
2
81L24
Supply Current, Iss (μA)
25℃
Ta=85℃
25℃
Ta=85℃
-40℃
-40℃
6
8
4
Input Voltage, V
IN
(V)
8
6
4
Input Voltage, V
IN
(V)
10
UTC
UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R119-002,D
嵌入式系统
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