ME2803
Voltage Detectors , ME2803 Series
General Description
Features
ME2803 Series are highly precise, low power
Highly accuracy: ±1% (-VDET=2.2V 以上)
consumption voltage detectors, manufactured using
Low power consumption:
TYP 0.7uA (VIN=3.5V, -VDET=2.0V)
Detect
CMOS technologies. Detect voltage is extremely
accurate with minimal temperature drift. CMOS
output configurations are available.
voltage
range : 1.0V~6.5V
increments
Operating voltage range:0.7V~7V
Detect voltage temperature characteristics:
TYP±100ppm/℃
Typical Application
Microprocessor reset circuitry
Memory battery back-up circuits
Power-on reset circuits
Power failure detection
Output configuration: CMOS
Package
● 3-pin SOT23-3、SOT89-3、TO-92
Typical Application Circuit
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Page 1 of 12
0.1V
ME2803
Selection Guide
ME 2803X X X X X G
Environment mark
Package:
M3-SOT23-3
T-TO-92
P-SOT89-3
Output Voltage
Function
Product Type
Product Series
Microne
product series
product description
ME2803A10M3G
VOUT =1.0V;Rising edge detection;Package:SOT23-3
ME2803A A33M3G
VOUT =3.3V;Rising edge detection;Package:SOT23-3
NOTE:
1. At present ,there are seventeen kinds of voltage value:
1.0V、1.1V、1.4V、1.6V、1.8V、2.2V、2.5V、2.7V、2.8V、3.0V、3.3V、3.4V、3.5V。
2. If you need other voltage and package, please contact our sales staff.
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ME2803
Pin Configuration
TO-92
SOT-23-3
SOT-89-3
Pin Assignment
ME2803XX
Pin Number
SOT-23-3
SOT-89-3
TO-92
2
1
3
3
1
2
3
1
2
Pin Name
Functions
GND
VOUT
VIN
Ground
Output Voltage
Input Voltage
Block Diagram
Absolute Maximum Ratings
PARAMETER
SYMBAL
RATINGS
UNITS
VIN Input Voltage
VIN
8
V
Output Current
IOUT
50
mA
VOUT
GND-0.3~VIN+0.3
V
Output Voltage
CMOS
Continuous Total Power
Dissipation
SOT-23-3
SOT-89-3
300
Pd
TO-92
500
mW
500
Operating Ambient Temperature
TOpr
-40~+85
℃
Storage Temperature
Tstg
-40~+125
℃
Soldering temperature and time
Tsolder
260℃, 10s
MM
400
V
HBM
4000
V
ESD
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ME2803
Electrical Characteristics
(-VDET(S)=1.0V to 6.5V±1% ,Ta=25OC ,unless otherwise noted)
Parameter
Symbol
Detect
Voltage
-VDET
Hysteresis
Range
VHYS
Supply
Current
ISS
Conditions
Min.
Typ
Max.
-VDET(S)≦1.5V
-VDET(S)
×0.98
-VDET(S)
-VDET(S)
×1.02
-VDET(S)>1.5V
-VDET(S)
×0.99
-VDET(S)
-VDET(S)
×1.01
-
0.03
0.06
0.1
VIN=2V (1.0V-1.5V)
-
0.7
1
VIN =3.5V (1.6V-2.0V)
-
0.7
1
1.2
2
1.1
2
1.0
2
VIN=4.5V (2.1V-3.9V)
VIN =6V (4.0V-5.6V)
-
VIN=7V (5.7V-6.5V)
Iout
N-ch
Units
V
V
uA
VDS=0.5V VIN =0.7V
0.01
0.14
--
mA
Iout
P-ch
VDS=0.5V VIN =7V
1.7
3.4
--
mA
Operating
voltage
VIN
-
0.7
-
7
V
Responding
time
tpLH
60
us
Temperature
characteristics
VDET
Ta VDET
±350
ppm/℃
Output
Current
Ta =-40℃ ~ 85℃
-
±100
Note: 1、-VDET(S) :Specified Detection Voltage value
2、-VDET :Actual Detection Voltage value
3、Release Voltage:+VDET=-VDET+VHYS
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ME2803
Functional Description:
1、 When input voltage (VIN) rises above detect voltage (–VDET), output voltage (VOUT) will be equal to VIN.
2、 When input voltage (VIN) falls below detect voltage (–VDET), output voltage (VOUT) will be equal to the
ground voltage (GND) level.
3、 When input voltage (VIN) falls to a level below that of the minimum operating voltage (VMIN), output will become
unstable. In this condition, VIN will equal the pulled-up output (should output be pulled-up.)
4、 When input voltage (VIN) rises above the ground voltage (GND) level, output will be unstable at levels below the
minimum operating voltage (VMIN). Between the VMIN and detect release voltage +VDET) levels, the ground
voltage (GND) level will be maintained.
5、 When input voltage (VIN) rises above detect release voltage (+VDET), output voltage (VOUT) will be equal to VIN.
6、 The difference between +VDET and –VDET represents the hysteresis range.
Timing Chart:
ME2803XX:
Directions for use:
1、 Please use this IC within the stated maximum ratings. Operation beyond these limits may cause degrading or
permanent damage to the device.
2、When a resistor is connected between the VIN pin and the input with CMOS output configurations, oscillation may
occur as a result of voltage drops at RIN if load current(IOUT) exists.(refer to the Oscillation Description(1) below)
3、When a resistor is connected between the VIN pin and the input with CMOS output configurations, oscillation may
occur as a result of through current at the time of voltage release even if load current(IOUT) does not exist. (refer
to the Oscillation Description(2) below)
4、With a resistor connected between the VIN and the input, detect and release voltage will rise as a result of the IC’s
supply current flowing through the VIN pin.
5、In order to stabilize the IC’s operations, please ensure that VIN pin’s input frequency’s rise and fall times are more
than several u Sec/V.
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ME2803
Oscillation Description:
1、 Output current oscillation with the CMOS output configuration
When the voltage applied at IN rises, release operations commence and the detector’s output voltage increase.
Load current (IOUT) will flow at RL. Because a voltage drop (RIN*IOUT) is produces at the RIN resistor, located
between the input (IN) and the VIN pin. The load current will flow via the IC’s pin. The voltage drop will also lead to
a fall in the voltage level at the VIN pin. When the VIN pin voltage level falls below the detect voltage level, detect
operations will commence. Fllowing detect operations, load current flow will cease and since voltage drop at R IN
will disapper, the voltage level at the VIN pin will rise and release operations will begin over again. Oscillation may
occur with this “release-detect-release” repetition. Further, this condition will also appear via means of a similar
mechanism during detect operations.
2、 Oscillation as a result of through current
Since the ME2803 series are CMOS IC’s, through current will flow when the IC’s internal circuit switching
operates (during release and detect operations). Consequently, oscillation is liable to occur as a result of drops in
voltage at the through current’s resistor (RIN) during release voltage operations.(refer to diagram 2) since
hysteresis exists during detect operations, oscillation is unlikely to occur.
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ME2803
Type Characteristics
1、SUPPLY CURRENT VS. AMBIENT TEMPERATURE
VIN=2V,-VDET=1.1V
VIN=3V,-VDET=2.2V
Iss VS Temp
I ss VS T E M P
Iss (uA)
Iss (uA)
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
-15
7
20
30
40
50
60
70
80
90 100
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
- 1 6 10
20
30
40
50
60
70
80
90 100
T E M P℃)
(
Temp (℃)
2、SUPPLY CURRENT VS. INPUT VOLTAGE
-VDET=1.1V (T=25℃)
-VDET=2.2V (T=25℃)
Iss VS VIN
I s s VS VI N
1.6
1.2
Iss (uA)
1.4
Iss (uA)
1.2
1
0.8
0.6
0.4
1
0.8
0.6
0.4
0.2
0.2
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
VIN (V)
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0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
VI N ( V)
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5.5
6
ME2803
3、DETECT,RELEASE VOLTAGE VS. AMBIENT TEMPERATURE
-VDET=1.1V
-VDET=2.2V
VDET VS TEMP
1.25
2.35
1.2
2.3
VDET (V)
VDET (V)
VDET VS TEMP
1.15
1.1
1.05
-VDET
+VDET
2.25
2.2
2.15
1
+VDET
-VDET
2.1
-15
7
20
30
40
50
60
70
80
90 100 110 120
-16 10
20
30
40
TEMP (℃)
VDS=0.5V
7
0.8
6
T=100℃
Iout (mA)
Iout (mA)
80
90 100 110 120
Iout (N) VS VIN
1
T=-15℃
70
-VDET=2.2V
Iout(N) VS VIN
0.4
60
TEMP (℃)
4、 N-ch OUTPUT CURRENT VS. INPUT VOLTAGE
VDS=0.5V -VDET=1.1V
0.6
50
T=25℃
0.2
T=-15℃
5
T=23℃
4
T=85℃
3
2
1
0
0
0.2
0.4
0.6
0.8
1
0.2
0.5
0.7
VIN (V)
1
1.2
1.7
2.2
VIN (V)
5、P-ch OUTPUT CURRENT VS. INPUT VOLTAGE
VDS=0.5V
-VDET=1.1V
VDS=0.5V
-VDET=2.2V
I o u t ( P ) VS VI N
I o u t ( P ) VS VI N
1.5
3.5
(mA)
(mA)
3
2.5
Iout
3.5
Iout
2
1
0.5
T = 1 0℃0
T = 2℃
5
T = - 1℃5
3
2.5
2
1.5
1
T = 8℃
5
0.5
T = 2℃
3
T = - 1℃5
4
4.5
0
0
1.2
1.5
2
2.5
3
3.5
5
2.5
2.8
3.2
3.5
VI N ( V)
VI N ( V)
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2.3
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5
ME2803
Packaging Information
● SOT23-3
DIM
Millimeters
Inches
Min
Max
Min
Max
A
2.7
3.1
0.1063
0.122
B
1.7
2.1
0.0669
0.0827
b
0.35
0.5
0.0138
0.0197
C
1.0
1.2
0.0394
0.0472
c
0.1
0.25
0.0039
0.0098
d
0.2
-
0.0079
-
E
2.6
3.0
0.1023
0.1181
e
1.5
1.8
0.059
0.0708
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ME2803
● SOT89-3
DIM
Millimeters
Inches
Min
Max
Min
Max
A
1.4
1.6
0.0551
0.0630
A1
1.4
1.6
0.0551
0.0630
a
0.36
0.48
0.0142
0.0189
b
0.41
0.53
0.0161
0.0209
c
0.36
0.48
0.0142
0.0189
d
1.4
1.75
0.0551
0.0689
B
0.38
0.43
0.015
0.0169
C
1.4
1.6
0.0551
0.0630
D
4.4
4.6
0.1732
0.181
E
-
4.25
-
0.1673
e
2.4
2.6
0.0945
0.1023
L1
0.4
-
0.0157
-
L2
0.8
-
0.0315
-
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ME2803
● TO-92
DIM
V03
Millimeters
Inches
Min
Max
Min
Max
A
3.4
3.8
0.13386
0.1496
B
0.3
0.5
0.0118
0.0197
C
4.4
4.8
0.1732
0.189
D
4.4
4.8
0.1732
0.189
E
0.9
1.5
0.0354
0.059
e
1.17
1.37
0.046
0.0539
e1
2.39
2.69
0.094
0.1059
L
12
16
0.4724
0.6299
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ME2803
The information described herein is subject to change without notice.
Nanjing Micro One Electronics Inc is not responsible for any problems caused by circuits or diagrams
described herein whose related industrial properties, patents, or other rights belong to third parties.
The application circuit examples explain typical applications of the products, and do not guarantee the
success of any specific mass-production design.
Use of the information described herein for other purposes and/or reproduction or copying without the
express permission of Nanjing Micro One Electronics Inc is strictly prohibited.
The products described herein cannot be used as part of any device or equipment affecting the human
body, such as exercise equipment, medical equipment, security systems, gas equipment, or any
apparatus installed in airplanes and other vehicles, without prior written permission of Nanjing Micro
One Electronics Inc.
Although Nanjing Micro One Electronics Inc exerts the greatest possible effort to ensure high quality
and reliability, the failure or malfunction of semiconductor products may occur. The user of these
products should therefore give thorough consideration to safety design, including redundancy,
fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community
damage that may ensue.
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