UNISONIC TECHNOLOGIES CO., LTD
UIC811
MICROPROCESSOR RESET
CIRCUITS
DESCRIPTION
CMOS IC
The UTC
UIC811
series are resetting circuits which can monitor
power supplies especially in microprocessor based systems.
In normal operation, the UTC
UIC811
series can assert a reset
under any of the following situation: the power supply drops below
a designated reset threshold level (which is available for 3V or 3.3V
or 5V system) or
MR
is forced low.
There is an internal active low RESET output which has already
been guaranteed to remain asserted for at 140ms least while V
CC
rises above the designed threshold level.
FEATURES
* Voltage monitor for 3V or 3.3V or 5V power supplies
* Valid RESET remains with V
CC
as low as 1V
* Typical supply current: 5µA
* Fixed 140ms minimum reset pulse width
* With Manual reset input
ORDERING INFORMATION
Ordering Number
UIC811G-x-AE2-2-R
UIC811G-x-AE2-3-R
UIC811G-x-AE3-2-R
UIC811G-x-AE3-3-R
UIC811G-x-AD4-R
UIC811G-x-AL4-R
Package
SOT-23-3
SOT-23-3
SOT-23
SOT-23
SOT-143
SOT-343
1
V
CC
RESET
V
CC
RESET
GND
GND
Pin Assignment
2
3
RESET
GND
RESET
GND
RESET
RESET
GND
V
CC
GND
V
CC
MR
MR
4
-
-
-
-
V
CC
V
CC
Packing
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Note: Pin Assignment :
x: Output Voltage, refer to Marking Information.
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Copyright © 2015 Unisonic Technologies Co., Ltd
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QW-R502-317.N
UIC811
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
3
UX
2
A : 2.63V
B : 2.93V
C : 3.08V
D: 4.00V
E: 4.38V
F: 5.00V
G
1
CMOS IC
SOT-23
SOT-23-3
Voltage Code
Pin Code
SOT-143
SOT-343
PIN CONFIGURATION
SOT-143
SOT-343
SOT-23-3/SOT-23
AE2-2/AE3-2
AE2-3/AE3-3
PIN DESCRIPTION
DESCRIPTION
Ground
This pin will fall low after the V
CC
’s falling below the reset threshold voltage and it also can remain
asserted for at least 140ms min after V
CC
’s rising upon the reset threshold.
Input of manual reset. A reset can be forced by a logic low on
MR
. As the
MR
is held low, the reset wil
MR
PIN NAME
GND
RESET
V
CC
remain asserted, and until the
MR
rise high, the reset will remain 140ms min at least. When it is float
that means it is unused. For SOT-143 and SOT-343 only.
Input of power supply.
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QW-R502-317.N
UIC811
BLOCK DIAGRAM
CMOS IC
V
CC
4
RESET
GENERATOR
Reset
Threshold
2
RESET
MR
3
1
GND
FUNCTIONAL DIAGRAM
V
CC
V
TH
MR
t
RST
RESET
t
RST
Reset Timing Diagram
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UIC811
ABSOLUTE MAXIMUM RATING
PARAMETER
Input Voltage
Input Current (V
CC
,
MR
)
Output Current ( RESET )
Rate of Rise
SYMBOL
V
CC
I
IN
I
OUT
V
CC(RR)
RATINGS
-0.3~+6.0
20
20
CMOS IC
UNIT
V
mA
mA
100
V/µs
SOT-143
320
Power Dissipation
P
D
SOT-343
250
mW
(T
A
=+70°C)
SOT-23/SOT-23-3
300
Operating Temperature
T
OPR
-40~+105
°C
Storage Temperature
T
STG
-65~+150
°C
Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. The device is not guaranteed to function outside its operating rating.
ELECTRICAL CHARACTERISTICS
SYMBOL
TEST CONDITIONS
V
CC
T
A
=-40~+85°C
I
CC
V
CC
=3.0V, no load
V
TH
t
RST
V
OH
I
SOURCE
=500µA
V
CC
= V
TH
min, I
SINK
=1.2mA
V
OL
V
CC
>1V, I
SINK
=50µA, T
A
=-40~+85°C
V
IH
V
IL
MIN
1
2.55
140
2.4
TYP MAX UNIT
6
V
5
10
µA
2.63 2.70
V
240 560 ms
V
0.3
V
0.3
V
V
0.75
V
µS
0.5
10
20
100
SYMBOL
TEST CONDITIONS
V
CC
T
A
=-40~+85°C
I
CC
V
CC
=3.3V, no load
V
TH
t
RST
I
SOURCE
=500µA
V
OH
V
CC
= V
TH
min, I
SINK
=1.2mA
V
OL
V
CC
>1V, I
SINK
=50µA, T
A
=-40~+85°C
V
IH
V
IL
MIN
1
2.85
140
2.64
40
µS
kΩ
ns
UIC811-A (2.63V)
(V
CC
=3V, T
A
= 25°C, unless otherwise specified)
PARAMETER
Operating Voltage Range
Supply Current
Reset Voltage Threshold
Reset Timeout Period
Reset Output Voltage
MR
Input Threshold
MR
Minimum Pulse Width
MR
to Reset Delay
MR
Pull-Up Resistance
MR
Glitch Immunity
2.1
10
UIC811-B (2.93V)
(V
CC
=3.3V, T
A
= 25°C, unless otherwise specified)
PARAMETER
Operating Voltage Range
Supply Current
Reset Voltage Threshold
Reset Timeout Period
Reset Output Voltage
MR
Input Threshold
MR
Minimum Pulse Width
MR
to Reset Delay
MR
Pull-Up Resistance
MR
Glitch Immunity
2.31
10
TYP MAX UNIT
6
V
5
10
µA
2.93 3.00
V
240 560 ms
V
0.3
V
0.3
V
V
0.825 V
µS
0.5
µS
40
kΩ
ns
20
100
10
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UIC811
CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
SYMBOL
TEST CONDITIONS
V
CC
T
A
=-40~+85°C
I
CC
V
CC
=3.3V, no load
V
TH
t
RST
I
SOURCE
=500µA
V
OH
V
CC
= V
TH
min, I
SINK
=1.2mA
V
OL
V
CC
>1V, I
SINK
=50µA, T
A
=-40~+85°C
V
IH
V
IL
MIN
1
3.00
140
2.64
TYP MAX UNIT
6
V
5
10
µA
3.08 3.15
V
240 560 ms
V
0.3
V
0.3
V
V
0.825 V
µS
0.5
10
20
100
SYMBOL
TEST CONDITIONS
V
CC
T
A
=-40~+85°C
I
CC
V
CC
=5.0V, no load
V
TH
t
RST
I
SOURCE
=800µA
V
OH
V
CC
= V
TH
min, I
SINK
=3.2mA
V
OL
V
CC
>1V, I
SINK
=50µA, T
A
=-40~+85°C
V
IH
V
IL
MIN
1
3.89
140
3.5
40
µS
kΩ
ns
UIC811-C (3.08V)
(V
CC
=3.3V, T
A
= 25°C, unless otherwise specified)
PARAMETER
Operating Voltage Range
Supply Current
Reset Voltage Threshold
Reset Timeout Period
Reset Output Voltage
MR
Input Threshold
MR
Minimum Pulse Width
MR
to Reset Delay
MR
Pull-Up Resistance
MR
Glitch Immunity
2.31
10
UIC811-D (4.00V)
(V
CC
=5V, T
A
= 25°C, unless otherwise specified)
PARAMETER
Operating Voltage Range
Supply Current
Reset Voltage Threshold
Reset Timeout Period
Reset Output Voltage
MR
Input Threshold
MR
Minimum Pulse Width
MR
to Reset Delay
MR
Pull-Up Resistance
MR
Glitch Immunity
2.3
10
TYP MAX UNIT
6
V
5
15
µA
4.00 4.10
V
240 560 ms
V
0.4
V
0.3
V
V
0.8
V
µS
0.5
µS
40
kΩ
ns
20
100
10
UIC811-E (4.38V)
(V
CC
=5V, T
A
= 25°C, unless otherwise specified)
PARAMETER
Operating Voltage Range
Supply Current
Reset Voltage Threshold
Reset Timeout Period
Reset Output Voltage
MR
Input Threshold
MR
Minimum Pulse Width
MR
to Reset Delay
MR
Pull-Up Resistance
MR
Glitch Immunity
SYMBOL
TEST CONDITIONS
V
CC
T
A
=-40~+85°C
I
CC
V
CC
=5.0V, no load
V
TH
t
RST
V
OH
I
SOURCE
=800µA
V
CC
= V
TH
min, I
SINK
=3.2mA
V
OL
V
CC
>1V, I
SINK
=50µA, T
A
=-40~+85°C
V
IH
V
IL
MIN
1
4.25
140
3.5
2.3
10
TYP MAX UNIT
6
V
5
15
µA
4.38 4.50
V
240 560 ms
V
0.4
V
0.3
V
V
0.8
V
µS
0.5
µS
40
kΩ
ns
20
100
10
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