UIC811G-C-AD4-R [UTC]
Power Supply Support Circuit, Fixed, 1 Channel, PDSO4, HALOGEN FREE, SOT-143, 4 PIN;
| 型号： | UIC811G-C-AD4-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | Power Supply Support Circuit, Fixed, 1 Channel, PDSO4, HALOGEN FREE, SOT-143, 4 PIN 光电二极管 |
| 文件： | 总8页 (文件大小：266K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
UIC811
CMOS IC
MICROPROCESSOR RESET
CIRCUITS
DESCRIPTION
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 lowRESET output which has already
been guaranteed to remain asserted for at 140ms least while VCC
rises above the designed threshold level.
FEATURES
* Voltage monitor for 3V or 3.3V or 5V power supplies
* Valid RESET remains with VCC as low as 1V
* Typical supply current: 5µA
* Fixed 140ms minimum reset pulse width
* With Manual reset input
ORDERING INFORMATION
Ordering Number
Pin Assignment
Package
Packing
Lead Free
Halogen Free
1
2
3
4
UIC811L-x-AD4-R
UIC811G-x-AD4-R
UIC811G-x-AL4-R
UIC811G-x-AE2-2-R
UIC811G-x-AE2-3-R
UIC811G-x-AE3-2-R
UIC811G-x-AE3-3-R
SOT-143
SOT-343
SOT-23-3
SOT-23-3
SOT-23
GND
VCC
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Reel
RESET
RESET
RESET
GND
MR
UIC811L-x-AL4-R
UIC811L-x-AE2-2-R
UIC811L-x-AE2-3-R
UIC811L-x-AE3-2-R
UIC811L-x-AE3-3-R
GND
VCC
VCC
MR
GND
VCC
GND
VCC
-
-
-
-
RESET
VCC
RESET
GND
SOT-23
RESET
Note: Pin Assignment : x: Output Voltage, refer to Marking Information.
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Copyright © 2013 Unisonic Technologies Co., Ltd
QW-R502-317.L
UIC811
CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
SOT-143
A : 2.63V
B : 2.93V
C : 3.08V
D: 4.00V
E: 4.38V
F: 5.00V
SOT-343
3
G: Halogen Free
L: Lead Free
SOT-23
SOT-23-3
UX
Voltage Code
Pin Code
2
1
PIN CONFIGURATION
SOT-23-3/SOT-23
SOT-143
SOT-343
AE2-2/AE3-2
AE2-3/AE3-3
GND
VCC
3
3
2
1
2
1
VCC
GND
RESET
RESET
PIN DESCRIPTION
PIN NAME
GND
DESCRIPTION
Ground
This pin will fall low after the VCC’s falling below the reset threshold voltage and it also can remain
asserted for at least 140ms min after VCC’s rising upon the reset threshold.
RESET
Input of manual reset. A reset can be forced by a logic low onMR . As the MR is held low, the reset wil
MR
VCC
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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UIC811
CMOS IC
BLOCK DIAGRAM
2
1
RESET
VCC
4
3
RESET
GENERATOR
Reset
Threshold
MR
GND
FUNCTIONAL DIAGRAM
VCC
VTH
MR
tRST
tRST
RESET
Reset Timing Diagram
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UIC811
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
VCC
RATINGS
-0.3~+6.0
20
UNIT
V
Input Voltage
IIN
mA
Input Current (VCC,MR )
Output Current (RESET )
Rate of Rise
IOUT
20
mA
VCC(RR)
100
320
V/µs
SOT-143
Power Dissipation
(TA =+70°C)
SOT-343
PD
250
mW
SOT-23/SOT-23-3
300
Operating Temperature
Storage Temperature
TOPR
TSTG
-40~+105
-65~+150
°C
°C
Note: 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
UIC811-A (2.63V) (VCC =3V, T = 25
,
°C unless otherwise specified)
A
PARAMETER
Operating Voltage Range
Supply Current
SYMBOL TEST CONDITIONS
TA =-40~+85°C
MIN TYP MAX UNIT
VCC
ICC
1
6
V
µA
V
VCC=3.0V, no load
5
10
Reset Voltage Threshold
Reset Timeout Period
VTH
tRST
VOH
2.55 2.63 2.70
140 240 560 ms
ISOURCE =500µA
2.4
V
V
VCC = VTH min, ISINK =1.2mA
VCC>1V, ISINK =50µA, TA =-40~+85°C
0.3
0.3
Reset Output Voltage
VOL
V
VIH
VIL
2.1
10
V
MR Input Threshold
0.75
V
µS
MR Minimum Pulse Width
MR to Reset Delay
0.5
20
µS
kΩ
ns
10
30
MR Pull-Up Resistance
MR Glitch Immunity
100
UIC811-B (2.93V) (VCC =3.3V, T = 25
,
°C unless otherwise specified)
A
PARAMETER
Operating Voltage Range
Supply Current
SYMBOL TEST CONDITIONS
MIN TYP MAX UNIT
VCC
ICC
TA =-40~+85°C
1
6
V
µA
V
VCC=3.3V, no load
5
10
Reset Voltage Threshold
Reset Timeout Period
VTH
tRST
VOH
2.85 2.93 3.00
140 240 560 ms
ISOURCE =500µA
2.64
V
V
VCC = VTH min, ISINK =1.2mA
VCC>1V, ISINK =50µA, TA =-40~+85°C
0.3
0.3
Reset Output Voltage
VOL
V
VIH
VIL
2.31
10
V
MR Input Threshold
0.825
V
µS
MR Minimum Pulse Width
MR to Reset Delay
0.5
20
µS
kΩ
ns
10
30
MR Pull-Up Resistance
MR Glitch Immunity
100
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UIC811
CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
UIC811-C (3.08V) (VCC =3.3V, T = 25
,
°C unless otherwise specified)
A
PARAMETER
Operating Voltage Range
Supply Current
SYMBOL TEST CONDITIONS
MIN TYP MAX UNIT
VCC
ICC
TA =-40~+85°C
1
6
V
µA
V
VCC=3.3V, no load
5
10
Reset Voltage Threshold
Reset Timeout Period
VTH
tRST
VOH
3.00 3.08 3.15
140 240 560 ms
ISOURCE =500µA
2.64
V
V
VCC = VTH min, ISINK =1.2mA
VCC>1V, ISINK =50µA, TA =-40~+85°C
0.3
0.3
Reset Output Voltage
VOL
V
VIH
VIL
2.31
10
V
MR Input Threshold
0.825
V
µS
MR Minimum Pulse Width
MR to Reset Delay
0.5
20
µS
kΩ
ns
10
30
MR Pull-Up Resistance
MR Glitch Immunity
100
UIC811-D (4.00V) (VCC =5V, T = 25
,
°C unless otherwise specified)
A
PARAMETER
Operating Voltage Range
Supply Current
SYMBOL
VCC
TEST CONDITIONS
TA =-40~+85°C
MIN TYP MAX UNIT
1
6
V
µA
V
ICC
VCC=5.0V, no load
5
15
Reset Voltage Threshold
Reset Timeout Period
VTH
3.89 4.00 4.10
tRST
140 240 560 ms
VOH
ISOURCE =800µA
3.5
V
V
VCC = VTH min, ISINK =3.2mA
VCC>1V, ISINK =50µA, TA =-40~+85°C
0.4
0.3
Reset Output Voltage
VOL
V
VIH
VIL
2.3
10
V
MR Input Threshold
0.8
V
µS
MR Minimum Pulse Width
MR to Reset Delay
0.5
20
µS
kΩ
ns
10
30
MR Pull-Up Resistance
MR Glitch Immunity
100
UIC811-E (4.38V) (VCC =5V, T = 25
,
°C unless otherwise specified)
A
PARAMETER
Operating Voltage Range
Supply Current
SYMBOL
VCC
TEST CONDITIONS
TA =-40~+85°C
MIN TYP MAX UNIT
1
6
V
µA
V
ICC
VCC=5.0V, no load
5
15
Reset Voltage Threshold
Reset Timeout Period
VTH
4.25 4.38 4.50
tRST
140 240 560 ms
VOH
ISOURCE =800µA
3.5
V
V
VCC = VTH min, ISINK =3.2mA
VCC>1V, ISINK =50µA, TA =-40~+85°C
0.4
0.3
Reset Output Voltage
VOL
V
VIH
VIL
2.3
10
V
MR Input Threshold
0.8
V
µS
MR Minimum Pulse Width
MR to Reset Delay
0.5
20
µS
kΩ
ns
10
30
MR Pull-Up Resistance
MR Glitch Immunity
100
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UIC811
CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
UIC811-F (5.0V) (VCC =5.5V, T = 25
,
°C unless otherwise specified)
A
PARAMETER
Operating Voltage Range
Supply Current
SYMBOL TEST CONDITIONS
TA =-40~+85°C
MIN TYP MAX UNIT
VCC
ICC
1
6
V
µA
V
VCC=5.0V, no load
25
Reset Voltage Threshold
Reset Timeout Period
VTH
tRST
VOH
4.85
5
5.15
140 240 560 ms
ISOURCE =800µA
4.55
V
V
VCC = VTH min, ISINK =3.2mA
VCC>1V, ISINK =50µA, TA =-40~+85°C
0.4
0.3
Reset Output Voltage
VOL
V
VIH
VIL
2.45
10
V
MR Input Threshold
0.8
V
µS
MR Minimum Pulse Width
MR to Reset Delay
0.5
20
µS
kΩ
ns
10
30
MR Pull-Up Resistance
MR Glitch Immunity
100
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UIC811
CMOS IC
TYPICAL APPLICATION CIRCUIT
VCC
VCC
VCC
UTC
µP
UIC811
RESET
RESET
MR
APPLICATION INFORMATION
Microprocessor Reset
As soon as VCC falls below the reset threshold voltage, the RESET pin is asserted. But the RESET pin can
keep asserted for a period of 140ms after VCC rose above the reset threshold voltage. After a power failure the reset
operation can keep the processor being reset and powers up properly.
VCC Transients
The UTC UIC811 series won’t cause a reset typically as this situation: a negative-going transient 125mV below
the reset threshold with a duration of 20µs or less.
Interfacing to Bidirectional Reset Pins
Connecting a 4.7kΩ resistor in series with the UTC UIC811 series output and the µP reset pin can make the
UTC UIC811 series interface with µPs with bidirectional reset pins.
RESET Valid at Low Voltage
As the figure below, adding a resistor which is recommended 100kΩ can ensure the RESET output remains
low with VCC down to 0V. The size of the resistor should be not too large which will load the output excessively and
not too small which can pull-down any stray leakage currents.
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UIC811
CMOS IC
TYPICAL CHARACTERISTICS
Reset Timeout out Period
Reset Timeout out Period
CH1：VCC
CH2：Reset
CH1：MR
CH2：Reset
MR to Reset Delay
CH1：MR
CH2：Reset
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.
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