Document
UNISONIC TECHNOLOGIES CO., LTD
UIC811
MICROPROCESSOR RESET CIRCUITS
3
CMOS IC
3
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 low RESET output which has already been guaranteed to remain asserted for at 140ms least while VCC rises above the designed threshold level.
FEATURES
2 1
SOT-23
(EIAJ SC-59)
2 1
SOT-23-3
(JEDEC TO-236)
3 4
3 4
2 1
12
SOT-143
SOT-343
* 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
Lead Free
Halogen Free
Package
Pin Assignment 1 234
Packing
UIC811L-x-AE2-2-R UIC811G-x-AE2-2-R SOT-23-3 RESET VCC GND - Tape Reel
UIC811L-x-AE2-3-R UIC811G-x-AE2-3-R SOT-23-3 GND RESET VCC
- Tape Reel
UIC811L-x-AE3-2-R UIC811G-x-AE3-2-R SOT-23 RESET VCC GND - Tape Reel
UIC811L-x-AE3-3-R UIC811G-x-AE3-3-R
SOT-23
GND RESET VCC
- Tape Reel
UIC811L-x-AD4-R
UIC811G-x-AD4-R
SOT-143 GND RESET MR
VCC Tape Reel
UIC811L-x-AL4-R
UIC811G-x-AL4-R
SOT-343 GND RESET MR
VCC Tape Reel
Note: Pin Assignment : x: Output Voltage, refer to Marking Information.
UIC811G-x-AE2-2-R
(1) Packing Type (2) Pin Assignment (3) Package Type (4) Output Voltage Code (5) Green Package
(1) R: Tape Reel (2) refer to Pin Assignment (3) AE2: SOT-23-3, AE3: SOT-23, AD4: SOT-143 (3) AL4: SOT-343 (4) x: Refer to Marking Information (5) G: Halogen Free and Lead Free, L: Lead Free
www.unisonic.com.tw Copyright © 2020 Unisonic Technologies Co., Ltd
1 of 8
QW-R502-317.P
UIC811
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
SOT-23 SOT-23-3
SOT-143
A : 2.63V B : 2.93V C : 3.08V D: 4.00V E: 4.38V F: 4.63V J: 5.00V
CMOS IC
MARKING 3
Voltage Code
UX
12 43
L: Lead Free G: Halogen Free
Pin Code
Voltage Code
UX
12 43
L: Lead Free G: Halogen Free
SOT-343
Voltage Code
UX
L: Lead Free G: Halogen Free
PIN CONFIGURATION
SOT-143
VCC MR 43
SOT-343
VCC MR 43
12
SOT-23-3/SOT-23
AE2-2/AE3-2
GND 3
AE2-3/AE3-3
VCC 3
1 GND
2 RESET
1 GND
2 RESET
PIN DESCRIPTION
1 RESET
2 VCC
1 GND
2 RESET
PIN NAME GND
RESET
MR
VCC
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.
Input of manual reset. A reset can be forced by a logic low on MR . As the MR is held low, the reset will
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.
UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw
2 of 8
QW-R502-317.P
UIC811
BLOCK DIAGRAM
CMOS IC
VCC
Reset Threshold MR
RESET GENERATOR
RESET GND
FUNCTIONAL DIAGRAM VCC
MR RESET
tRST
VTH
Reset Timing Diagram
tRST
UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw
3 of 8
QW-R502-317.P
UIC811
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER Input Voltage Input Current (VCC, MR )
SYMBOL VCC IIN
RATINGS -0.3~+6.0
20
UNIT V mA
Output Current ( RESET ) IOUT 20 mA
Rate of Rise
VCC(RR) 100 V/µs
Power Dissipation (TA =+70°C)
SOT-143 SOT-343 SOT-23/SOT-23-3
PD
320 250 mW 300
Operating Temperature
TOPR
-40 ~ +105
°C
Storage Temperature
TSTG
-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
UIC811-A (2.63V) (VCC =3V, TA = 25°C, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
Operating Voltage Range
VCC TA =-40~+85°C
Supply Current
ICC VCC=3.0V, no load
Reset Voltage Threshold
VTH
Reset Timeout Period
tRST
VOH ISOURCE =500µA
Reset Output Voltage
VOL
VCC = VTH min, ISINK =1.2mA VCC>1V, ISINK =50µA, TA =-40~+85°C
MR Input Threshold
VIH VIL
MR Minimum Pulse Width
MR to Reset Delay
MR Pull-Up Resistance
MR Glitch Immunity
UIC811-B (2.93V) (VCC =3.3V, TA= 25°C, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
Operating Voltage Range
VCC TA =-40~+85°C
Supply Current
ICC VCC=3.3V, no load
Reset Voltage Threshold
VTH
Reset Timeout Period
tRST
VOH ISOURCE =500µA
Reset Output Voltage
VOL
VCC = VTH min, ISINK =1.2mA VCC>1V, ISINK =50µA, TA =-40~+85°C
MR Input Threshold
VIH VIL
MR Minimum Pulse Width
MR to Reset Delay
MR Pull-Up Resistance
MR Glitch Immunity
MIN TYP MAX UNIT 1 6V 5 10 µA.