ACTIVE
Part Number
UM811
Status
ACTIVE
Watchdog
No
Output driver type/Reset outpt
Push-pull, Active-low
Manual Reset Input
Yes
PFI Option
No
Typical Threshold Voltage (V)
2.32, 2.63, 2.93, 3.08, 4, 4.38, 4.63
VCC Range (V)
1 to 5.5
Iq(typ) (mA)
0.002
Time delay (ms)
240
Features
Push-pull output, Manual Reset Input
Operating Temperature Range (℃)
-40 to 85
Package
SOT143
The UM811 is low-power microprocessor (μP) supervisory circuit used to monitor power supplies in μP and digital systems. The device provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V-powered or 3V-powered circuits. The UM811 also provides a debounced manual reset input.
The device performs a single function: The device asserts a reset signal whenever the VCC supply voltage falls below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. Reset thresholds are available for operation with a variety of supply voltages.
The UM811 has push-pull outputs. The 811 has an active-low /RESET output. The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCC down to 1V.
Low supply current makes the UM811 ideal for use in portable equipments. The device comes in a 4-pin SOT143 package.
- No External Components
- VCC Transient Immunity
- Guaranteed Reset Valid to VCC=1.0V
- Precision VCC Monitoring of 3.0V, 3.3V and 5.0V Supplies
- 2μA Supply Current
- 140ms Minimum Power-On Reset Pulse Width
- Guaranteed Over Temperature
- Available in One Output Configuration: Push-Pull Active-Low /RESET Output
- 4-Pin SOT143 Package
- Wide Operation Temperature: -40°C to +85°C
- Computers
- Controllers
- Portable/Battery-Powered Equipments
- Intelligent Instruments
- Critical μP and μC Power Monitoring
| Part Number | Packaging Type | Marking Code | Shipping Qty |
|---|---|---|---|
| UM811xE | SOT143 | 11x | 3000pcs/7Inch Tape & Reel |
