Part Number
UM809
Status
ACTIVE
Watchdog
No
Output driver type/Reset outpt
Push-pull, Active-low
Manual Reset Input
No
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 7
Iq(typ) (mA)
0.003
Time delay (ms)
240
Features
Wide Operation Voltage Range
Operating Temperature Range (℃)
-40 to 85
Package
SOT323, SOT23-3
The UM809 is ultra low current, cost effective system supervisory circuit designed to monitor the power supplies in digital systems. The device provides a reset signal to the host processor when necessary, offer excellent circuit reliability & low cost by eliminating external component and adjustment when used with +5V, +3.3V, +3.0V or other voltage powered circuits.
The reset output is driven active within 10祍 of power supply falling through the reset voltage threshold. Reset is keeping active for a minimum of 140ms after system power supply has risen above the reset threshold. Reset threshold suitable for operation with variety of supply voltage are available.
UM809 has an active-low reset output. The UM809 is optimized to reject fast transient glitches on the power supply line, and the reset output is guaranteed to be in the correct logic state for power supply VCC down to 1V.
The device consists of a voltage reference comparator, resistors for detector threshold setting, delay generator, output driver & hysteresis circuit. The reset threshold & time delay are fixed with high accuracy internally and does not require any external adjustment.
Low supply current of 3礎 (VCC=3V) makes UM809 ideal for low power application. The device is available in 3 Pin SOT323 or SOT23 packages.
- Wide Operation Voltage Range of 1V to 7V
- Typical Quiescent Current of 3μA
- No External Components
- 3-Pin Small SOT323 and SOT23 Packages
- VCC Transient Immunity
- Correct Logic Output Guaranteed to VCC=1.0V
- Precision VCC Monitor for 2.5V, 3.0V, 3.3V and 5.0V Supplies
- Available in One Output Configuration: Push-Pull Low Active Reset Output
- Wide Operation Temperature: -40°C to +85°C
- CPU and Logic Circuit Reset
- Power Fail Detectors
- Computers
- Embedded Systems
- Battery-Powered Equipments
- Intelligent Instruments
Part Number | Packaging Type | Marking Code | Shipping Qty |
---|---|---|---|
UM809xS | SOT23-3 | XXX | 3000pcs/7Inch Tape & Reel |
UM809xP | SOT323 | VXX | 3000pcs/7Inch Tape & Reel |