Datasheet4U Logo Datasheet4U.com

UM807 - uP Reset Circuits

General Description

The UM807/821/822 are low-power microprocessor (μP) supervisory circuits used to monitor power supplies in μP and digital systems.

They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V-powered or 3V-powered circuits.

Key Features

  • z Set-Top Boxes z Consumer Electronics z DVD Players z Cable/DSL Modems z MP3 Players z Industrial Equipments z Automotive z Medical Devices z No External Components z VCC Transient Immunity z Correct Logic Output Guaranteed to VCC=1.0V z Precision VCC Monitoring of 3.0V, 3.3V and 5.0V Supplies z 2μA Supply Current z 140ms Minimum Power-On Reset Pulse Width z Available in 3 Manual Reset Setup Periods (tMR): A: 10.08s B: 6.72s C: 1.68s z Available in 3 Output Con_f__i_g__u__r_a__t_i_ons: Open-D.

📥 Download Datasheet

Datasheet Details

Part number UM807
Manufacturer Union Semiconductor
File Size 322.08 KB
Description uP Reset Circuits
Datasheet download datasheet UM807 Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
UM807 15 Watt DC-DC Converters UNIVERSAL MICROELECTRONICS
UM800 15 Watt DC-DC Converters UNIVERSAL MICROELECTRONICS
UM801 15 Watt DC-DC Converters UNIVERSAL MICROELECTRONICS
UM802 15 Watt DC-DC Converters UNIVERSAL MICROELECTRONICS
UM803 15 Watt DC-DC Converters UNIVERSAL MICROELECTRONICS

Other Datasheets by Union Semiconductor

Part Number Description
UM803 3-Pin Microprocessor Reset Circuits
UM805 4-Pin uP Voltage Monitors
UM809 3-Pin Microprocessor Reset Circuits
UM810 3-Pin Microprocessor Reset Circuits
UM811 4-Pin uP Voltage Monitors

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
UM807/821/822 μP Reset Circuits with Long Manual Reset Setup Period UM807/821/822 SOT143 General Description The UM807/821/822 are low-power microprocessor (μP) supervisory circuits used to monitor power supplies in μP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V-powered or 3V-powered circuits. The UM807/821/822 also provide a debounced manual reset input with long setup period. On all devices, the reset output asserts when the VCC supply voltage drops below its specified threshold. The reset output remains asserted for the reset timeout period (240ms typ) after VCC rises above the reset threshold.