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UM807 - uP Reset Circuits

Datasheet Summary

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.

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.

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Datasheet preview – UM807

Datasheet Details

Part number UM807
Manufacturer UniON Semiconductor
File Size 322.08 KB
Description uP Reset Circuits
Datasheet download datasheet UM807 Datasheet
Additional preview pages of the UM807 datasheet.

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Full PDF Text Transcription

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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.
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