UM803 Datasheet 3-Pin Microprocessor Reset Circuits

Manufacturer: Union Semiconductor

UM803 3-pin microprocessor reset circuits by Union Semiconductor - Datasheet Preview

Datasheet Details

Part number	UM803
Manufacturer	Union Semiconductor
File Size	251.59 KB
Description	3-Pin Microprocessor Reset Circuits
Datasheet	UM803 Datasheet

General Description

The UM803 is a microprocessor (μP) supervisory circuit used to monitor the power supplies in μP and digital systems.

It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with +5V, +3.3V, +3.0V or +2.5V powered circuits.

The circuit performs a single function: it asserts a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold.

Overview

UM803 3-Pin Microprocessor Reset Circuits UM803 SOT323/SOT23-3.

Key Features

z Computers z Controllers z Portable/Battery-Powered Equipments z Intelligent Instruments z Critical μP and μC Power Monitoring z Automotive z No External Components z Power Supply Transient Immunity z Guaranteed Reset Valid to VCC=+1V z Precision VCC Monitoring of +2.5V, +3V, +3.3V and +5V Supplies z Fully Specified Over Temperature z 2μA Supply Current z 140ms Minimum Power-On Reset Pulse Width z Available in One Output C__o__n__f_i_g__u__r_ation: Open-Drain Active-Low RESET Output z 3-Pin S.

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