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General Description

The MAX6746–MAX6753 low-power microprocessor (μP) supervisory circuits monitor single/dual system supply voltages from 1.575V to 5V and provide maximum adjustability for reset and watchdog functions. These devices assert a reset signal whenever the VCC supply voltage or RESET IN falls below its reset thresh old or when manual reset is pulled low. The reset output remains asserted for the reset timeout period after VCC and RESET IN rise above the reset threshold. The reset function features immunity to power-supply transients.

Features

? Factory-Set Reset Threshold Options from 1.575V to 5V in ~100mV Increments

? Adjustable Reset Threshold Options

? Single/Dual Voltage Monitoring

? Capacitor-Adjustable Reset Timeout

? Capacitor-Adjustable Watchdog Timeout

? Min/Max (Windowed) Watchdog Option

? Manual Reset Input Option

? Guaranteed RESET Valid for VCC ≥ 1V

? 3.7μA Supply Current

? Push-Pull or Open-Drain RESET Output Options

? Power-Supply Transient Immunity

? Small 8-Pin SOT23 Packages

Applications

Medical Equipment

Automotive

Intelligent Instruments

Portable Equipment

Battery-Powered

Computers/Controllers

Embedded Controllers

Critical μP Monitoring

Set-Top Boxes

Computers