MAX821 Datasheet - Maxim

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MAX821 4-Pin uP Voltage Monitors

19-1122; Rev 1; 12/99 4-Pin µP Voltage Monitors with Pin-Selectable Power-On Reset Timeout Delay General .
The MAX821/MAX822 microprocessor (µP) supervisory circuits monitor power supplies in µP and digital systems.

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Datasheet Details

Part number:

MAX821

Manufacturer:

Maxim

File Size:

77.48 KB

Description:

4-Pin uP Voltage Monitors

Features

* o Pin-Selectable, Precision Power-On Reset Delay: 1ms (max), 20ms (min), or 100ms (min) o Precision Monitoring of +3V to +5V Power-Supply Voltages o 2.5µA Supply Current o Guaranteed Over Temperature (-40°C to +125°C) o Guaranteed RESET Valid to VCC = 1V (MAX821) o Power-Supply Transient Immunity o

Applications

* Bar-Code Scanners Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable/Battery-Powered Equipment __________Typical Operating Circuit Pin Configuration VCC VCC TOP VIEW µP RESET INPUT (RESET) RESET 2 GND 1 4 VCC MAX821 MAX822 20ms 100ms 1ms RESET (RESET) GND

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MAX821 4-Pin Voltage Monitors Maxim

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