General Description

The MAX6701–MAX6708 microprocessor (µP) supervisory circuits reduce the complexity and components required to monitor power-supply functions in µP systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components. The MAX6701–MAX6708 family provides four functions: a reset output during power-up, power-down, and brownout conditions; an independent watchdog output that goes low if the watchdog input has not been toggled within 1.6s; a 0.62V threshold detector for power-fail warning; and an active-low manual reset input.

Features

♦ Small 8-Pin SOT23 Package

♦ Precision Monitoring of +5.0V, +3.3V, +3.0V, +2.5V

Supply Voltages

♦ 140ms Reset Timeout Delay

♦ Power-Fail Input with Independent Output; Monitor Inputs Down to 0.62V (MAX6704–MAX6708)

♦ Dual Adjustable Reset Input for Triple-Voltage Monitoring (MAX6701(A)/MAX6702(A)/MAX6703(A))

♦ 1.6s Watchdog Timeout Period (MAX6701(A)–MAX6707(A))

♦ Independent Watchdog Output (MAX6701(A)/MAX6702(A)/MAX6703(A)/MAX6705(A)/MAX6706(A)/MAX6707(A))

♦ Manual Reset Input

♦ Four Reset Output Stage Options

   Active Low Push-Pull (MAX6701(A), MAX6705(A))

   Active Low Open Drain (MAX6703(A), MAX6707(A))

   Active High Push-Pull (MAX6702(A), MAX6706(A))

   Dual Active Low/High Push-Pull (MAX6704,MAX6708)

♦ Guaranteed Reset Valid to VCC = 1V

♦ Immune to Short Falling VCC Transients

♦ Low Cost, Few External Components

Applications

Computers

Controllers

Intelligent Instruments

Automotive Systems

Critical µP Power Monitoring

White Goods

Networking

Telecommunications