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MAX6705, MAX6705A：Low-Voltage, SOT23, µP Supervisors with Power-Fail In/Out, Manual Reset, and Watchdog Timer

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. The MAX6701—MAX6708 family offers several pinout options to accommodate a variety of multivoltage microprocessor supervision applications. The MAX6701(A)/MAX6702(A)/MAX6703(A) monitor three supply voltages (one fixed threshold and two adjustable) to drive a single reset output and include a manual reset input and a watchdog timer with an independent output. The MAX6704 monitors a single-supply voltage to drive complementary reset outputs and includes an independent adjustable power-fail-in/power-fail-out comparator, a manual reset input, and a reset-based watchdog timer. The MAX6705(A)/MAX6706(A)/MAX6707(A) monitor a single-supply voltage to drive a single reset output and include an independent adjustable power-fail-in/power-fail-out comparator, a manual reset input, and a watchdog timer with an independent output. The MAX6708 is the same as the MAX6704 but without the watchdog timer function. See the Detailed Description for differences between non-A and A versions.

Key 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 Guaranteed Reset Valid to VCC = 1V Immune to Short Falling VCC Transients Low Cost, Few External Components

MAX6701, MAX6701A, MAX6702, MAX6702A, MAX6703, MAX6703A: Pin Configuration Applications/Uses Computers Controllers Critical µP Power Monitoring Intelligent Instruments Networking Telecommunications White Goods

DataSheet

Parametrics

Quality and Environmental Data

• MAX6705.pdf

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