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General Description

The MAX6391/MAX6392 microprocessor (?P) supervisory circuits provide sequenced logic reset outputs for multi component or dual-voltage systems. Each device can monitor two supply voltages and time-sequence two reset outputs to control the order in which system components are turned on and off. The MAX6391/MAX6392 increase system reliability and reduce circuit complexity and cost compared to separate ICs or discrete components.

Features

? Preset VCC Reset Threshold Voltages from 1.58V to 4.63V (master supply)

? Customer-Adjustable RESET IN2 to Monitor Voltages Down to 625mV (secondary supply)

? Fixed (140ms min) RESET1 Timeout

? Fixed (140ms min) or Customer-Adjustable RESET2 Timeout Period

? Guaranteed Reset Valid to VCC = 1V

? Active-Low Open-Drain Outputs or Push Pull/Open-Drain Combination

? Internal Open-Drain Pullup Resistors (for external VOH voltage connections)

? Manual Reset Input (MAX6392 only)

? Immune to Short Negative VCC Transients

? 15?A Typical Supply Current

? Few External Components

? Small 8-Pin SOT23 Package