General Description

The MAX6381–MAX6390 microprocessor (μP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3μA of supply current at +1.8V. Whenever VCC falls below the factory-set reset thresholds, the reset output asserts and remains asserted for a minimum reset timeout period after VCC rises above the reset threshold. Reset thresholds are available from +1.58V to +4.63V, in approximately 100mV increments. Seven minimum reset timeout delays ranging from 1ms to 1200ms are available.

Features

? Factory-Set Reset Threshold Voltages Ranging from +1.58V to +4.63V in Approximately 100mV Increments

? ±2.5 Reset Threshold Accuracy Over Temperature (-40°C to +125°C)

? Seven Reset Timeout Periods Available: 1ms, 20ms, 140ms, 280ms, 560ms, 1120ms, 1200ms (min)

? 3 Reset Output Options

?? Active-Low Push-Pull

?? Active-High Push-Pull

?? Active-Low Open-Drain

? Reset Output State Guaranteed Valid Down to VCC = 1V

? Manual Reset Input (MAX6384/MAX6385/MAX6386)

? Auxiliary RESET IN (MAX6387/MAX6388/MAX6389)

? VCC Reset Timeout (1120ms or 1200ms)/Manual

????????? Reset Timeout (140ms or 150ms) (MAX6390)

? Negative-Going VCC Transient Immunity

? Low Power Consumption of 6μA at +3.6V and 3μA at +1.8V

? Pin Compatible with MAX809/MAX810/MAX803/MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348, and MAX6711/MAX6712/MAX6713

? Tiny 3-Pin/4-Pin SC70 and 6-Pin μDFN Packages

Applications

? Computers

? Controllers

? Intelligent Instruments

? Critical μP and μC

? Power Monitoring

? Portable/Battery

? Powered Equipment

? Dual Voltage Systems

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