SC70/µDFN, Single/Dual Low-Voltage, Low-Power µP Reset Circuits

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.

The MAX6381/MAX6384/MAX6387 have a push-pull active-low reset output. The MAX6382/MAX6385/MAX6388 have a push-pull active-high reset output, and the MAX6383/MAX6386/MAX6389/MAX6390 have an open-drain active-low reset output. The MAX6384/MAX6385/MAX6386 also feature a debounced manual reset input (with internal pullup resistor). The MAX6387/MAX6388/MAX6389 have an auxiliary input for monitoring a second voltage. The MAX6390 offers a manual reset input with a longer VCC reset timeout period (1120ms or 1200ms) and a shorter manual reset timeout (140ms or 150ms).

The MAX6381/MAX6382/MAX6383 are available in 3-pin SC70 and 6-pin µDFN packages and the MAX6384–MAX6390 are available in 4-pin SC70 and 6-pin µDFN packages.

Applications

* Computers * Controllers * Critical µP and µC Power Monitoring * Dual Voltage Systems * Intelligent Instruments * Portable Battery-Powered Equipment

* 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

* AEC-Q100 Qualified, Refer to Ordering Information for the Specific /V Trim Version