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Analog Devices / Maxim Integrated MAX6381-90 Microprocessor Supervisory Circuit

Analog Devices MAX6381-90 Microprocessor Supervisory Circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3μA of supply current at +1.8V. MAX6381/MAX6384/MAX6387 have a push-pull active-low reset output. MAX6382/MAX6385/MAX6388 have a push-pull active-high reset output, and MAX6383/MAX6386/MAX6389/MAX6390 have an open-drain active-low reset output. MAX6384/MAX6385/MAX6386 also feature a debounced manual reset input (with internal pullup resistor). MAX6387/MAX6388/MAX6389 have an auxiliary input for monitoring a second voltage. 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).

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)

Applications

  • Computers
  • Controllers
  • Intelligent instruments
  • Critical microprocessor and microcontroller power monitoring
  • Portable/battery-powered equipment
  • Dual voltage systems
Published: 2012-05-24 | Updated: 2025-08-25