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AS1905 Supervisor IC

150nA Ultra Low Power μP Supervisory Circuit, Push-Pull Active-High Reset

The AS1905 (push-pull driver with active high reset) is an ultra low-power 150nA @ 3.3V) supervisory circuit device. Reset thresholds are factory programmable between 2.2V and 3.08V in steps of 100mV. The duration of the reset is 5/20/100/500ms (typ) after the supply voltage has risen above the threshold. The device operates down to 1V.

Block diagram of the AS1905 Supervisor IC

Key Features

  • 150nA quiescent current
  • Tiny package

Key Benefits

  • Always on applications
  • Small footprint

AS1905 Applications

  • Computers
  • Intelligent Instruments
  • Controllers
  • Critical Microprocessor and Microcontroller Power Monitoring
  • Portable Battery Powered Equipment
  • Automotive

AS1905 Product Facts

Supervised voltages [V (IN1)] 2.2 to 3.1
Supervised voltages [V (IN2)]
Supervised voltages [V (IN3)]
Supervised voltages [V (IN4)]
Inputs 1
Push/Pull active low
Push/Pull active high
Man. reset
Supply current [μA] 0.15
Supply voltage [V] 1.0 to 3.6
Package SOT23-3