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AS1918 Supervisor IC

Microprocessor Supervisory Circuits with Manual Reset and Watchdog

The AS1918 (open drain output with active low reset) is a supervisor with manual reset and watchdog. Reset thresholds are factory programmable between 1.8V and 3.6V in steps of 100mV. The duration of the reset is fixed at 215ms, watchdog timeout is 1.5s. The device operates down to 1V.

Block diagram of the AS1918 Supervisor IC

Key Features

  • No external components
  • Integrated watchdog

Key Benefits

  • Small BOM
  • Blocks runaway code

AS1918 Applications

  • Portable & Battery Powered Systems
  • Embedded Controllers
  • Intelligent Instruments
  • Automotive Systems
  • Critical CPU Monitoring

AS1918 Product Facts

Supervised voltages [V (IN1)] 1.58 to 3.6
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] 5.5
Supply voltage [V] 1.0 to 3.6
Package SOT23-5