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AS1923 Supervisor IC

Quad-Voltage Supervisory Circuit

The AS1923 (open drain output with active low reset) monitors up to 4 supply rails with factory trimmed reset thresholds (also externally tunable) and operational accuracy to 5 or 10%. The IC operates down to 1V and draws 55uA typ.

Block diagram of the AS1923 Supervisor IC

Key Features

  • Monitors 4 supply rails
  • Tiny package
  • Factory programmable thresholds

Key Benefits

  • Monitor all system supply rails
  • Small footprint
  • Customisable

AS1923 Applications

  • Portable & Battery Powered Systems
  • Embedded Controllers
  • Intelligent Instruments
  • Automotive Systems
  • Embedded Controllers
  • Critical CPU Monitoring
  • Multi-Supply Applications

AS1923 Product Facts

Supervised voltages [V (IN1)] 5.0, Adj.
Supervised voltages [V (IN2)] 3.3, 3.0
Supervised voltages [V (IN3)] 2.5, 1.8, Adj
Supervised voltages [V (IN4)] -5.0, 1.8, Adj
Inputs 4
Push/Pull active low
Push/Pull active high
Man. reset
Supply current [μA] 6.5
Supply voltage [V] 1.0 to 3.6
Package SOT23-5