• Precision Measurement Technologies
  • Technology Center for

AS1909 Supervisor IC

Low-Voltage μP Supervisory Circuit, Open-Drain Reset

The AS1909 (open drain output with active low reset) is a low voltage supervisory circuit device. Reset thresholds are factory programmable between 1.6V and 2.5V in steps of 100mV. The duration of the reset is 1.5/30/150ms (typ) after the supply voltage has risen above the threshold. The device operates down to 0.7V.

Block diagram of the AS1909 Supervisor IC

Key Features

  • Tiny package
  • Wide operating temperature range

Key Benefits

  • Small footprint
  • Suitable for automotive applications

AS1909 Applications

  • Cordless and Mobile Phones
  • MP3 Players
  • CD and DVD Players
  • PDAs
  • Handheld Computers
  • Digital Cameras
  • Hard Drives
  • Applications Where Power Supply Supervisory Control is Required.

AS1909 Product Facts

Supervised voltages [V (IN1)] 1.6 to 2.5
Supervised voltages [V (IN2)]
Supervised voltages [V (IN3)]
Supervised voltages [V (IN4)]
Inputs 1
Push/Pull active low
Push/Pull active high
Open-Drain
Watchdog
Man. reset
Supply current [μA] 2.6
Supply voltage [V] 0.7 to 3.6
Package SOT23-3