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AS1917 Supervisor IC

Microprocessor supervisory circuits with manual reset and watchdog


  • No external components
  • Integrated watchdog


  • Small BOM
  • Blocks runaway code

Product parameters

Supervised Voltages [V (IN1)] 1.58 to 3.6
Inputs 1
Push/Pull Active Low No
Push/Pull Active High Yes
Open-Drain No
Watchdog Yes
Man. Reset Yes
Supply Current [µA] 5.5
Supply Voltage [V] 1.0 to 3.6
Package SOT23-5

General Description

The AS1917 (push-pull driver with active high 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.

Not Recommended for New Designs
ams AG is discontinuing production of this device. Final lifetime buy order must be placed by June 30, 2021. Please contact your local sales representative for further information.

This product suits for the following applications:

  • Portable and battery-powered systems
  • Embedded controllers
  • Intelligent instruments
  • Automotive systems
  • Critical CPU monitoring

Technical Documents

Type Description Language
Datasheet Document version 1.04 English


Type Description Language
EoL Notification AS1xxx, AS25xx, AS3xxx, AS73211, AS89020, SL900A, TMD4704 (issued 2020-Dec) English

Other Information

Type Description Language
Block Diagram AS1917 Block Diagram English
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