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HA16117F Datasheet CMOS Watchdog Timer

Manufacturer: Hitachi Semiconductor (now Renesas)

Overview: HA16117F Series CMOS Watchdog Timer.

Download the HA16117F datasheet PDF. This datasheet also includes the HA1 variant, as both parts are published together in a single manufacturer document.

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General Description

The HA16117F Series of ICs make a micro-processor (MPU) system fail-safe by monitoring its power supply to detect voltage drops, and monitoring a P-RUN (program running) pulse to detect system crashes.

Also referred to as watchdog timers, these devices are essential in systems that aim for high levels of crash protection.

Fabricated by a CMOS process, they consume little power and are ideally suited for batteryoperated systems.

Key Features

  • Low power consumption : Operating (ACC pin low) = 0.5 mW (Typ) : Standby (ACC pin high) = 0.2 mW (Typ).
  • Watchdog timer on/off control by ACC input signal.
  • Independent auto-reset high and low times (tRH and tRL).
  • Watchdog monitoring by frequency filtering (independent of duty cycle).
  • High-precision low voltage detection (±2%).
  • Space- and weight-saving 8-pin SOP package HA16117F Series Ordering Information The HA16117F Series includes three I.

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