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AMIS-70020 - Power Failure Elapsed Time Counter

General Description

The AMIS-70020 is a timer IC that measures the duration of power failures of up to five hours.

The AMIS-70020 starts and stops counting automatically as it is triggered by the voltage of the input signal VCC.

Key Features

  • Measures the time elapsed during a power failure.
  • Measures up to five hours.
  • 1 second resolution (RC oscillator/1024).
  • Autonomous operation during power failure.
  • Auto switching to backup power.
  • Auto counter-start/stop function.
  • Maintenance free buffer capacitor www. DataSheet4U. com - 6 hours back-up with 10mF - Capacitor recharge management built in (no external diode needed).
  • Li-button cell - CR1220 (35mAh) supports up to 1.

📥 Download Datasheet

Datasheet Details

Part number AMIS-70020
Manufacturer AMI SEMICONDUCTOR
File Size 365.98 KB
Description Power Failure Elapsed Time Counter
Datasheet download datasheet AMIS-70020 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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AMIS-70020 Power Failure Elapsed Time Counter 1.0 General Description The AMIS-70020 is a timer IC that measures the duration of power failures of up to five hours. The AMIS-70020 starts and stops counting automatically as it is triggered by the voltage of the input signal VCC. When VCC gets lower than the reference signal VDD - VTH, a power cut-off is flagged and the AMIS-70020 starts counting. During the counting phase the AMIS-70020 is powered by an external capacitor or by a primary battery and consequently operates independently of an external power supply. Due to the low power design of the AMIS-70020, the device can count the full scale autonomously using the energy stored in a 10mF capacitor. As soon as VCC comes up again counting stops.