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PCA1465 - CMOS

General Description

The PCA146x series devices are CMOS integrated circuits specially suited for battery-operated, quartz-crystal-controlled wrist-watches, with a bipolar stepping motor.

Key Features

  • 32 kHz oscillator, amplitude regulated with excellent frequency stability.
  • High immunity of the oscillator to leakage currents.
  • Time calibration electrically programmable and reprogrammable (via EEPROM).
  • A quartz crystal is the only external component required.
  • Very low current consumption; typically 170 nA.
  • Output for bipolar stepping motors of different types.
  • Up to 50% reduction in motor current compared with conventional circuit.

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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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INTEGRATED CIRCUITS DATA SHEET PCA146x series 32 kHz watch circuits with adaptive motor pulse Product specification Supersedes data of 1998 Mar 18 File under Integrated Circuits, IC16 1998 Apr 21 Philips Semiconductors Product specification 32 kHz watch circuits with adaptive motor pulse FEATURES • 32 kHz oscillator, amplitude regulated with excellent frequency stability • High immunity of the oscillator to leakage currents • Time calibration electrically programmable and reprogrammable (via EEPROM) • A quartz crystal is the only external component required • Very low current consumption; typically 170 nA • Output for bipolar stepping motors of different types • Up to 50% reduction in motor current compared with conventional circuits, by self adaption of the motor pulse width to match t