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PCA2003 - CMOS

Description

The PCA2003 is a CMOS integrated circuit for battery operated wrist watches with a 32 kHz quartz crystal as timing element and a bipolar 1 Hz stepping motor.

The quartz crystal oscillator and the frequency divider are optimized for minimum power consumption.

Features

  • Amplitude-regulated 32 kHz quartz crystal oscillator, with excellent frequency stability and high immunity to leakage currents.
  • Electrically programmable time calibration with 1 ppm resolution stored in One Time Programmable (OTP) memory.
  • The quartz crystal is the only external component connected.
  • Very low supply current, typical 90 nA.
  • One second output pulses for bipolar stepping motor.
  • Five different programmable output periods (1 s to 30 s).
  • Minimum power.

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Datasheet preview – PCA2003

Datasheet Details

Part number PCA2003
Manufacturer NXP
File Size 337.91 KB
Description CMOS
Datasheet download datasheet PCA2003 Datasheet
Additional preview pages of the PCA2003 datasheet.

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Full PDF Text Transcription

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PCA2003 32 kHz watch circuit with programmable adaptive motor pulse and pulse period Rev. 5 — 1 May 2019 Product data sheet 1. General description The PCA2003 is a CMOS integrated circuit for battery operated wrist watches with a 32 kHz quartz crystal as timing element and a bipolar 1 Hz stepping motor. The quartz crystal oscillator and the frequency divider are optimized for minimum power consumption. A timing accuracy of 1 ppm is achieved with a programmable, digital frequency adjustment. To obtain the minimum overall power consumption for the watch, an automatic motor pulse adaptation function is provided. The circuit supplies only the minimum drive current, which is necessary to ensure a correct motor step.
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