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PCA2002

Features: · 32 kHz quartz oscillator, amplitude regulated with excellent frequency stability and high immunity to leakage currents· Electrically programmable time calibration with 1 ppm resolution (stored in OTP memory)· The quartz crystal is the only external component required· Very low current ...

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SeekIC No. : 004456224 Detail

PCA2002: Features: · 32 kHz quartz oscillator, amplitude regulated with excellent frequency stability and high immunity to leakage currents· Electrically programmable time calibration with 1 ppm resolution (...

PCA2002 Data Sheet

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Part Number:
PCA2002
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· 32 kHz quartz oscillator, amplitude regulated with excellent frequency stability and high immunity to leakage currents
· Electrically programmable time calibration with 1 ppm resolution (stored in OTP memory)
· The quartz crystal is the only external component required
· Very low current consumption: typically 90 nA
· Output pulses for bipolar stepping motors
· Five different programmable output periods (1 s to 30 s)
· Output pulse width programmable between 1 ms and 8 ms
· Full or chopped motor pulse and pulse stretching, selectable
· Stop function for accurate time setting and current saving during the shelf life
· Test mode for accelerated testing of the mechanical parts of the watch.


Pinout

Connection Diagram


Description

The PCA2002 is a CMOS integrated circuit for battery operated wrist watches with a 32 kHz quartz crystal as the timing element and a bipolar stepping motor. The crystal oscillator ofPCA2002 and the frequency divider are optimized for minimum current consumption. A timing accuracy of 1 ppm is achieved with a programmable, digital frequency adjustment.

The output period of PCA2002 and the output pulse width can be programmed. It can be selected between a full output pulse or a chopped output pulse with a duty cycle of 75 %. In addition, a stretching pulse can be added to the primarydriving pulse. Pin RESET is used for stopping the motor, accurate time setting and for an accelerated testing of the watch.




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