PCA2002 - NXP

PCA2002 CMOS

The PCA2002 is a CMOS1 integrated circuit for battery operated wrist watches with a 32 kHz quartz crystal as the timing element and a bipolar stepping motor. The quartz crystal oscillator 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 outpu.

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 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.