PCA2003 - NXP

PCA2003 CMOS

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 t.

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 consumption for the entire watch, due to self adaptation of the motor drive according to the required torque
 Reliable step de.