NXP Semiconductors PCA2000
The PCA2000 and PCA2001 are CMOS1 integrated circuits 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. The circuit supplies only the minimum drive current, which is necessary to ensure a correct motor step.| Part No. | PCA2000 |
|---|---|
| Datasheet | PCA2000 Download |
| Manufacturer |  NXP Semiconductors |
| Description | CMOS |
| Buy | Stock & Price |
FEATURES AND BENEFITS
● 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 power consumption, typical 90 nA
● One second output pulses for bipolar stepping motor
● Minimum power consumption for the entire watch, due to self adaptation of the motor drive according to the required torque
● Reliable step detection circuit
● Motor pulse width, pulse modulation, and pulse adaptation range programmable in a wide range, stored in OTP memory
● Stop function for accurate time setting and power saving during shelf life 1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 15. NXP Semiconductors PCA2000; PCA2001 32 kHz watch circuit with programmable adaptive motor pulse
● End Of Life (EOL) indi...
