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Product Detailed Parameters
- Description：IC WATCH CIRCUIT WAFER
- Package：Bulk
- Series：-
- Mfr：NXP USA Inc.
- Type：Watch Circuit
- Applications：Wrist Watches
- Mounting Type：Surface Mount
- Package / Case：Die
- Supplier Device Package：Wafer
- Grade：-
- Qualification：-
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Overview
The PCA2000U/10AC/1 is a CMOS integrated circuit designed for battery-operated wrist watches, utilizing a 32 kHz quartz crystal and a bipolar 1 Hz stepping motor. It features an amplitude-regulated oscillator with excellent frequency stability and programmable digital time calibration stored in One Time Programmable (OTP) memory. The device includes adaptive motor pulse modulation to minimize power consumption, achieving typical standby currents of 90 nA. Key functions include End Of Life (EOL) indication for silver oxide or lithium batteries, step detection, and test modes.
Feature Summary
- Amplitude-regulated 32 kHz quartz crystal oscillator with high immunity to leakage currents
- Electrically programmable time calibration with 1 ppm resolution stored in OTP memory
- Adaptive motor drive that adjusts current based on required torque for minimum power consumption
- End Of Life (EOL) warning function indicating low battery voltage via motor pulse changes
Applications
- Driver circuits for bipolar stepping motors
- High immunity motor drive circuits
- Battery operated wrist watches
Procurement Notes
Verify the specific ordering suffix '10' corresponds to the sawn wafer on Film Frame Carrier (FFC) delivery form as defined in the NXP datasheet. Confirm the package type matches the wire bond die specification. Ensure compatibility with the intended watch assembly process for the bare die configuration.
Selection Notes
Select this component for applications requiring ultra-low power consumption and precise timekeeping in wrist watches. The PCA2000 variant provides EOL functionality, whereas the PCA2001 does not. Consider the OTP programming requirements for time calibration and motor pulse parameters during the design phase.
Part Context
This part belongs to the PCA200x family of 32 kHz watch circuits. It is functionally similar to the PCA2001 but includes the additional EOL feature. Other variants in the series include different packaging options such as WLCSP8 or standard wire bond dies in trays.
Replacement Considerations
The PCA2001U/10AC/1 is a compatible alternative if the End Of Life (EOL) indication feature is not required. Both parts share identical pinouts, electrical characteristics, and OTP programming procedures.
