PCA2003U/10AC/1,00

Overview

The PCA2003U/10AC/1,00 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 high immunity to leakage currents. The device includes electrically programmable time calibration with 1 ppm resolution stored in One Time Programmable (OTP) memory. Typical supply current is 90 nA. It offers adaptive motor pulse modulation to minimize power consumption based on required torque. The component is supplied as a wire bond die.

Feature Summary

• Amplitude-regulated 32 kHz quartz crystal oscillator with 1 ppm programmable digital frequency adjustment
• Adaptive motor pulse adaptation function supplies minimum drive current necessary for correct motor steps
• Electrically programmable time calibration stored in OTP memory via supply voltage modulation
• Five different programmable output periods ranging from 1 s to 30 s

Applications

• Driver circuits for bipolar stepping motors
• High immunity motor drive circuits
• Battery operated wrist watches

Procurement Notes

Verify the package type is a wire bond die on a sawn wafer on film frame carrier. Confirm the operating temperature range is -10 °C to +60 °C. Ensure programming equipment supports the specific voltage modulation requirements for OTP writing. Check that the application design accounts for the bare die form factor and bonding pad layout.

Selection Notes

Select this component for applications requiring low power consumption in analog wrist watches. The adaptive motor drive reduces overall watch power usage by adjusting duty cycles based on torque needs. Consider the OTP programming complexity if post-assembly calibration is required. Verify compatibility with the specific bipolar stepping motor used in the design.

Part Context

The PCA2003U/10AC/1,00 belongs to the PCA200x series of 32 kHz watch circuits. It is part of NXP's portfolio of specialized ICs for consumer electronics. The 'U' suffix indicates the wire bond die package variant. This family focuses on providing reliable timing and motor control for traditional analog timepieces.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.