PCA2002U/10AB/1,00

Overview

The PCA2002U/10AB/1 is a CMOS integrated circuit designed for battery-operated wrist watches, utilizing a 32 kHz quartz crystal and bipolar stepping motor. It features an amplitude-regulated oscillator with excellent frequency stability and high immunity to leakage currents. The device offers electrically programmable time calibration with 1 ppm resolution stored in One Time Programmable (OTP) memory. Key electrical characteristics include a typical supply current of 90 nA between motor pulses and a supply voltage range of 1.1 V to 3.6 V. It supports five programmable output periods from 1 s to 30 s and pulse widths between 1 ms and 8 ms.

Feature Summary

• Amplitude-regulated 32 kHz quartz crystal oscillator with integrated capacitance of 5.2 pF
• Electrically programmable time calibration with 1 ppm resolution via OTP memory
• Very low current consumption: typically 90 nA between motor pulses
• Programmable output periods (1 s, 5 s, 10 s, 20 s, 30 s) and pulse widths (1 ms to 8 ms)

Applications

• Driver circuits for bipolar stepping motors in wrist watches
• High immunity motor drive circuits for precision timekeeping
• Battery-operated watch systems requiring minimal external components

Procurement Notes

Verify the specific ordering suffix /10AB/1 corresponds to the sawn wafer on Film Frame Carrier (FFC) packing method as defined in the datasheet. Confirm that the bare die dimensions (1.16 x 0.86 mm) and wire bond pad configuration match the assembly requirements. Ensure handling procedures account for the ESD sensitivity (HBM ±2000 V) and storage conditions (-30 °C to +100 °C).

Selection Notes

Select this component for applications requiring a single-chip solution for quartz crystal oscillation and bipolar motor driving. The OTP programming capability allows for post-assembly time calibration, compensating for oscillator frequency offsets. Consider the -10 °C to +60 °C ambient temperature range and the 1.1 V to 3.6 V supply voltage compatibility with standard watch batteries.

Part Context

This part belongs to the PCA200x family of watch circuits. Other variants include the PCA2002U/AB/1 (tray packed) and PCA2002DUS/DA (WLCSP package). The U-series denotes the wire bond die format, while the D-series uses Wafer Level Chip-Scale Packaging. All variants share the same functional core but differ in packaging and handling specifications.

Replacement Considerations

Direct replacements within the PCA200x family include PCA2002U/AB/1 for tray-packed dies or PCA2002DUS/DA for WLCSP packages. Ensure form, fit, and function compatibility regarding pinout and OTP programming sequences when substituting.