PCA2000U/AC/1,026

Description：IC WATCH CIRCUIT WAFER
Package：Tray

SKU:c241a17eb21d Category: Specialized ICs Brand: NXP USA Inc.

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Product introduction

Product Detailed Parameters

Description：IC WATCH CIRCUIT WAFER
Package：Tray
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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PCA2000U/AC/1,026

Overview

The PCA2000U/AC/1 is a CMOS integrated circuit designed for battery-operated wrist watches, utilizing a 32 kHz quartz crystal and a bipolar stepping motor. It features an amplitude-regulated oscillator with excellent frequency stability and programmable time calibration stored in One Time Programmable (OTP) memory. The device includes adaptive motor pulse modulation to minimize power consumption, achieving typical supply currents of 90 nA between pulses. It supports EOL indication for silver oxide or lithium batteries and offers test modes for accelerated mechanical testing.

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 with automatic step detection and variable duty cycle chopping
End Of Life (EOL) warning function for silver oxide or lithium batteries

Applications

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

Procurement Notes

Verify the specific delivery form required, as the PCA2000U/AC/1 is supplied as a wire bond die in a tray. Ensure compatibility with the assembly process for bare dies. Confirm that the programming equipment supports the voltage modulation sequence required for OTP cell writing and reading.

Selection Notes

Select the PCA2000U/AC/1 when an End Of Life (EOL) battery warning is required; the PCA2001 variant lacks this feature. Consider the OTP programming complexity and the need for external voltage modulation capabilities during manufacturing. Verify that the application can accommodate the bare die package format and associated mounting requirements.

Part Context

The PCA2000U/AC/1 belongs to the PCA2000/PCA2001 family of watch circuits. It is functionally identical to the PCA2001 except for the inclusion of the EOL detection circuitry. Other variants in the series include different packaging options such as WLCSP8 or sawn wafer on Film Frame Carrier.