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PCF2129AT real time clock with SPI/I2C bus interface breakout board

This is a Real Time Clock module for the PCF2129, a Real Time Clock IC by NXP. The PCF2129 has a selectable I²C-bus or SPI-bus.

It also has a backup battery switch-over circuit that lets you backup the timestamp information.

Features

  • Operating voltage: 1.2V - 4.2V

  • Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors

  • Typical accuracy:

  • PCF2129AT: ±3 ppm from -15 °C to +60 °C

  • Provides year, month, day, weekday, hours, minutes, seconds, and leap year correction

  • Timestamp function:

  • with interrupt capability

  • detection of two different events on one multilevel input pin (for example, for tamper detection)

  • SPI-bus and I²C-bus interface

  • Battery backup input pin and switch-over circuitry

  • Programmable watchdog timer with interrupt

  • Programmable alarm function with interrupt capability

Cautions

  • Please prepare pin headers separately and solder them for your intended use.

Pin allocation

Surface

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Documents

PCF2129AT real time clock with SPI/I2C bus interface breakout board
Name PCF2129AT real time clock with SPI/I2C bus interface breakout board
Code SSCI-023535
SKU# 2353