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PCF2129 Datasheet Accurate RTC

Manufacturer: NXP Semiconductors

General Description

The PCF2129 is a CMOS1 Real Time Clock (RTC) and calendar with an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz crystal optimized for very high accuracy and very low power consumption.

The PCF2129 has a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, a timestamp function, and many other

Overview

PCF2129 Accurate RTC with integrated quartz crystal for industrial applications Rev.

8.

Key Features

  • UL Recognized Component (PCF2129AT and PCF2129T).
  • Operating temperature range from -40 °C to +85 °C.
  • Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors.
  • Typical accuracy:.
  • PCF2129AT: ±3 ppm from -15 °C to +60 °C.
  • PCF2129T: ±3 ppm from -30 °C to +80 °C.
  • Integration of a 32.768 kHz quartz crystal and oscillator in the same package.
  • Provides year, month, day, weekday, hours, minutes, seconds, and leap.