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PCF2128 Datasheet Integrated RTC/TCXO/Crystal

Manufacturer: NXP Semiconductors

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General Description

The PCF2128 is a ready to run CMOS real time clock/calendar with an integrated temperature compensated crystal oscillator (TCXO).

In timekeeping applications the high accuracy of the PCF2128 allows it to be used as a replacement for costly and higher powered long wave receivers or GPS receivers.

A programmable battery switch-over circuit enables an uninterruptible power supply and consequently continuous timekeeping.

Overview

PCF2128 Integrated RTC / TCXO / Crystal Rev.

00.03 — 4 June 2007 www.DataSheet4U.com Preliminary [short] data sheet 1.

Key Features

  • 512 bytes of general purpose RAM, a programmable watchdog, a time stamp facility and a voltage monitoring facility. Programming is possible using either an SPI or an I2C-bus interface. 2. Features.
  • Integration of a 32.768 kHz quartz crystal in the same package as the RTC.
  • temperature compensated crystal oscillator (TCXO) with integrated capacitors.
  • accuracy: typically 3 ppm from.
  • 20 °C to +70 °C, typically 5 ppm from.
  • 40 °C to +85 °C.
  • provides.

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