The following content is an automatically extracted verbatim text
from the original manufacturer datasheet and is provided for reference purposes only.
View original datasheet text
PCF2129A
Integrated RTC, TCXO and quartz crystal
Rev. 01 — 13 January 2010
www.DataSheet4U.com
Product data sheet
1. General description
The PCF2129A is a CMOS1 real time clock 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 PCF2129A has a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, a timestamp function, and many other features.
2. Features
Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors Accuracy: ±3 ppm from −15 °C to +60 °C Integration of a 32.