PCF2129A Datasheet | NXP Semiconductors

Integrated RTC, TCXO and quartz crystal Rev. 01 - 13 January 2010 .. Product data sheet 1. General description The PCF2129A is a CMOS1 real time clock and calendar with an integrated Temperature pensated 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 pensated Crystal Oscillator (TCXO) with integrated capacitors Accuracy: ±3 ppm from - 15 °C to +60 °C Integration of a 32.768...