Highly accurate, temperature-compensated serial real-time clock (RTC) with embedded crystal

Features  Embedded high-stability 32 KHz DTCXO  Accuracy: ±3.8 ppm max from 0 to 50°C  Supply voltage: 1.6 to 5.5 V  Current: 0.8 μA typical at 3.0 V  400 kHz I2C interface  Time-of-day alarm (with interrupt)  Fixed-cycle timer interrupt function  Time update interrupt function 