Integrated Device Technology Real-Time Clock With Battery Backed Non-Volatile RAM 1338AC-18SRGI8

The 1338 is a serial real-time clock ( RTC ) device that consumes ultra-low power and provides a full binary-coded decimal ( BCD ) clock/calendar with 56 bytes of battery backed Non-Volatile Static RAM . The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The clock operates in either the 24-hour or 12-hour format with AM / PM indicator. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. Access to the clock/calendar registers is provided by an I2C interface capable of operating in fast I2C mode. Built-in Power-sense circuitry detects power failures and automatically switches to the backup supply, maintaining time and date operation.