IDT1338

DATASHEET REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM IDT1338 General Description The IDT1338 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. Applications Telecom (Routers, Switches, Servers) Handheld (GPS, Point of Sale POS terminals) Consumer Electronics (Set-Top Box, Digital Recording, Network Applications, Digital photo frames) Office (Fax/Printers, Copiers) Medical (Glucometer, Medicine Dispensers) Others (Thermostats, Vending Machines, Modems, Utility Meters) Block Diagram Features Real-Time Clock (RTC) counts seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to 2100 56-Byte battery-backed Non Volatile RAM for data storage Fast mode I2C Serial interface Automatic power-fail detect and switch circuitry Programmable square-...