DS1341: RTC Minimizes Current Consumption and Allows Use of High-ESR Crystals

Address and data for this device is accessed through an I2C serial interface. Other features include two time-of-day alarms, two interrupt outputs, a programmable square-wave output, and a serial bus timeout mechanism. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either 24hr or 12hr format with an AM/PM indicator. The DS1341 also includes an input for synchronization, thus allowing the timekeeping accuracy to be based on an external clock source.