Analog Devices Inc. MAX31343 Real-Time Clock (RTC)

The RTC maintains seconds, minutes, hours, day, date, month, year, and century information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year up to the year 2199. The clock operates in the 24-hour format. Other features include two programmable time-of-day alarms, interrupt output, uncompensated programmable clock output, and temperature-compensated programmable square-wave output. Addresses and data are transferred serially through an I²C bidirectional bus. A voltage reference and comparator circuit monitors the status of V_CC to detect power failures and automatically switch to the backup supply when necessary.