DS1339U-33+ I2C Serial Real Time Clock electronic Integrated Circuit Chip board / computer chip board

DS1339U-33+ I2C Serial Real Time Clock electronic Integrated Circuit Chip board / computer chip board

FEATURES

►Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with LeapYear Compensation Valid Up to 2100

►Available in a Surface-Mount Package with an Integrated Crystal (DS1339C)

►I 2 C Serial Interface

►Two Time-of-Day Alarms

►Programmable Square-Wave Output

►Oscillator Stop Flag

► Automatic Power-Fail Detect and Switch Circuitry ►Trickle-Charge Capability

►Underwriters Laboratory (UL) Recognized Pin Con

GENERAL DESCRIPTION

The DS1339 serial real-time clock (RTC) is a lowpower clock/date device with two programmable timeof-day alarms and a programmable square-wave output. Address and data are transferred serially through an I2 C* bus. The clock/date 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 the 24-hour or 12-hour format with AM/PM indicator. The DS1339 has a built-in powersense circuit that detects power failures and automatically switches to the backup supply, maintaining time and date operation.

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