DS1339C-33#

DS1339C-33# is an I²C serial real-time clock. It is a low-power clock/date device with two programmable time-of-day alarms and a programmable square-wave output. Address and data are transferred serially through an I²C 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 DS1339 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply, maintaining time, date, and alarm operation. Typical applications include handhelds (GPS, POS terminals), consumer electronics (set-top box, digital recording, network appliance), office equipment (fax/printers, copier), medical (glucometer, medicine dispenser), telecommunications (routers, switches, servers), other (utility meter, vending machine, thermostat, modem).

• Completely manages all timekeeping functions
• Two time-of-day alarms, programmable square-wave output, oscillator stop flag
• Interfaces to most microcontrollers, I²C serial interface
• Low-power operation extends battery backup run time
• Automatic power-fail detect and switch circuitry, trickle-charge capability
• Underwriters Laboratories® (UL) recognized
• 3.3V voltage rating
• Input leakage is 1µA maximum at VCC=MIN to MAX, TA=-40°C to +85°C
• 16 SO package
• Operating temperature range from -40°C to +85°C

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