DSP, Micros & Memory


2-wire RTC with two time-of-day alarms

14 August 2002 DSP, Micros & Memory

Dallas Semiconductor's DS1339 serial realtime clock, a low-power clock/calendar with two programmable time-of-day alarms and a programmable square-wave output, also has dual power pins for primary and backup power supplies, and includes a programmable trickle charger. Address and data are transferred serially by a 2-wire serial bus. 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 oscillator runs down to 1,3 V. The DS1339 operates over -40 to +85°C and is available in 8-pin microSOP package.



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