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BUY DS12C887A https://www.utsource.net/itm/p/354206.html
Real-Time Clock
Description: Real-Time Clock/Calendar with Alarm and Digital Trimming Features: Real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information Programmable clock/calendar with leap year compensation valid up to 2100 Digital trimming for precise timekeeping Two time-of-day alarms Programmable square-wave output Battery-backed RAM 24-hour or AM/PM format Interrupt output on alarm match 8KB of RAM Low power CMOS technology DIP20 package Applications: Automotive Industrial Home appliances Medical Networking Telecommunications Consumer electronics (For reference only)