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BUY DS12885+ https://www.utsource.net/itm/p/5654776.html
IC RTC CLK/CALENDAR PAR 24-DIP
Description: The DS12885 is a Real-Time Clock (RTC) and calendar with an integrated crystal and battery backup. Features: Real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information Programmable periodic interrupt Programmable square-wave output signal Binary-coded decimal (BCD) or binary format for time and date Leap year compensation valid up to 2100 24-hour or 12-hour format with AM/PM indicator Daylight saving time adjustment Battery-backed RAM maintains time/date in the absence of power Battery switchover circuitry Low power consumption Available in 24-pin DIP package Applications: Personal computers Network servers Industrial controllers Automotive systems Home appliances Security systems (For reference only)