The DS1307 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I²C, bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information.
You should use some microcontroller ic for driving 7-segments and reading
buttons.
More info..................................
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Look part Technical Documents
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KAK