3 x DS1307 Real Time Clock Chip RTC DIP-8

(1 customer review)

CAD 3.95

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SKU: 26276 Category:


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. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator.

The DS1307 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply. Timekeeping operation continues while the part operates from the backup supply.

The chips we offer showDS1307Z on the top, obviously a misprint, since this is the correct marking for the SOP-8 package, but not the DIP package. We believe that this is the reason for the low price. The samples we tested worked as expected.

The Library is already available through the library manager within the Arduino IDE.

Additional information







1 review for 3 x DS1307 Real Time Clock Chip RTC DIP-8

  1. m.p (verified owner)

    These are great but can be very inaccurate (and frustrating) if you’re just plugging them into a breadboard. I have had the best results after soldering the crystal as close to the DS1307 XTAL pins as possible and trim the DS1307 XTAL pins back as short as possible. Oh, and use the crystals that were included – not some extra crystal you cut out of a clock or had kicking around in a bin somewhere…

    Works great being backed up with a CR2016, and the two I’m using from the order are still less than a second out from when they were set a couple of days ago!


    The DS1307 is designed for a crystal that requires 12.5pF load capacitances. The crystal we ship within the kit is a 12.5pF type. But already the big rails inside a breadboard will add a lot more to it, trimming the crystal to a lower frequency which leads to a slower running clock. The most common issue with these chips, causing the most complaints. But you did it right, moving the crystal as close to the chip as possible, and use the shortest possible connection.

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