3 x DS1307N Real Time Clock Chip RTC DIP-8

CAD 5.69 CAD 4.55

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Availability: Only 3 left in stock SKU: 26276


The DS1307N 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 DS1307N 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.

We carry the DS1307N Real Time Clock chip from HGSEMI, a 100% compatible chip for a fraction of the price of a Maxim DS1307 chip.

Supply voltage: 4.5-5.5V

Backup battery voltage: 2-3.5V

Supply current (active): <1.5mA

I2C clock speed: 0-100kHz

Download datasheet HGSEMI DS1307N  

Note: Multiple libraries are available through the library manager within the Arduino IDE. We highly recommend the one from Paul Stoffregen.

1 review for 3 x DS1307N Real Time Clock Chip RTC DIP-8

  1. 5 out of 5

    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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