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DeadOn RTC - DS3234 Breakout
DeadOn RTC - DS3234 BreakoutDeadOn RTC - DS3234 BreakoutDeadOn RTC - DS3234 Breakout

DeadOn RTC - DS3234 Breakout

  (2 Reviews)
Our Price:  £21.30 

Available Now:  

5 in stock, immediate despatch

SKU:  PPBOB-10160
Part Number:  BOB-10160
Brand:  SparkFun

Here is a real time clock based on the DS3234 Real Time Clock IC. The DS3234 is a low-cost, extremely accurate SPI bus real-time clock with an integrated temperature-compensated crystal oscillator and crystal.

The RTC maintains seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections of leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided.

The underside of the board holds a 12mm coin-cell battery holder for battery backup.

Note: These do not include a battery. See here for a battery.


  • +-2ppm accuracy
  • Two alarms
  • SPI output
  • Low power consumption
  • Accurate calendar up to year 2100
  • Battery backup included


We now source these from multiple suppliers - The unit(s) you receive may not be branded by Sparkfun.

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Customer Reviews
Average Rating (2 Reviews):  
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Easy to solder, easy to program
Monday, 21 April 2014  |  Ken

The RTC is accurate (30 seconds per year) and easy to solder up for a breadboard. The programming is pretty straightforward and it has a lot more than just an RTC - it has a programmable alarm with an interrupt pin (so the CPU can be brought out of low-po


2 of 2 people found this review helpful.

Brilliant accuracy
Tuesday, 26 June 2012  |  Matt

Very pleased with this, so much accuracy for very little effort


2 of 2 people found this review helpful.