Adafruit Si5351A Clock Generator Breakout Board – 8KHz to 160MHz



  • Adafruit
Availability: Retired

Out Of Stock

SKU: BOB-096 Manufacturer: Adafruit Industries Mfg Part Number: 2045


Never hunt around for another crystal again, with the Si5351A clock generator breakout from Adafruit! This chip has a precision 25MHz crystal reference and internal PLL and dividers so it can generate just about any frequency, from <8KHz up to 150+ MHz

The Si5351A clock generator is an I2C controller clock generator. It uses the onboard precision clock to drive multiple PLL’s and clock dividers using I2C instructions. By setting up the PLL and dividers you can create precise and arbitrary frequencies. There are three independent outputs, and each one can have a different frequency. Outputs are 3Vpp, either through a breadboard-friendly header or, for RF work, an optional SMA connector.

Adafruit has put this handy little chip onto it’s own breakout board PCB, with a 3.3V LDO regulator so it can be powered from 3-5VDC. There is also level shifting circuitry on the I2C lines so you can use this chip safely with 3V or 5V logic.



  • Dimensions: 31 x 22 x 2mm / 1.22 x .87 x .08″
  • Frequency Range: <8KHz up to 150+ MHz
  • Weight: 2.5 grams
  • 3V or 5V logic compatible
  • Voltage Output: 3Vpp




  Difficulty Level

Soldering Skill: Beginner
Prototyping Skill: Beginner
Programming Skill: Beginner

  Product Certifications

  Product Attributes

Weight: 4 g

  Warranty Policy

This product has a 30 Day Warranty from the date of delivery. The item must not be modified, abused, incorrectly hooked up, or used for purposes outside the original scope of design.

  Return Policy

This product is Final Sale and cannot be returned once purchased. 

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