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

SKU: ADA2045

$15.10 AUD, inc GST
$13.73 AUD, exc GST

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Adafruit Si5351A Clock Generator Breakout Board - 8KHz to 160MHz
15.1 AUD

SKU: ADA2045

$15.10 AUD, inc GST
$13.73 AUD, exc GST
5 reviews 0 5 5


  • $6.95 Standard (2-4 days, tracked)
  • $9.95 Express (Overnight*, tracked)
  • $3 Economy Post* (3-7 days, no tracking)
  • FREE Pickup (Newcastle only)

Shipping costs may increase for heavy products or large orders.

Exact shipping can be calculated on the view cart page.

*Conditions apply, see shipping tab below.

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 controlled 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 - connect  either through a breadboard-friendly header add your own SMA connector to the board-edge for RF work.

Adafruit 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. They also put level shifting circuitry on the I2C lines so you can use this chip safely with 3V or 5V logic.

Best of all, Adafruit even have a great tutorial and library to get you started! Adafruit's code is designed for use with the Arduino microcontroller and IDE but is easily ported to your favorite platform with I2C support

Technical Details

This product is listed in:

Documentation and Resources:
  • The Maker Revolution
  • The Maker Revolution celebrates the creation of new devices and the modification of existing ones - the transition from a consumer buying goods to eventually having a major part in their creation. The Maker Revolution places strong emphasis on free (...

Product Comments

Customer Reviews

  1. Review by Murray verified purchaser

    Excellent thank you (Posted on 14/05/2018)

  2. Review by John verified purchaser

    Very quick delivery and product worked fine. (Posted on 19/07/2017)

  3. Review by Roger verified purchaser

    Received my boards in good time as they were waiting on a shipment. Yet to be pressed into service but other amateurs I know have had success with these in their projects. (Posted on 6/06/2017)

  4. Review by Paul verified purchaser

    The tiny Adafruit si5351 clock generator arrived within the advised number of days, and is going into a DDS VFO prototype with Nano controller for an amateur radio receiver. Prefer to buy locally than from .hk or .cn despite a few extra $AUD. (Posted on 3/05/2016)

  5. Review by Luigi - This is a good product. verified purchaser

    This is a good product. (Posted on 26/04/2016)

Exact shipping can be calculated on the view cart page (no login required).

We deliver Australia-wide with these options:

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  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

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