The SparkFun Qwiic Clock Generator breakout offers a wide range of customizable frequencies in a wide range of different signal types using a single reference clock. Four (single output) clock outputs can generate frequencies from 1MHz-200MHz and eight (differential output) clock outputs can generate frequencies from 1MHz-350MHz. The frequency's many properties can be manipulated in code via I2C using the SparkFun Arduino Library.
There are two Qwiic connectors populated on the board to easily configure the clock generator without the need of soldering to the I2C lines. However, soldering is required to connect to the clock outputs. Additionally, there are four banks of programmable memory available for when it's ready to sit on its own within the project without a microcontroller.
Note: An oscilloscope is highly recommended to verify that the programmed clock signal is correct as its the only way to verify the output accurately.