SI5338 Clock Generators Skyworks Solutions Inc. SI5338 Clock Generators offer high performance and low jitter and are capable of synthesizing any frequency on each of the device's four output drivers. These timing ICs are capable of replacing up to four different frequency crystal oscillators or operating as a frequency translator. Using a patented MultiSynth™ technology, the Si5338 Clock Generators allow the generation of four independent clocks with 0ppm precision. Each output clock is independently configurable to support various signal formats and supply voltages. These devices are programmable via an I2C/SMBus-compatible serial interface and support operation from a 1.8, 2.5, or 3.3V core supply.