The LMK00338 is an 8-output PCIe Gen1/Gen2/Gen3/Gen4/Gen5 clock fanout buffer with low additive jitter that can operate up to 400 MHz. It features a 3:1 input multiplexer with an optional crystal oscillator input, two banks of 4 HCSL outputs, one LVCMOS output, and 3 independent output buffer supplies. The input selection and output buffer modes are controlled through pin strapping. The device is offered in a 40-pin WQFN package and leverages much of the high-speed, low-noise circuit design employed in the LMK04800 family of clock conditioners.