Specific care should be given to choose a clock generator which meets the clock receiver’s jitter spec. A requirement jitter spec can have many forms. In its easiest form, a chipset vendor specifies a standard to comply to; in this example, PCI-Express Gen 2. In this case, it is advisable to select a clock device created for this specific purpose. In the particular case of PCI-Express, Renesas offers a wide range of dedicated clock devices such as generators, buffers, and multiplexers.

