The 9ZXL1951D is designed to create clocks for PCI Express Generation 4. This video demonstrates how the reference clock for the 9ZXL1951D does not need to be PCI Express Gen4 compliant. When using the Low Bandwidth mode, the 9ZXL1951D will attenuate jitter so its output clocks still pass PCI Express Gen4, even when the input clock only passes PCI Express Gen3. This is most useful when the clock has spread spectrum modulation because it is very difficult to make a very low noise spreading clock.

To learn more about the 9ZXL1951D and IDT's PCIe Gen 4 clock solutions, visit or