9DML04 2:4 3.3V PCIe Clock Mux Renesas Electronics 9DML04 2:4 3.3V PCIe Clock Mux supports PCIe Gen1-4 Common Clocked (CC), Separate Reference no Spread (SRnS), and Separate Reference Independent Spread (SRIS) architectures. The device features a direct connection to 100Ω (xx41) or 85Ω (xx51) transmission lines and saves 16 resistors compared to standard PCIe devices. The 9DML04 can be factory programmed with a user-defined power-up default SMBus configuration.