Clock synthesis for PCIe and Ethernet
The 5V41066PGGI8 is a PLL-based clock generator from Renesas, built to deliver low-jitter reference clocks for PCI Express and Ethernet interfaces. It accepts a clock or crystal input and produces up to four differential outputs in HCSL or LVDS format, with a maximum output frequency of 200 MHz.
What the 1:4 fanout and differential outputs mean for your design
The 1:4 input-to-output ratio means a single reference clock or crystal feeds four independent clock trees — useful for distributing a clean 100 MHz or 125 MHz reference to multiple PCIe or Ethernet PHY devices without adding separate PLLs per lane. Differential outputs (HCSL or LVDS) provide the common-mode rejection and signal integrity needed for high-speed serial links. HCSL is the standard for PCIe reference clocks; LVDS suits lower-power or longer-trace differential routing on the same part.
The 0.65 mm pitch TSSOP footprint is common in clock distribution designs, and the tape-and-reel packaging supports volume pick-and-place.
Renesas lists the 5V41066PGGI8 as Active and ROHS3 Compliant.