Server clock-tree PLL — what this part does
The Renesas 9FG104EGILF is a single-PLL clock generator that takes a clock or crystal input and delivers five HCSL outputs at up to 400 MHz. It is designed for the Intel CPU server clock tree, PCI Express reference clocks, and SATA interfaces — the kind of timing distribution you find on a motherboard or add-in card where the platform calls for a dedicated HCSL fanout buffer with integrated PLL cleaning. The input side accepts either a single-ended clock or a fundamental-mode crystal, so you can feed it from an onboard oscillator or a discrete crystal without an extra buffer stage. The outputs are differential HCSL — the standard for PCIe reference clocks — and the part generates them from a non-differential input, which saves a differential oscillator on the BOM.
400 MHz and HCSL — what the output spec means for PCIe generation
Maximum output frequency is 400 MHz. Output type is HCSL. Input-to-output ratio is 1:5.
Package and footprint — 28-TSSOP
Package is 28-TSSOP with 4.40 mm width.