What this PLL timing generator does
The Renesas 9FG104EGLFT is a PLL-based frequency timing generator designed to produce HCSL outputs for Intel CPU Server, PCI Express (PCIe), and SATA reference clock trees. It takes a single clock or crystal input and fans it out to five HCSL outputs at up to 400 MHz, with the input being single-ended and the outputs differential. The part operates from a 3.135 V to 3.465 V supply and is specified over the commercial temperature range of 0°C to 70°C, making it a fit for controlled-environment server motherboards and storage backplanes.
For dual-sourcing or a pin-compatible second source, the 9DB803DFLFT is a close functional peer — same PLL architecture, HCSL outputs, 400 MHz ceiling, and 0°C to 70°C range — but with a 1:8 fanout instead of 1:5. If your BOM calls for exactly five outputs, the 9FG104EGLFT is the direct fit; the 9DB803DFLFT gives you three spare outputs if you need margin.