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Renesas Electronics 9FGV0641AKLF — Clock & Timing ICs

9FGV0641AKLF PCIe Clock Generator, 100MHz, 40-VFQFPN

MPN9FGV0641AKLF
End of Life

Renesas 9FGV0641AKLF PCI Express (PCIe) clock generator, integrated PLL, 100 MHz max output, 1:7 input-to-output ratio, HCSL/LVCMOS outputs, 1.7V~1.9V supply, 40-VFQFPN (5x5) surface mount, 0°C~70°C operating temperature, ROHS3 compliant.

$3.8Ref. price · indicative, final on quote
Renesas Electronics 9FGV0641AKLF datasheet (PDF)
Packaging40-VFQFN Exposed Pad
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

9FGV0641AKLF specifications
ParameterValue
MountingSurface Mount
Voltage1.7V ~ 1.9V
Frequency100MHz
Operating temperature0°C ~ 70°C
PLLYes
InputLVDS, Crystal
OutputHCSL, LVCMOS
PackageTray
Main purposePCI Express (PCIe)
Case40-VFQFN Exposed Pad
Number of circuits1
Ratio - Input:Output1:7
Differential - Input:OutputNo/Yes

Product details

PCIe clock generator with integrated PLL

The Renesas 9FGV0641AKLF is a single-circuit PCI Express (PCIe) clock generator built around an integrated PLL. It accepts either an LVDS or crystal input and produces up to seven HCSL or LVCMOS outputs at frequencies up to 100 MHz. The 1:7 fanout ratio lets one reference clock feed multiple PCIe slots, root complexes, or endpoint devices without adding external fanout buffers. The part operates from a 1.7V to 1.9V supply and is housed in a 40-lead VFQFPN with exposed pad for thermal relief.

Outputs and frequency — what 100 MHz and HCSL mean for the bus

The 100 MHz maximum output frequency is the standard PCIe reference clock rate for Gen1 and Gen2 lanes. HCSL is the differential signalling format specified by the PCIe base spec for the reference clock.

That covers office equipment, datacom switches, servers in conditioned racks, and test equipment.

Frequently asked questions

What is the output frequency range of 9FGV0641AKLF?

The maximum output frequency is 100 MHz. The datasheet specifies this as the upper limit; the actual output frequency depends on the PLL configuration and reference input.

Is 9FGV0641AKLF RoHS compliant?

Yes, it is ROHS3 compliant — no restricted substances above the exemption thresholds.

Is there a replacement or equivalent for 9FGV0641AKLF?

The 9DB803DFLFT is a functional peer with the same PCIe clock generator role and HCSL outputs, but it runs on a 3.135V supply and offers a 1:8 fanout ratio. The 9ZXL0851EKKLF and 9ZXL1231EKILF extend the frequency to 400 MHz and the temperature range to -40°C to 85°C, but they also use a 3.135V supply. None are drop-in replacements — the supply voltage difference requires a board change.