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Renesas Electronics 9DML0451AKILFT — Clock & Timing ICs

9DML0451AKILFT PCIe Clock Buffer, 200 MHz, HCSL, 24-QFN

MPN9DML0451AKILFT
End of Life

Renesas 9DML0451AKILFT, PCI Express (PCIe) clock buffer, PLL No, 2:4 HCSL fanout, 200 MHz max, 3.14V–3.47V supply, -40°C to 85°C, 24-VFQFN Exposed Pad (4x4 mm), Surface Mount, Tape & Reel.

$4.34Ref. price · indicative, final on quote
Renesas Electronics 9DML0451AKILFT datasheet (PDF)
Packaging24-VFQFN Exposed Pad
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

9DML0451AKILFT specifications
ParameterValue
MountingSurface Mount
Voltage3.14V ~ 3.47V
Frequency200MHz
Operating temperature-40°C ~ 85°C
PLLNo
InputHCSL
OutputHCSL
PackageTape & Reel (TR); Cut Tape (CT)
Main purposePCI Express (PCIe)
Case24-VFQFN Exposed Pad
Number of circuits1
Ratio - Input:Output2:4
Differential - Input:OutputYes/Yes

Product details

PCIe reference-clock fanout without the PLL jitter

The Renesas 9DML0451AKILFT is a 2:4 differential HCSL clock buffer designed for PCI Express reference-clock trees. It takes one or two HCSL input pairs and fans out to four HCSL output pairs at up to 200 MHz — enough for PCIe Gen1 and Gen2 root complexes and slot clocks. Because it contains no PLL, there is no loop-filter noise, no lock-time delay, and the output-to-output skew is determined only by the internal buffer matching.

Supply and temperature — design constraints at a glance

The supply range is 3.14 V to 3.47 V.

Frequently asked questions

Is 9DML0451AKILFT RoHS compliant?

Yes, the 9DML0451AKILFT is ROHS3 compliant. No additional exemption documentation is needed for standard RoHS3 jurisdictions.

What are the alternatives to 9DML0451AKILFT?

The closest same-function sibling is the 9DBL411BGLFT, also a PLL-less buffer but with a 1:4 fanout, 150 MHz max, and commercial 0°C to 70°C range. If you need a PLL-based fanout with 400 MHz capability, the 9DB803DFLFT is a 1:8 HCSL buffer. Neither is a drop-in replacement — check the fanout ratio, supply tolerance, and temperature grade against your design.

What is 9DML0451AKILFT's listed PLL status?

The 9DML0451AKILFT has no PLL. It is a straight HCSL buffer — no frequency multiplication or jitter attenuation. This means deterministic propagation delay but no cleanup of noisy input clocks.

What is 9DML0451AKILFT's input and output type?

Both input and output are HCSL (High-Speed Current Steering Logic) differential pairs. The part accepts HCSL-level signals and outputs HCSL-level signals with a 2:4 fanout.