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Low Power 8-Output PCIe 5.0 Clock Generator With On-Chip Termination

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The PI6CG33802C is an 8-output, very-low-power PCIe Gen1/ Gen2/Gen3/Gen4/Gen5 clock generator. It uses a 25MHz crystal
or CMOS reference as an input to generate the 100MHz low-power differential HCSL outputs with on-chip terminations. The on-chip termination can save 32 external resistors and make layout easier. An additional buffered reference output is provided to serve as a low-noise reference for other circuitry.

It uses Diodes' proprietary PLL design to achieve very-low jitter that meets PCIe Gen1/Gen2/Gen3/Gen4/Gen5 requirements.
It also provides various options, such as different slew rate and amplitude through SMBUS, so users can easily configure
the device to get the optimized performance for their individual boards. The device also supports selectable spreadspectrum
options to reduce EMI for various applications.


  • 3.3V Supply Voltage
  • Crystal/CMOS Input: 25 MHz
  • Eight Differential Low-Power HCSL Outputs with On-Chip Termination
  • Default ZOUT = 85Ω
  • Individual Output Enable
  • Reference CMOS Output
  • Programmable Slew Rate and Output Amplitude for Each Output
  • Differential Outputs Blocked Until PLL is Locked
  • Selectable 0%, -0.25%, or -0.5% Spread on Differential Outputs
  • Strapping Pins or SMBus for Configuration
  • Differential Output-To-Output Skew <60ps
  • Very-Low Jitter Outputs
    - Differential Cycle-To-Cycle Jitter <50ps
    - PCIe Gen1/Gen2/Gen3/Gen4/Gen5 Compliant
    - CMOS REFOUT Phase Jitter
       • < 0.3ps RMS, SSC off
       • <1.5ps RMS, SSC on
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable,
    and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative.
  • Packaging (Pb-free & Green): 48-lead 6mm × 6mm TQFN

Product Specifications

Product Parameters

Function Generator
Compliance(Only Automotive supports PPAP) Standard
Input Type(s) Crystal, CMOS
Jitter RMS (ps) <0.15
Number of Outputs 8
Output Frequency (MHz) 100
Output Type(s) Low Power HCSL
Skew (PS) 50
Supply Voltage (V) 3.3
Ambient or Junction Temperature (°C) -40 to 85

Technical Documents

SPICE/IBIS Model Documents

Application information

Recommended Soldering Techniques


Additional Technical Documents are available upon request: 
Application information, Evaluation board, and Other technical documents

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