Diodes Incorporated
V QFN6060 48 SWP ZLW48 MSL1

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PCIe 6.0 Clock Generator, 8-Output, AECQ-Grade 2

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The PI6CG338Q is an 8-output very low power PCIe® Gen 1/Gen 2/Gen 3/Gen 4/Gen 5/Gen 6 clock generator. It uses 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 Gen 1/Gen 2/Gen3 /Gen 4/Gen 5/Gen 6 requirements. It also provides various options such as different slew rate and amplitude through SMBUS so that users can configure the device easily to get the optimized performance for their individual boards. The device also supports selectable spread-spectrum options to reduce EMI for various applications.


  • 3V Supply Voltage
  • Crystal/CMOS Input: 25 MHz
  • 8 Differential Low Power HCSL Outputs with On-chip Termination
  • 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
    • PCIe 6.0 Common Clock (RMS) Jitter <0.04ps
    • Differential Cycle-To-Cycle Jitter <50ps
  • PCIe Gen 1/Gen 2/Gen 3/Gen 4/Gen 5/Gen 6 Compliant
  • Supports Automotive Grade 2
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • The PI6CG338Q is suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. https://www.diodes.com/quality/product-definitions/
  • Packaging (Pb-free & Green):
    • 48-contact, 6×6mm (ZLW)

Product Specifications

Product Parameters

Function Generator
Compliance(Only Automotive supports PPAP) Automotive
Input Type(s) Crystal,CMOS
Jitter RMS (ps) 0.04
Number of Outputs 8
Output Frequency (MHz) 100
Output Type(s) Low Power HCSL
Skew (PS) 60
Supply Voltage (V) 3.3
Ambient or Junction Temperature (°C) -40 to 105

Technical Documents

Recommended Soldering Techniques


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

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