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19-Output PCIe 4.0/5.0 Clock Generator With On-chip Termination

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The PI6CG330440 is a 19-output very low jitter clock generator. It takes an reference input to generate 25MHz and 100MHz outputs. The on-chip termination can save 80 external resistors and make layout easier. Individual OE pin for each output provides easier power management. It uses Diodes' proprietary design to achieve very low jitter that meets PCIe 1.0/2.0/3.0/4.0/5.0 clock requirements. 


  • Supports Intel's CK440Q spec
  • 3.3V supply voltage
  • 25MHz crystal or an input from a XO / TCXO / OCXO for
    meeting customer specific PPM requirements
  • 19 differential clock output pairs @ 1.4V differential into PCI
    Express* (PCIe*) compliant test load
  • 7 dedicated 100MHz outputs
  • 3 dedicated 25MHz outputs
  • 9 selectable outputs capable of driving 25M or 100MHz
  • 85Ω Differential drivers
  • Programmable SSC on the 100 MHz
  • SMBus Programmable Configurations with multiple SMBus
  • Two Tri-level Addresses Selection (9 SMBus Addresses)
  • PCIe compatible OE# control on 7 pins, and 3 wire shift / load
    control on all outputs
  • Very low jitter outputs: 0.08 ps effective phase jitter after PCIe
    5.0 transfer function
  • Dedicated pins for Platform Time Input & Output (PFT_IN &
    PFT_OUT) clocking
  • Totally Lead-Free & Fully RoHS Compliant 
  • Halogen and Antimony Free. “Green” Device
  • 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):
    • 100-Contact, 8 x 8 mm UQFN (ZUD)

Product Specifications

Product Parameters

Function Generator
Compliance(Only Automotive supports PPAP) Standard
Input Type(s) Crystal, CMOS
Jitter RMS (ps) 0.05
Number of Outputs 19
Output Frequency (MHz) 25, 100
Output Type(s) Low Power HCSL
Skew (PS) 25
Supply Voltage (V) 3.3
Ambient or Junction Temperature (°C) -40 to 85

Related Content


Technical Documents

Recommended Soldering Techniques


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

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Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
Contact Sales
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Qty. Carrier
PI6CG330440ZUDIEX Active U-QFN8080-100 TPGP 3000 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Digi-Key Electronics 3000 8/11/2022 Europe, Asia, North America Buy Now
Request Sample

Environmental Compliance Legend:
LFF: Pb-Free Finish and RoHS 5/6
TLFP: Totally Pb-Free Product and RoHS 6/6
LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free
TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free
GREEN: Halogen-free and RoHS compliant
RoHS: RoHS compliant but NOT halogen-free