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Low Power 4-Output PCIe 5.0 Clock Generator With On-Chip Termination to support Zout=100 Ohm

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The PI6CG33401 is a 4-output very-low-power PCIe Gen1/Gen2/ Gen3/Gen4/Gen 5 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 16 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 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.


  • 3.3V Supply Voltage
  • Crystal/CMOS Input: 25MHz
  • Four Differential Low Power HCSL Outputs with On-Chip Termination
  • Default ZOUT = 100Ω
  • 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 <50ps
  • 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)
  • Packaging (Pb-free & Green): 32-lead 5mm × 5mm 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 4
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

Recommended Soldering Techniques


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

Request Documents


Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
Contact Sales
Request Samples
Qty. Carrier
PI6CG33401CZHIEX Active W-QFN5050-32 TPGP 2500 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Arrow Electronics 950 12/3/2022 United States Buy Now
Mouser Electronics Inc. 9822 12/3/2022 South America, North America, Asia, Europe, Middle East Buy Now
Request Sample
PI6CG33401ZHIEX Active W-QFN5050-32 GREEN 2500 T&R Contact Sales Request Sample
PI6CG33401ZHIEX-13R Active W-QFN5050-32 TPGP 2500 T&R Contact Sales 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

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2520 2021-05-27 2021-08-27 Qualified Additional Bump Site and Assembly/Test (A/T) Sites