Diodes Incorporated
Back to PCI Express (PCIe) Clock Buffers


12-Output PCIe 5.0/6.0 Clock Buffer with 33ohm Output Impedance

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The DIODES PI6CBE33123 is a low-power PCIe® 1.0/2.0/3.0/4.0/ 5.0/6.0 clock buffer. It takes a reference input to fanout twelve 100MHz low-power differential HCSL outputs with on-chip terminations for 33Ω output impedance. It supports both zero-delay and fanout buffer functions for various applications. An individual OE pin for each output provides easier power management. It uses Diodes proprietary PLL design to achieve very-low jitter that meets PCIe 1.0/2.0/3.0/4.0/5.0/6.0 requirements. Other than PCIe 100MHz support, this device also supports 133.33MHz via a pin.


  • Twelve Differential Low-Power HCSL Outputs with On-Chip
  • Termination
  • Default ZOUT = 33Ω
  • Spread Spectrum Tolerant
  • Individual Output Enable
  • Selectable PLL Bandwidths
  • Hardware/SMBus Control of ZDB and Fanout Buffer Modes
  • Up to 9 Selectable SMBus Addresses
  • 1 to 400MHz Fanout Buffer Operation
  • 100MHz and 133.33MHz ZDB Mode
  • Differential Output-to-output Skew <50ps
  • Very Low Jitter Outputs
    • Differential Cycle-to-Cycle Jitter <50ps
    • Fanout Buffer Mode Additive Phase Jitter
      • PCIe 6.0 CC: 0.012ps
      • DB2000Q Additive Jitter: 0.02ps
    • ZDB Mode Phase Jitter
      • PCIe 6.0 CC: RMS 0.01ps
      • QPI/UPI 11.4GB/s: 0.14ps RMS
      • IF-UPI: RMS 0.15 ps
    • 3V Core Supply Voltage
    • 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-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/
    • Packaging (Pb-free & Green):
      • 64-lead, 9mm × 9mm TQFN (ZD)

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
Function PCIe clock buffer
Input Type(s) HCSL
Jitter RMS (ps) FOB mode typ 17fs
Number of Outputs 12
Output Frequency (MHz) FOB mode 400MHz
Output Type(s) HCSL
Skew (PS) 50
Supply Voltage (V) 3.3
Ambient or Junction Temperature (°C) -40 to 85

Related Content



Technical Documents

Recommended Soldering Techniques