Diodes Incorporated
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Very Low Power 6-Output PCIe Gen 4 Clock Buffer with on chip termination

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The PI6CB18601 is an 6-output very low power PCIe Gen1/Gen2/ Gen3/Gen4 clock buffer. It takes an reference input to fanout eight 100MHz low power differential HCSL outputs with on-chip terminations. The on-chip termination can save 24 external resistors and make layout easier. Individual OE pin for each output provides easier power management.

It uses Diodes proprietary PLL design to achieve very low jitter that meets PCIe Gen1/Gen2/Gen3/Gen4 requirements. Other than PCIe 100MHz support, this device also support Ethernet application with 50MHz or 125MHz via SMBus. It provides various options such as different slew rate and amplitude through strapping pins or SMBUS so that users can configure the device easily to get the optimized performance for their individual boards.


  • 1.8V supply voltage
  • HCSL input: 100MHz, also support 50MHz or 125MHz via SMBus
  • 6 differential low power HCSL outputs with on-chip termination
  • Individual output enable
  • Programmable Slew rate and output amplitude for each output
  • Differential outputs blocked until PLL is locked
  • Strapping pins or SMBus for configuration;
  • 3.3V tolerant SMBus interface support
  • Very low jitter outputs
    - Differential cycle-to-cycle jitter <50ps
    - Differential output-to-output skew <50ps
    - PCIe Gen1/Gen2/Gen3/Gen4 compliant
  •  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. https://www.diodes.com/quality/product-definitions/
  •  Packaging (Pb-free & Green): 40-lead 5×5mm TQFN

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
Function PCIe clock buffer
Input Type(s) HCSL
Jitter RMS (ps) 0.1
Number of Outputs 6
Output Frequency (MHz) 100
Output Type(s) LP-HCSL
Skew (PS) 50
Supply Voltage (V) 1.8
Ambient or Junction Temperature (°C) -40 to 85

Technical Documents

Application Information

Design tool model software

Evaluation Boards and User Guides

Recommended Soldering Techniques