Diodes Incorporated

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Very Low Power 8-Output PCIe Clock Buffer With On-Chip Termination

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The PI6CB33802 is an eight-output very-low-power PCIe PCIe Gen1/Gen2/Gen3/Gen4/Gen5 clock buffer. It takes a reference
input to fanout eight 100MHz low-power differential HCSL outputs with on-chip terminations. The on-chip termination can save 32 external resistors and make layout easier. 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 Gen1/Gen2/Gen3/Gen4/Gen5 requirements.
Other than PCIe 100MHz support, this device also supports Ethernet application with 50MHz, 125MHz, and 133.33MHz via
SMBus. It 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.


  • 3.3V Supply Voltage
  • HCSL Input: 100MHz, also supports 50MHz, 125MHz, or 133.33MHz via SMBus
  • Eight Differential Low-Power HCSL Outputs with On-Chip Termination
  • Default ZOUT = 85Ω
  • Spread Spectrum Tolerant
  • 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
  • Differential output-to-output skew <50ps
  • Very low jitter outputs
    • Differential cycle-to-cycle jitter <50ps
    • PCIe Gen1/Gen2/Gen3/Gen4/Gen5 CC compliant
    • PCIe Gen 2 and 3 SRiS and SRnS compliant
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • Packaging (Pb-free & Green): 48-lead 6mm × 6mm TQFN

Product Specifications

Product Parameters

Compliance (Only Automotive(Q) supports PPAP) Standard
Function Buffer
Number of Outputs 8
Output Type(s) HCSL
Maximum Output Frequency (MHz) 100, 125, 133.33, 156.25
Additive Jitter (ps) 0.05
Supply Voltage (V) 3.3
Input Type(s) HCSL
Skew (PS) 50
Ambient or Junction Temperature (°C) -40 to 85

Technical Documents

Application Information

SPICE/IBIS Model Documents

Recommended Soldering Techniques