Diodes Incorporated
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20-Output PCIe 4.0/5.0/6.0 Clock Buffer With On-chip Termination

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The PI6CB332001A is a 20-output, very low-power, PCIe® 1.0/2.0/3.0/4.0/5.0/6.0 clock buffer. The device is capable of distributing the reference clocks for UPI, SAS, SATA, and other applications. It takes a reference input to fanout twenty 100MHz low-power differential HCSL outputs with on-chip terminations. The on-chip termination can save 80 external resistors and make layout easier. OE pins combined with SMBus bits, as well as a 3-wire side band interface, provide easier power management for each output. All OE pins are power down tolerant, which allows the OE pins to be driven by external signals when the device is in a power down or reset condition. The device must reset and power up properly if these pins are driven to any valid voltage prior to the assertion of VDD or PWRGD#.

The device uses Diodes' proprietary design to achieve very low jitter that meets PCIe 1.0/2.0/3.0/4.0/5.0/6.0 requirements.


  • Supports Intel's DB2000QL spec
  • 3V Supply Voltage
  • HCSL input: 100MHz (typ), up to 400MHz
  • 20 Differential Low-power HCSL Outputs with On-chip Termination
  • Two Output Enable Control Modes
    • Traditional 8 OE# Pins with Power Down Tolerance and 20 SMBus bits
    • Simple 3-wire Side-Band Interface Real-time Control
  • SMBus Interface Support
  • Spread Spectrum Tolerant
  • Very Low Jitter Outputs
    • Differential Additive Phase Jitter: DB2000Q <30fs RMS
    • Differential Additive Phase Jitter: PCIe 4.0 <30fs RMS
    • Differential Additive Phase Jitter: PCIe 5.0 <30fs RMS
    • Differential Additive Phase Jitter: PCIe 6.0 <16fs RMS
    • PCIe 1.0/2.0/3.0/4.0/5.0/6.0 compliant
  • Differential Output-to-output Skew <50ps
  • Low Propagation Delay: <3ns
  • Industrial Temperature Support: -40°C to 85°C
  • 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):
    • 80-lead 6x6mm dual-row aQFN

Product Specifications

Product Parameters

Compliance (Only Automotive(Q) supports PPAP) Standard
Function Buffer
Number of Outputs 20
Output Type(s) HCSL
Maximum Output Frequency (MHz) 100
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

Recommended Soldering Techniques