Specifications
Series
BCM8566x
Function
PCIe Gen6 / CXL 3.1 retimer
Lanes
8
Process
5 nm
Data Rate
64 GT/s PAM4 (Gen6), backward to Gen1 2.5 GT/s
Channel Reach
>36 dB loss compensation
Bifurcation
1x8, 2x4, 4x2
Host Interface
Standard PCIe 100 MHz reference clock
Footprint
Intel PCIe 6.0 Retimer Supplemental Footprint pin-compatible
Equalization
Adaptive TX-FIR link training, RX DFE + CDR
Form Factor
Flip-chip BGA
Use
AI server riser, backplane, SSD attach
Board-level SKU reference
| Item | Value |
|---|---|
| MPN | BCM85668 |
| Market segment | Data center / AI server |
| Qualification | Published Broadcom product brief 02/2024 |
Use Case
The BCM85668 is used on PCIe Gen6 riser cards, GPU tray backplanes and dual-host CXL topologies where trace length or connector loss would otherwise prevent 64 GT/s link training. Typical deployments pair it with Broadcom PEX90xxx Gen6 switches and PCIe 6.0 x16 GPU or SSD endpoints.
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