10G/40G/100G Retimer And Gearbox

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The BCM82793 is a physical layer device that supports 10G, 40G and 100G Ethernet.

In 100G mode, the device gearboxes four lanes of 25Gb/s data into a standard 10 by 10Gb/s CAUI bus. In retimer mode, the device retimes 10 lanes of 10Gb/s data supporting two 40G Ethernet ports, ten 10G Ethernet ports or a mix thereof. The BCM82793 is offered in an industry standard 19 x19 mm footprint, enabling upgrades to existing systems. The 25Gb/s, line side, interface is fully compliant with the 100G Ethernet IEEE802.3ba and IEEE802.3bj standards including support for IEEE CL73 (Autoneg), CL91 (FEC) and CL92 (Transmit Training).


  • 100G gearbox with optional retiming modes for 2x40GbE or 10x10GbE
  • Standard system side CAUI bus
  • Industry standard 19 x19 mm package
  • IEEE CL73 Auto Negotiation
  • CL85, CL92, CL93 Transmit Training
  • CL91 FEC
  • Fully adaptive 25G and 10G receivers with 30dB of EQ
  • Low power 28nm CMOS


  • HDTV
  • IPTV
  • Set-Top Boxes

Lifecycle Status


Specification Value
Lifecycle Active
Distrib. Inventory No
SerDes / GPHY
I/O Bandwidth (Gbps)
Bandwidth UOM
Package 28nm, FPB4NGS, 27mmx27mm
PHY Type Gearbox
I/O Controller
Bus Interface
Transfer Rates
External Memory Interfaces 8-bit and 16-bit Flash, w/ 6 Chip Selects SRAM, NVSRAM
ASIC 57301
Link-Speeds 10Gb
Ports 1
TruFlow™ Yes
TruManage™ Yes
Smart Congestion Control No
RoCEv2 No
Multi-Host No
Smart NICs No


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