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Interface IC for 10Gb-KX Ethernet

triet tran74
Prodigy 100 points
Other Parts Discussed in Thread: DS125BR820, DS125DF1610, TLK10034

Hello, 
We are designing one server board, in this design, we intend using two XFI interfaces from CPU connecting to the back-plane. Unfortunately, the CPU's XFI does not support electrical specification for Back-plane interface ("K"), also, it only support 8b/10b encoding ("X")
So, my question is  whether TI have any interface IC that can convert the indicated XFI signals to be KX compatible so that we can connect it to back-plane?
Thanks  and regards
Triet Tran
  • 0
    TI__Mastermind 19235 points

    Hi Triet,

    TI has signal conditioning devices that can compensate for the signal impairments in 10G backplane applications. We have both retimer and repeater devices available. In terms of retimer solutions for 10Gbps backplane applications we have the DS125DF1610 in our portfolio. This device is a 16-channel retimer with powerful Rx EQ and DFE capable of compensating for signal impairments in KR-like backplanes. It also implements 3-tap TX FIR. The drawback of this solution is that it does not support link training (LT), a 10GBASE-KR specification requirement. Thus if full 10GBASE-KR standard compliance including LT is sought, then the TI retimer is not a good fit. TI does have repeater solutions in our signal conditioning portfolio that are suitable for full 10GBASE-KR compliant applications, the best option being the DS125BR820 repeater. The TI repeater device provides ample equalization capability, but is also a highly linear device able to pass along the link training information from the host or link partner.

    It seems for your application you are seeking a device to translate 10G 8B/10B to 64B/66B encoding? In my experience XFI interfaces typically implement 64B/66B encoding already. Are you sure your XFI interface is running 8B/10B encoded data? TI's signal conditioning devices such as the retimers would not perform PCS function such as data encoding/decoding. A PHY/SerDes IC would be required for that function. For some applications the host may implement XAUI, 4-lane interface running 3.125Gbps 8B/10B data per lane, and then require translation of XAUI to XFI. For those applications TI has the TLK10034 part number.

    Cordially,

    Rodrigo Natal

    DPS Applications Engineer