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TLK10034: questions about TLK10034

TS Yang
Genius 4800 points
Part Number: TLK10034

Hello,

I'm reviewing TI's TLK10034 4-ch 10G transceiver for our network application.

And have two questions as below.

1. If 10Gbps (SFI or 10GBase-KR) is delivered to a 5Gbps optic transceiver, packet buffering will be required.

I wonder if there is memory inside for this.

2. 10Gbps is connected to 5Gbps optic transceiver, but we plan to expand 10Gbps to 10Gbps optic transceiver in the future.

I wonder whether TLK10034 supports Bypass (or Pass through) function for this purpose.

thanks,

TS

  • 0
    TI__Genius 16150 points
    Hi TS Yang,

    1. The TLK10034 does not have a memory inside for this kind of application.
    2. This device does not have a bypass feature for this purpose, the only bypass feature built in is 8b/10b encoder/decoder.

    Best Regards,
    Luis Omar Moran
    High Speed Interface
    SWAT Team
  • 0 in reply to Luis Omar Moran
    Genius 4800 points
    Hello TI,
    Thanks for your quick answer.
    I saw your answer, and I have additional questions.

    1. If the signal from the MAC is 10Gbps and the signal to phy is 5Gbps, then is the remaining 5G lost due to packet loss?
    - it means I have to limit lane up to 5Gbps?

    2. In the case of 10Gbps to 10Gbps optic transceiver, is there any idea except bypass function?
    - I actually did not understand your 8b/10b encoder/decoder : please explain more details.

    thanks,
    TS
  • 0 in reply to TS Yang
    TI__Genius 16150 points
    Hi TS Yang,

    1. Yes, the limit of the lane will be 5Gbps.

    2. In 10GBASE-KR mode, the 8b/10b block can be disabled in high speed side, this feature can be used for 1:1 operation.

    Thanks,
    Luis
  • 0 in reply to Luis Omar Moran
    Genius 4800 points
    Hi Luis,

    thanks for your answer.

    1. I understand that 5Gbps can be sent down to Optic Transceiver to SFI interface (10Gbps) through rate limit in MAC chip.

    2. Is it possible to disable the 8b / 10b block and become the bypass function? I have additional questions regarding this.
    (1) TLK10034 also support if we are using an SFI interface other than 10GBase-KR?
    - At your answer, specify "In 10Gbase-KR" so ask for confirmation.
    (2) "1: 1 operation", does this mean that only one port is supported on the Quad chipset?
    Or does it mean that the top and bottom ports on 4 ports are only 1: 1 on 4 ports without Lane Swap?
    - In the latter case, there is no problem, but in the former case, it seems to be a problem.

    thanks,
    TS
  • 0 in reply to TS Yang
    TI__Genius 16150 points

    Hi TS,

    The TLK10034 is able to interface with SFP+ optical modules (SFI), to do this, Link Training and Auto-Negotiation should be disabled, and the device must be set in 10GBASE-KR mode since use the same PCS than 10GBASE-R.

    1:1 operation (retime in General purpose mode) is limited to 1Gbps to 5Gbps.

    Best Regards,

    Luis Omar Moran

    High Speed Interface

    SWAT Team