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EDC PHY for OTU2/OTU2e/OC192/10GbE SR/LR (SFP+)

Toshiyuki
Mastermind 7075 points
Other Parts Discussed in Thread: DS110DF1610, DS110DF410

Hi,

I am looking for EDC PHY for OTU2/OTU2e/OC192/10GbE SR/LR (SFP+). Is there any solution that can be proposed?

In the meantime, could Retimer devices, DS110DF410,DS110DF1610 be compensated for Electronic Dispersion Compensation?

Best Regards,

Kato

  • 0
    TI__Mastermind 19235 points

    Hi Kato-san,

    Application note SNLA225 which I drafted addresses this question in great detail. See the link below:

    www.ti.com/.../litabsmultiplefilelist.tsp

    If you have any further questions after reading this doc, do let me know. The short answer to your question is that SFP+ 10GBASE-LRM is the only PMD variant requiring a full EDC PHY engine. However, the Ethernet market has mostly moved away from this solution, opting instead for multi-mode fiber links based on SFP+ 10GBASE-SR.TI's retimers can support all SFP+ PMD variants except for SFP+ LRM.

    Cordially,

    Rodrigo Natal

    DPS Applications Engineer

  • 0 in reply to Rodrigo Natal
    Mastermind 7075 points

    Hi Rodrigo -san,

    Thank you for the reply. I understand that SFP+10GBASE-LRM is requiring EDC. Though our customer's system isn't 10GBASE-LRM, they need EDC PHY for optical dispersion compensation. Could Retimer with DFE take the place of EDC PHY?

    Best Regards,

    Kato

  • 0 in reply to Toshiyuki
    TI__Mastermind 19235 points

    Hi Kato-san,

    Given the need to compensate for optical channel effects, EDC is required to meet the BER requirements of 10GBASE-LRM links (as specified by IEEE 802.3aq).

    For linear DWDM and ZR links, due to the use of single-mode fiber, the optical dispersion effects are less severe than the OM1 fiber optical stressors specified for 10GBASE-LRM links. Thus, a CTLE-DFE-based EQ architecture with sufficient boost such as the TI retimer can meet the link BER requirements. Moreover, customer system testing of our retimer while implemented in ZR and DWDM SFP+ optical links has shown good results.

    Regards,

    Rodrigo Natal

    DPS Applications Engineer