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DP83867IS: Recommend RJ45

Shuji Ishiwata
Mastermind 7755 points
Part Number: DP83867IS
Other Parts Discussed in Thread: DP83867IR,

Tool/software:

Hi All,


I have a question about DP83867.

I'm using WE-RJ45LAN as the RJ45 connector.

The WE-RJ45 LAN Transformer has a built-in center tap termination, but is it not recommended?

www.we-online.com/.../7499111446.pdf

Also, is the combination of the WE-RJ45 LAN Transformer and DP83867IR, which have separate built-in decoupling capacitors, not recommended?

www.we-online.com/.../74991114411.pdf

Which RJ45 do you recommend?


Best Regards,
Ishiwata

  • 0
    TI__Genius 11866 points

    Hi Ishiwata-san,

    We recommend RJ45 connectors like the second one with the separate decoupling capacitors for each center tap of the channel. 
    For your reference, below is the screenshot of the recommended RJ45 connector described in the datasheet. 


    Please let me know if you have any other questions. 

    Best,
    J

  • 0 in reply to J
    Mastermind 7755 points

    Hi J-san,

    Thank you for your reply.

    Please tell me the name of the RJ45 product you recommend.

    I checked the EVM but could not understand the RJ45 specifications.


    Best Regards,
    Ishiwata

  • 0 in reply to Shuji Ishiwata
    TI__Genius 11866 points

    Hi Ishitwata-san, 
    We typically recommend Pulse Electronics HX5008FNL according to the datasheet. This connector does not have built-in capacitors for the center tap so they will have to be placed externally. 

    Shuji Ishiwata said:

    Also, is the combination of the WE-RJ45 LAN Transformer and DP83867IR, which have separate built-in decoupling capacitors, not recommended?

    www.we-online.com/.../74991114411.pdf

    This connector would fit according to our recommendation also.

    Best,
    J

  • 0 in reply to J
    Mastermind 7755 points

    Hi J-san,


    Thank you for your answer.

    By the way, is the RJ45 (7499111446) like the one below a transformer that is not recommended for the DP83867IS?


    Best Regards,
    Ishiwata

  • +1 in reply to Shuji Ishiwata
    TI__Genius 11866 points

    Hi Ishiwata san,

    No, that transformer (7499111446) is not recommended because the center taps for all channels are shorted. We recommend center taps to be separate for each channel for the best EMI performance. 

    Best, 
    J