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DP83826I: DP83826A vs DP83826

Jan D
Guru 79905 points
Part Number: DP83826I
Other Parts Discussed in Thread: DP83826AI, , TPD4E05U06, DP83826AEVM

Tool/software:

Hi Team,

What is difference between DP83826I and new DP83826AI?

Thanks,

Jan

  • +1
    TI__Mastermind 30450 points

    Hi Jan,

    DP83826AI has improved EMC performance over DP83826I.

    • DP83826A has ESD performance rated for Class A requirements at 8kV.
      • DP83826I supports 8kV ESD testing but does not meet Class A standards 
    • DP83826A adds an additional strap on RX_CLK to better configure the device for preventing link drop.
      • This gives more options for the FLD mechanisms that will cause the PHY to drop a link. 

    Best,

    Shane

  • 0 in reply to Shane Hauser
    Guru 79905 points

    Hi Shane,

    Thank you for your comment.

    • Please correct me if I not understand things properly. DP83826A and DP83826I supports 5kV ESD by device itself. With external protection like TPD4E05U06 both devices supports 8kV ESD. Advantage of DP83826A is that 8kV ESD is at Class A. Correct?
    • I have layout for DP8326 at my new design. I use device at ENHANCED mode with CLKOUT via pin 31. Can I replace DP8326 with DP8326A wihtout additional changes (e.g. adding strap resistors)?

    Thank for answer

    Regards,

    Jan

  • 0 in reply to Jan D
    TI__Mastermind 30450 points

    Hi Jan,

    1. Correct. The 8kV values were validated on the DP83826/A EVMs which includes an ESD diode and magnetics.

    2. Yes you can treat the DP83826A as a drop in replacement. You can optionally add a PU/PD for the RX_CLK strap, though this is not required.

    Best,

    Shane

  • 0 in reply to Shane Hauser
    Guru 79905 points

    Hi Shane,

    Thank you. Jut a last question. Have ever been tested DP83826 for IEC 61000-4-5 (surge immunity) without additional protection diodes (that means magnetic + DP83826 only)?

    Regards,

    Jan

  • 0 in reply to Jan D
    TI__Mastermind 30450 points

    Hi Jan,

    The test results for the DP83826A EVM are shown in the DP83826AEVM User's guide:

    These tests were all performed with the ESD diode and magnetics on the EVM. Please note that in 'Class A' test passes, data was transmitted through the PHY during the test. This means the ESD diode was not actually triggering because data could still be passed through. In these tests, we expect the same result with or without the ESD diode.

    Best,

    Shane

  • 0 in reply to Shane Hauser
    Guru 79905 points

    Hi Shane,

    Thank you.

    Jan