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Visitor II
January 24, 2020
Solved

Can I swap D+/- pins on the ECMF4-20A42N10?

  • January 24, 2020
  • 2 replies
  • 1046 views

The pinout of the connector and USB controller I am using means that I need to flip the differential signals either side of the ECMF4-20A42N10.

The layout would be a lot cleaner if I could swap D+/- signals on this device. For example:

Swap Pins 9/10 and 1/2. So the flow through direction is still the same, but D+/- signals are swapped.

From the representation diagram in the datasheet it appears I can, but I would like to confirm please.

Thanks,

Peter

    This topic has been closed for replies.
    Best answer by FGUIT

    Dear Peter,

    You can swap D+/- on ECMF4-20A42N10 without any issue, as lines D+ and D- are identical.

    So swapping pins 9/10 and 1/2 is OK.

    An important point is to let pins 1,2,4, 5 on connector side, as there is ESD protection against IEC 61000-4-2 ESD.

    Best regards.

    Fabrice.

    2 replies

    FGUITAnswer
    ST Employee
    January 24, 2020

    Dear Peter,

    You can swap D+/- on ECMF4-20A42N10 without any issue, as lines D+ and D- are identical.

    So swapping pins 9/10 and 1/2 is OK.

    An important point is to let pins 1,2,4, 5 on connector side, as there is ESD protection against IEC 61000-4-2 ESD.

    Best regards.

    Fabrice.

    PBainAuthor
    Visitor II
    January 27, 2020

    Thanks! I thought as much, just wanted to confirm.