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TS3A27518E: Do I need Pull-up resistor on signal path for eMMC applications?

Alice57
Intellectual 1730 points
Part Number: TS3A27518E

Hi Support Team,

TS3A27518E is working properly without any external components on data line. It is mentioned in datasheet. But how about interface with eMMC? In eMMC specification, external pull-up needed for data line. Do I needed to add pull-up resistor on the data line between TS3A27518 and eMMC?

Best regards

  • 0
    TI__Expert 3180 points

    Hello Sunja,

    The TS3A27518E is a bidirectional switch and is not application specific which means for many applications, you would not need one. However, the interface with eMMC is a very specific application, as I am sure you are aware. With that in mind, you would follow the standard for that of the eMMC  because there are certain outputs that are open drain, which means they would require a pull up resistor.

    Please refer to this link for more information:

    www.zeroplus.com.tw/.../201207-eMMC_en.pdf

    Another thing i think you should keep in mind for this application is the speed and whether our bandwidth matches what your end application will be.

    Please see link below:

    e2e.ti.com/.../437256

    There is a brief section here on how to decide on whether the speed of application fits the switch you have chosen.

    Thanks,

    Louie

    If I have answered your question please hit the Verify Answer.