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TUSB522P: RX termination impedance in Shutdown-Mode

Hayato Akuzawa
Prodigy 80 points

Part Number: TUSB522P

Hello.

What is the value of the RX termination impedance when EN_RXD is driven low ?

Regards,

Hayato

  • 0
    TI__Guru**** 188841 points

    Hayato-san

    RX termination will be in high-z state when EN_RXD is driven low.

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Prodigy 80 points

    David-san

    Thank you for your answer.

    Would the Hi-Z state be Z (RX-HIGH-IMP-DC-POS) as described in the datasheet?

    Also, if the TUSB522 is set to Hi-Z status, is it possible to prevent the TUSB522 from being detected by the other party to which it is connected?
    (Because the impedance in U0 mode is very different from the impedance in Hi-Z state.)

    Regards,

    Hayato

  • 0 in reply to Hayato Akuzawa
    TI__Guru**** 188841 points

    Hayato-san

    Would the Hi-Z state be Z (RX-HIGH-IMP-DC-POS) as described in the datasheet?

    Yes, it is the same High-Z state.

    Also, if the TUSB522 is set to Hi-Z status, is it possible to prevent the TUSB522 from being detected by the other party to which it is connected?
    (Because the impedance in U0 mode is very different from the impedance in Hi-Z state.)

    Other device will not detect the TUSB522P RX termination since it is in shutdown mode and the RX termination is in High-Z state.

    Thanks

    David