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TUSB8041: Questions about unused pin termination

Takeshi Sasaki
Expert 4480 points
Part Number: TUSB8041

Hi Team,

Could you give me comments on following questions?

Q1. What should I terminate following pins in unused?

①USB_SSRXM_DN1 -> ?
②USB_SSRXP_DN1 -> ?
③USB_SSTXP_DN1 -> Opened?
④USB_SSTXM_DN1 -> Opened?
⑤PWRCTL1/BATEN1 -> Pull-down? what external resistor value is recommended?
⑥OVERCUR1z -> Pull-up? what external resistor value is recommended?

Q2. What is the internal pull-up and pull down resistor value for pins as indicated "PD" or "PU" in the datasheet?

Thank you for your support,

Best regards,

Takeshi Sasaki

  • 0
    TI__Guru 60870 points
    Sasaki-san,

    A1. Leave unused ports unconnected (1-4). PWRCTL1/BATEN1 should also be left unconencted (5). You can add an external pullup on OVERCUR1z (6) or leave it unconnected.

    A2. The strongest the internal pullup / pulldown resistor is +/- 250 uA so ~13K. Typical value is closer to 20K. We recommend overriding defaults with 4.7K resistors.

    Regards,
    JMMN