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TUSB8041-Q1: How to use Power Control Polarity

Takuma Ito
Expert 5200 points
Part Number: TUSB8041-Q1

Hello, could you tell me what the purpose of PWRCTL_POL? Is this to support external power switch's Enable polarity? 

  • 0
    TI__Guru 64326 points

    Hi,

    PWRCTL_POL controls behavior of PWRCTL pins. This correct, this pins allow customer to support both active high and active low EN pins on there power switch. Connect a 4.7-kΩ pull-down resistor to GND or leave NC to use internal pull-up resistor. This indicates active high polarity for the PWRCTL pins on the downstream ports.