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TUSB8042: Recommended trace length

Part Number: TUSB8042


Hi Team,

The datasheet states that:

What does the "eight inches" include? Does it mean the total length of the differential pair from the USB host to the USB device?

I would like to know about the recommended trace length between 1) the USB host to the hub and 2) the hub to the USB device.

Thanks! 

Roy Hsu