I have a problem of a TUSB4041I USB ports failing.
The likely origin is a malfunctioning USB device attached to one of the ports on the TUSB that shorts, approx 0.95Ohm, one of the data lines, in this case D-, to GND.
After this device has been plugged into the port, that port no longer functions either at all och any device connected to it cannot be used properly. Either no HW changes can be detected on the USB Host or the device is listed as malfunctioning and cannot be used.
So my question:
Can the D+/D- pins on the TUSB4041I withstand a short to either GND or VBUS?
According to USB 2.0 specifications revision 2.0 under section 7.1.1 Short circuit withstand:
"A USB transceiver is required to withstand a continuous short circuit of D+ and/or D- to VBUS, GND, other data
line, or the cable shield at the connector, for a minimum of 24 hours without degradation."
This has since been changed to only include GND and not VBUS in the specification of USB, but since the malfunctioning device shorts to GND the TUSB4041I should be able to withstand this.
