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TUSB1210 VDDIO question

bkpontiac
Prodigy 20 points
Other Parts Discussed in Thread: TUSB1210

I am trying to get detailed information about what protection if any exists inside the TUSB1210 USB transceiver chip. We are currently using this part in shipping products and recently found a design error where we are connecting VDDIO to 3.3V when the datasheet says max V is 1.8V. What is our potential for failure here? We are also running 3.3V interface signals into the 1.8V IO lines. Do you have schematics of the IO on the part that can be shared? What exactly will fail inside from doing this?

  • 0
    TI__Genius 11280 points

    Hello bkpontiac,

    You must not supply any VDDIO voltage beyond the absolute maxium ratings specified at the datasheet. The potential failure is the permanent damage of the device.

    Please check the TUSB1210 EVM user guide for further details.

    Regards,

    Gerardo

  • 0 in reply to Gerardo
    Prodigy 20 points

    I was hoping for a little more details that the blanket "permanent damage".  I realize that we are doing something bad.  I was hoping for more details on what kind of protection is inside the part.  Are there clamp diodes on each I/O pin?  Anything on the VDDIO pin itself?  Looking for information that is not in any of the public documentation.

    Thanks.