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About RSVD pin of TFP403

avraka
Intellectual 855 points
Other Parts Discussed in Thread: TFP403

Dear TIer.

The datasheet of TFP403 described Pin #42 must be tied to high for normal operation.

If I tie this pin to ground or left float, what will be happened?

  • 0
    TI__Guru* 76130 points

    Hello,

    The device will not work. I can'd disclose what is the internal function of that pin but it is for testing purposes. You need to connect it to Vcc as indicated in the datasheet.

    Regards.

  • 0 in reply to Elias Villegas M.
    Intellectual 855 points

    Thanks for your reply!

    There is an additional question.

    My customer was placed with the pin left open.

    And they say  there are no problems in pre-productions and it works well.

    If they leave this RSVD pin float, the output signal such as RGB or Sync  cannot be output sometimes?

  • 0 in reply to avraka
    TI__Guru* 76130 points

    Hello,

    I reviewed more information and found that this pins is actually the CTL3 signal, so you will probably not see issues with your output, however it could cause EMI interference if left floating. Also the device functionality is only guaranteed when your follow the Datasheet Specification so I would recommend to connect this terminal to 3.3V

    Regards.