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TUSB1210 power sequence

Dylan Yao
Genius 9180 points
Other Parts Discussed in Thread: TUSB1210

Hi Team,

In TUSB1210 datasheet page 12, there is a diagram describe power sequence. Could you please confirm: the VDD33 must be early than VDDIO and VDD18?

As in datasheet 6.4, It says VBAT must be early than VDDIO. So also the VDD33?

But in my application, the VDD18 is early than VDD33, is there any issue?

In TUSB1211, there is no description about this?  Can we use TUSB1211 in this situation?

Thanks.

Best Regards

Dylan

  • 0
    TI__Guru* 76130 points
    Hello,
    The power-up timing must be met.
    That being said, I find a little odd that the TUSB1211 does not specify that on the datasheet, please give me a couple of days so I can talk with the device champion.
    Regards
  • 0
    Intellectual 565 points
    I really can't recommend using the TUSB1210 as this issue I raised a long time ago, and despite promises is still unresolved:
    http://e2e.ti.com/support/interface/digital_interface/f/130/t/367875

    The ex Cypress parts such as the USB3300 range, now microchip, seem to get a much better press and have a longer pedigree than TI's parts. All TI have to do to change my views on the TUSB1210 is to have address the issue I've raised. Perhaps the TUSB1211 uses a different silicon design, in which case the 1210 ought not be recommended for future designs? I'm therefore rather interested in this topic.

    I wish you well with your design.
  • 0 in reply to Mike Perkins
    Intellectual 565 points

    Was the TUSB1210 designed by TI or some third party?


    There is no support for this device.


    If it doesn't work, and is not supported, it might be a good idea to inform us?  Better still take it out of the catalogue?


    Is the TUSB1211 based on the same or similar architecture? Should that be considered toast as well?