• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 17 subscribers
  • Views 297 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMUX6112: D-S short when no supply voltage applied

[FAE] Andrew Wang
Genius 10685 points
Part Number: TMUX6112
Other Parts Discussed in Thread: TS12A12511

Hi Team,

As titled, customer wants a switch that can short the channel (D to S) when VDD/VSS is not applied (0V).

If no, further question is if there is existing device in TI that does so? Customer is looking for wide voltage mux +/-15V.

It's quite interesting that customer told me they have tested TS12A12511, when no supply voltage applied, they found COM and NO pin are shorted, I haven't verified myself, so if any idea, please let me know.

Thanks!

Andrew

  • 0
    Guru 318700 points

    TI does not make any such device.

    In that test, it's likely that the TS12A12511 kept the last setting because if internal capacitances. But there is no guarantee whatsoever; in the general case, I'd expect that all MOSFET gates are discharged and all channels are disconnected.

  • 0 in reply to Clemens Ladisch
    TI__Genius 10685 points

    Thanks for confirm, Clemens!

    So just curious, have you heard any other vendor offering such solution as of today?

    Thanks!

    Andrew

  • 0
    TI__Genius 10974 points

    Hello Andrew,

    We do not have any devices that incorporate depletion mosfets, so operation at 0V is not possible at this time for out devices.

    In regards, to the TS12A12511 being turned on when there is no supply voltage, that is not possible if the device is operating properly. The only way that could happen is if there is damage to the device or there is some stray capacitance that is being charged on the output causing there to be some voltage reading. The device cannot close the switch if there is no power supplied to the IC.

    Thanks!

    Bryan