• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 17 subscribers
  • Views 398 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.

TMUX1072: Using supply pin in combination with the Logic Protection as EN signal

shashank sharma
Prodigy 515 points
Part Number: TMUX1072
Other Parts Discussed in Thread: TMUX1574

Hi,

Can I use the VDD pin as an ENABLE (output update with defined timing)? One would pre-select the channel setting logic and then power up / EN the Mux so that this particular output would turn on - say for a defined time. Imagine you would want to time division Multiplex PWM signals. 

We would need to know if the turn on time and the shut down time can be characterized and if using the supply pin as the output update trigger is designed in a way that can used permanently power cycling the MUX or if we hit lifetime limitations.

  • 0
    TI__Mastermind 45575 points

    Shashank,

    Why do you want to use the supply pin to turn off the device instead of using the control logic pins?  

    The TMUX1072 datasheet describes the turn off time using the Vcc pin to isolate the signal path but it doesn't describe the turn on time using the Vcc pin.  I expect the turn on time is slightly longer using the supply pin than with the OE pin.

    The TMUX1574 does have the device turn on and turn off time specified using the VDD pin.

    Thank you,


    Adam

  • 0 in reply to Adam Torma
    TI__Expert 6460 points

    Hi Team,

    I was just curious if the part could be used like this. As an example I was thinking of a switched integrator or slop conversion circuit. If one had different capacitors selected by the Mux gain ranging could be achieved. The timing, however could always be controlled by the same signal.

    kind regards

    Lutz