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TMUX1574: What do the eye diagrams Figure 25 and Figure 26 attempt to illustrate?

Adam Torma
Mastermind 45575 points
Part Number: TMUX1574

E2E,

I am interested in the TMUX1574 and have some clarifying questions. Can I please get some assistance with the following questions?

  • What are Figures 25 and 26 attempting to illustrate?
  • Are there any additional block diagrams of this part? The customer would like to understand why the TMUX1574 can’t buffer.  Below is input we provided to customer: 

 From similar/older devices analog mux are implemented with pass FET architecture (NFET in parallel w/ PFET, gates tied together) represented by the classic switch in the block diagram.  If it was buffered there would be additional block representing output stage and associated configuration (push-pull, open drain, etc).  Another item is the datasheet specs RON of the switch and a buffer would present a high impedance so this would not be possible.

 

Thank you,

Adam

  • 0
    TI__Expert 3900 points

    Hi Adam,

    Figure 25 and 26 in the datasheet are Eye diagrams for the TMUX1574. The eye diagrams help to highlight that the TMUX1574 can be used in high-speed communications without impacting the digital signals with a lot of jitter or distortion.

    Here is a link to the precision labs video on eye diagrams: https://www.youtube.com/watch?v=tZiKRfH2yZ4

    You are correct the TMUX1574 does not have an integrated buffer  as it is a passive fet switch as you mention.