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TMUX1574: IBIS model parameter setting

Part Number: TMUX1574

Hello, 

 One customer downloaded the TMUX1574 IBIS model from its product folder and he used the hyperlynx tool to open it, he found that all the IO direction is input type, if there is any way to make 

D2(pin5,6,7)channel to output type? How to edit? 

Best regards

kailyn

  • The SEL and /EN pins are inputs. The switch channels are not buffered; they are neither inputs nor outputs. (I do not know why HyperLynx shows them as inputs; it might be doing this in order to model the power/ground clamping diodes.)

    [Pin]    signal_name     model_name
        1   SEL          inbuf
        2   S1A          sterm
        3   S1B          sterm
        4    D1          dterm
        5   S2A          sterm
        6   S2B          sterm
        7    D2          dterm
        8   GND            gnd
        9    D3          dterm
       10   S3B          sterm
       11   S3A          sterm
       12    D4          dterm
       13   S4B          sterm
       14   S4A          sterm
       15   ENZ          inbuf
       16   VDD          power

  • Hey Kailyn,

    As Clemens mentioned here, these wouldn't be inputs or outputs. These aren't actually buffered I/O's, they're just passive. Now as to why Hyperlynx calls them Inputs, i'm uncertain of. I'm not terribly familiar with Hyperlynx and have more familiarity with Advance Design Systems (ADS) for IBIS. That being said, I downloaded a version of hyperlynx and have taken a look and I think Clemens may be correct. I think that hyperlynx calls them Inputs to model the GND and Power clamps. The actually I/O path is a "series switch". When looking at waveforms, I could get the IV curve for the Series Switch 


    But I had to select the Model rather than selecting the pin, otherwise it defaults to the terminator models (Power/GND Clamps).

    Thanks,
    Rami