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TMUXHS221: TMUXHS221NKGR USB EYE Mask Specification/data.

AMARNATH G
Prodigy 245 points
Part Number: TMUXHS221

Tool/software:

Dear TI,

As we are using TMUXHS221NKGR (USB2.0 480Mbps) in one of our designs and we wanted to know the EYE Mask Specification/data for TMUXHS221NKGR to conlcude on the SI simulation.

Thank you.
Regards
Amarnath G

  • 0
    Prodigy 245 points

    Dear TI,

    One another clarification with respect to TMUXHS221NKGR, Since TMUXHS221NKGR is a Passive MUX can we please know why is the IBIS Model provide for TMUXHS221NKGR Passive MUX?

    Attaching the screen shot for your reference with the highlight on the Passive MUX.

    Regards
    Amarnath G

  • 0 in reply to AMARNATH G
    TI__Mastermind 35208 points

    Hi Amarnath,

    The eye diagrams are in the datasheet. Are you looking for the raw data files? We have some s-parameters files that may be more useful: TMUXHS4212_s4p_v1.zip

    We sometimes create models in IBIS for passive devices. I'm not exactly sure what the question is but I'm understanding this as concern that it isn't actually a passive mux. It is one. IBIS does allow for some passive devices to be modeled (although I understand it doesn't feel as though it belongs in that modeling environment) 
    Sometimes, specific customers/engineers may ask for a model and we generate them and decide, even if it won't be much use to the majority of customers using the device (most prefer s-parameters for high speed devices), it may be useful to someone else so we will put it online for all to use-which is the case for this device as I was actually involved with generating the IBIS here for.  


    -Rami

  • 0 in reply to Rami Mooti1
    Prodigy 245 points

    Hi Rami,


    The s-parameters shared have some passivity issues, reciprocity issues and causality issues (images attached below) due to which we are having difficulty performing AMI simulations.

    Please share the s-parameter files with these issues fixed.

    We can observe that s(1,2) and s(2,1) are not reciprocal, s(3,4) and s(4,3) are not reciprocal

     

    Regards
    Amarnath G

  • 0 in reply to AMARNATH G
    TI__Mastermind 35208 points

    Hi Amarnath,

    I've reached out to my internal team that handles the S-parameters to see what feedback they can provide. I will keep you posted

    Thanks,
    Rami