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SN74LVC1G3157: Could you give me the Un-encrypted spice model of SN74LVC1G3157?

Roman Barskov
Prodigy 40 points
Part Number: SN74LVC1G3157

Hi team,

Could you give me the Un-encrypted spice model of SN74LVC1G3157?

Best regards,

Roman Barskov

NTO IRE-Polus, Design Engineer

  • +1
    TI__Mastermind 35208 points

    Hey Roman,

    I believe you're talking about the HSPICE model on the product page? We no longer support HSPICE and don't have a way to unencrypt the files. That being said, our models will be encrypted either way.
    Is there something in particular you're looking for that i may be able to help with modeling? We have an IBIS signal integrity model and you can model the muxes signal channel with an RC circuit where the R is the on resistance across the signal path and C is the on capacitance to ground. IBIS will have a more detailed model than the passive but both can give a good modeling approximation.

    Thanks,
    Rami

  • 0 in reply to Rami Mooti1
    Prodigy 40 points

    Hello, Rami

    Thanks for your reply!

    Do you have a finished model on SN74LVC1G3157?

  • 0 in reply to Roman Barskov
    TI__Mastermind 35208 points

    Het Ramon,

    Models can be found in the product folder in the "design & development" section under "design tools & simulation"

    Thanks,
    Rami

  • 0 in reply to Rami Mooti1
    Prodigy 180 points
    Rami Mooti1 said:
    That being said, our models will be encrypted either way.

    So there's no chance to ever get a spice mode for the SN74LVC1G3157 to simulate in LTspice?

  • 0 in reply to Friedl
    TI__Mastermind 35208 points

    Hey Friedl,

    Even with an unencrypted file (which would require an NDA) the syntax would vary between the HSPICE file and LTspice. 

    A passive model will also do the trick in LTspice. It's a pretty simple approximation. In the onstate it would look like this :

    In the off state you can replace R1 with a 5.5Mohm resistance this should give the worst case off state leakage at 5.5V (using ohms law, R = 5.5/1uA leakage).
    If you want to add switching capability that can represent the logic, you can introduce a voltage controlled switch if it's available in the place of R1 and drive the logic with another source.



    Thanks,
    Rami