SN74LVC1G125: Unable to simulate in PSpice for TI (Design failed/Convergence errors)

Steven DuTemple

Part Number: SN74LVC1G125

Tool/software:

Hi,

I'm trying to simulate a circuit which includes several SN74LVC1G125 devices.

I am unable to get the simulation to run - I am continually running into convergence errors or "Analysis failed" errors.

I have a very simple circuit that illustrates this behavior and would appreciate any assistance you can provide. Thanks in advance.

10 months ago

0 Albert Xu1 10 months ago

TI__Mastermind 38015 points

Hi Steven,

I believe if you follow the instructions from this thread, it should fix the issue:

https://e2e.ti.com/support/logic-group/logic/f/logic-forum/1133261/sn74lvc1g126-sn74lvc1g126-pspice-model-error-values-must-be-monotonic-increasing?tisearch=e2e-sitesearch&keymatch=sn74lvc1g126%252520pspice#

0 Steven DuTemple 10 months ago in reply to Albert Xu1

Intellectual 350 points

Hi Albert,

I'm afraid I haven't been able to modify the model as suggested in the linked article. The problem would appear to be very similar, but I'm having trouble modifying the model for the part.

I've tried creating a new part based on the same model, but then receive an of type: "The model MY125 could not be found in configured libraries"

Since there does not appear to be support in Pspice for TI to edit a model's functionality, it's unclear exactly what procedure I should be following. I have found am online video which appears to describe the necessary steps, but it does not work in this case and I am unsure as to why.

Thanks for the suggestion, I just need to figure out HOW to perform the suggested modifications...

Regards,

Steve

0 Albert Xu1 10 months ago in reply to Steven DuTemple

TI__Mastermind 38015 points

Hi Steve,

Let me see if I can work this out for you, if not I can hand it off to our modeling team.

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SN74LVC1G125: Unable to simulate in PSpice for TI (Design failed/Convergence errors)