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Cascading a DML connector model

hjsteger

I have a "generic" DML model for a mating pair of connectors. This model is supplied by the connectors' vendor for a family of their connectors - that's why I termed this model "generic". This model is for the connector in its 2 columns by 12 rows configuration.  The model has a total of 48 ports.  The supplied model has a 24 coupled signal subckt - all 24 pins are coupled together in this dml file.

Unfortunately, my design uses this connector in the 2 column-by-20 row configuration.  How can use the supplied 24-pin model to model the 40-pin version of these connectors?  Is there a way to cascade these models to handle the 40-pin case?

  • Khurana

     Yes, there's a way - have done it in the past.  There used to be an app note on this at cdnusers.org but since that's no longer there and I am unable to find the specific app. note at both pcb & ic + sip communities, I am not sure what to tell you but just to point you in the right direction...launch Model Integrity > click Tools > Generic Spice > Wrap Spice Model in DML > click Help.  Read the section on Reordering & Renaming pins in a DML Spice Model.

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