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Using Orcad SIGNAL_MODEL attribute

Hi,

We want to set up our Allegro Design Entry(Orcad) libraries so that when forward annotating to Allegro SI (Specctraquest), all parts come with an IBIS and Espice model automatically attached. It is a real hassle to have to manually attach them each time you create a .brd file
I have tried using the SIGNAL_MODEL = attribute in Orcad, in conjunction with a Specctraquest .dml library containing suitably named parts, but with no joy

Anybody got any ideas on how to set this up?

Originally posted in cdnusers.org by jdunn

archive over 20 years ago

Jdunn,

You might receive more prompt replies for your OrCAD issues on the orcad community site at http://www.orcad.com

Moderator

Originally posted in cdnusers.org by Moderator
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archive over 20 years ago

Hi,

I can get this to work by doing the following
1. Translate the ibis model into dml format using PCB SI or SignalXplorer
2. In Allegro Design Entry CIS (Capture CIS) you add the model name to the part using the SIGNAL_MODEL property.
e.g., from the attached ibis model you can reference the model names ALVC244_DGW, ALVC244_DW, ALVC244_NS or ALVC244_PW depending on the package type.
3. During the Tools, Create Netlist you need to go into setup, edit and add the following line to the [ComponentInstanceProps] section
SIGNAL_MODEL=YES

Now you can create the netlist and the model will be attached to the component providing your paths points to the libraries.

Best regards,
Ole Ejlersen
Technical Service Manager
Nordcad Systems A/S

Originally posted in cdnusers.org by ejlersen

sn74alvc244.zip
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archive over 20 years ago

Thank you

This works just fine now.

Originally posted in cdnusers.org by jdunn
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archive over 20 years ago

Hi,

You're welcome, did you get it to select the correct voltage model also? If so, how?

Originally posted in cdnusers.org by ejlersen
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archive over 20 years ago

No, I am just working to get a load of Espice models of passives added at the moment so I don't need to select different ibis driver models according to voltage (just yet)

Originally posted in cdnusers.org by jdunn
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