RE: [SI-LIST] : IBIS models

Abe Riazi ([email protected])
Sat, 28 Aug 1999 09:30:01 -0700

>Mike Mayer Wrote:
>I have found several IBIS models that use the [Pin] keyword but only
>model a couple of pins. For example, an octal buffer in a 20-pin
>package that only includes statements for one buffer input pin, one
>buffer output pin, Vcc and Gnd. My reading of the IBIS spec would say
>that this is non-compliant. In Section 5 under "Usage Rules" for the
>[Pin] keyword the first sentence states "All pins on a component must
>be specified.".
>1) Am I correctly interpreting the IBIS specification?
>2) How common are models of this type?
Hi Mike:

What you have described is one of the most common types of model
deficiency I have observed in IBIS models. however, in many cases it is
quite simple to fix this kind of model defect. Frequently, all that is
required to complete the pin mapping section of the model is the
datasheet of the device and an ASCII file editor.


Abe Riazi
>[email protected]

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