[SI-LIST] Re: Driving current


Chai wrote:

>I have a question regarding the driving currents of IC.
>Say, I get the following information from the Data Sheet:

>Iol=4mA  at Vol=0.4V
>Ioh=-4mA at Voh=2.4V

>How can I extract the same information from the IBIS?
>.... But I discover that the Pullup and Pulldown currents in
>the IBIS are always much larger as compared to currents given in Data
Sheet.

The specification of +/- 4mA is a guaranteed minimum current. Due to the
process, temperature, and voltage variations the typical performance found
in the IBIS model is much larger than worst case. From worst  to best case
variations can sometimes be a 4:1 change in performance.

--------------------------------------------------------------
| Bill Cohen
| Toshiba America Electronic Components, Circuit Design Group
| email: wcohen@xxxxxxxx
| office: (508) 486-1031               fax: (508) 481-8828
--------------------------------------------------------------



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