Re: [SI-LIST] : RE: [SI-LIST]: Long bus or star?

Shayle Hirschman (
Mon, 29 Mar 1999 17:29:18 -0600

DC Sessions wrote>
>Assuming that you can still find something that slow, or can
>have one custom-designed (not cheap -- I know whereof I speak
>since custom I/O design is what I do here....)
>Lacking a supply of 74LS devices or a budget for full-custom
>silicon, you're pretty much stuck with the native edge rates
>for standard silicon. Assuming that your product is behind
>the curve but not too far (say 350-500nm technology, the
>stuff that likes 3.3v) then you can figure on worst-case (slow)
>edge rates in the 300-600ps range and fast-case ones about
>60% of that.
>IOW, 300ps or faster.

How far behind the curve is ABT and even BCT technology? I think edge rates
of 2 ns are quite relevant to many people's work. Avoiding edge rates in
the psec range is sometimes a good idea, and can be done so without LS

Does anyone remember a family by, I think National, called Damn Fast?


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