[SI-LIST] : Definition for rise time?

Weber Chuang ([email protected])
Wed, 10 Jun 1998 11:40:41 +0800

> Hi SI-gurus,
> Risetime and falltime are often mentioned in SI world, and
> sometimes used to classify lots of problems. My question is when we
> talk about a risetime of 1 ns, are we talking about loaded risetime?
> or unloaded risetime? If loaded, then what's the default load used,
> for example, a driver(I/O cell) might have a measured risetime of more
> than 1 ns with it's load, yet from simulation we can run it without
> any load, then the risetime might become less than 1 ns, so how should
> we define the risetime of this pad.
> Best Regards
> Weber Chuang(ChingFu Chuang)
> SI Engineer, System Team.
> VIA Technologies, Inc.
> Taipei, Taiwan, ROC
> http://www.via.com.tw
> Very Innovative Architecture
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