The statement below is not true for all vendors. As far as I know, our specs
are valid at the pin (not the unpackaged die-pad) and they also include the
on-the-die SSO effects. (Of course we also supply IBIS models for our chips).
Vendors' data reflects buffers in non-packaged environment without
taking the SSO into account. For smart users, vendors sometimes supply IBIS
models for simulations. For "smart" users, vendors give the step_B option...
And... ... ... do not forget the reliability issue when a bus is switching
on a low voltage (0.25u/0/18u) process and the transients from the inductance
miht hurt oxide...
> D. C. Sessions wrote:
> > What causes ME to sweat nights is the fact that SSO causes driver
> > starvation. For the last couple of years it's the largest single
> > term in our clock-to-output timing.
> Since the tradition is to specify delays and timing with one output
> switching at a time, how accurate do you suppose vendor's data
> sheets are, these days?
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