Re: IBIS BIRD62.2 Comments and Questions

Bob Ross wrote:

> The remaining questions address some details.
>
> 2. Does JEDEC expect these parameters to be defined
> at the die or at the pin? Are they insensitive to
> ground and power bounce effects if Vref is tied to
> VDDQ?

JEDEC, like IBIS, is focused on observable-at-the-pin
parameters. The threshold guardbands provide room
for the manufacturer to include noise margins.

Someday, this is likely to change from sheer necessity.

-- 
D. C. Sessions
dc.sessions@vlsi.com