[SI-LIST] Re: Shoots
- From: Raymond.Leung@xxxxxxxxxxx
- To: a.ingraham@xxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Tue, 11 May 2004 09:04:57 +1000
Andrew,
To my best understanding +0.3/-0.3 overhots from rail voltage is really
a dc spec., at least the designers in our group consider it in this way.
I believe nowadays no I/O designers would not consider the real world
transient when they work out the pad designs. I am not a product
engineer, but I think the problem may lie in the cost of testing when in
mass production if an ac transient is specified in the data sheet.
Regards,
Raymond
"Ingraham, Andrew" <a.ingraham@xxxxxxxx> on 11/05/2004 00:52:51
Please respond to a.ingraham@xxxxxxxx
To: si-list@xxxxxxxxxxxxx
cc: (bcc: Raymond Leung/sdc)
Subject: [SI-LIST] Re: Shoots
>In my opinion, the VDD+0.3V / VSS-0.3V spec is overly conservative, and it
>is almost definitely a DC spec where AC transients aren't included or
>weren't considered. They are probably "covering their asses" so to speak,
>and never bothered looking at their ICs in anything other than a carefully
>controlled test environment.
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