Re: [SI-LIST] : Power Plane for Internal Device Power?

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From: Lee Ritchey (leeritchey@earthlink.net)
Date: Thu Jan 27 2000 - 14:16:10 PST


What you will need is a plane large enough to provide plane capacitance large enough to support the very fast switching transients that the 1.8V supply
will be required to support.

Lee

phelan, tony wrote:

> If I have a device whose I/O are 3.3V and internal logic is powered from
> 1.8V do I need a power plane to supply that 1.8V or will a power strip to
> that device suffice? Another way of asking this I guess would be: Are all
> return path currents for the internal 1.8V signals handled internally to the
> device. If so then there would be no advantage to making the 1.8V supply a
> plane?
> Any comments on this would be appreciated.
>
> Tony Phelan
> EMC Corporation
>
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