You might check out Maxim's MAX3372-8 and MAX3390-93
>
> I need to convert a couple 5V logic lines out of a PIC running on 5V to 3V
> levels to drive a MultiMedia card. I've seen some 3V PLDs that have "5V
> tolerant" inputs. Does anyone know of a simple buffer like that? One that
> I'd be able to power with my 3V supply, but drive the inputs with 0V and
> 5V?

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http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.