do you mean that the midlayer2-4 were all routing layers, not plane
layers?
poured planes?

Dennis Saputelli

Brian Guralnick wrote:
> 
> Hi Georg,
> 
> Here is my successful 6 layer 200Mhz design with high speed digital on top &
> bottom, and analog on top.  1.5 ns typical rise & fall times, >75db
> isolation from digital to analog section.
> 
> Top            -> High speed digital & Analog
> MidLayer1 -> Mid speed digital
> MidLayer2 -> Split VCCINT 1.8v & AGND
> MidLayer3 -> DGND
> MidLayer4 -> VCCIO 3.3v
> Bottom       -> High speed digital
> 
> _____________
> Brian Guralnick
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