Bob Bremer, Mgr. Signal Integrity
Litton Systems.
>-----Original Message-----
>From: fabrizio zanella
>[SMTP:fabrizio=zanella%Eng%[email protected]]
>Sent: Thursday, July 17, 1997 7:55 AM
>To: [email protected]
>Subject: 3.3V/5V planes
>
>Stuart, I would recommend a more symmetrical stackup for your board with
>one extra layer. With this stackup every signal layer references a ground
>layer, and the board is more manufacturable.
>
> 1 -------------- top
> 2 -------------- signal
> 3 -------------- ground
> 4 --------------- +5V
> 5 --------------- signal
> 6 --------------- ground
> 7 --------------- signal
> 8 --------------- +3V
> 9 --------------- bottom
>
>Regards,
>
>Fabrizio Zanella
> Sr. Design Engineer
> Hardware Engineering
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>4645
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>