[SI-LIST] Re: 6 layers stackup
- From: "Filip, Cristian" <Cristian_Filip@xxxxxxxxxx>
- To: "Jory McKinley" <jory_mckinley@xxxxxxxxx>, "Fernando Yuitiro Mori" <mori@xxxxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Wed, 20 Feb 2008 17:10:10 -0700
Jory,
I wouldn't be so concerned about the decoupling between PG if the thickness of
the board is 62 th. I guess the separation between planes in S1 S2 G P S3 S4
stackup is so big that the capacitive effect doesn't count too much.
I would rather plan the new stackup depending on other requirements (impedance,
crosstalk, delay, etc.). From many points of view the new structure looks even
better (i.e. crosstalk).
Regards,
Cristian Filip
________________________________
From: si-list-bounce@xxxxxxxxxxxxx on behalf of Jory McKinley
Sent: Wed 2/20/2008 6:40 PM
To: Fernando Yuitiro Mori; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: 6 layers stackup
Frenando,
I would be concerned with any high frequency current requirements that are not
meet by the decoupling between PG. Also, look out for return loops that might
be bigger than expected, say for S4. Probably want to route differentials on
the inner layers due to mismatched propagation of diff mode/comm mode on outer
layers. Just a few points to think about,
-Jory
----- Original Message ----
From: Fernando Yuitiro Mori <mori@xxxxxxxxxxxxx>
To: si-list@xxxxxxxxxxxxx
Sent: Wednesday, February 20, 2008 3:17:55 PM
Subject: [SI-LIST] 6 layers stackup
Hi,
I normally use S1 S2 G P S3 S4 for the 6 layers stackup. I need the 4 layer
with 60 ohms, so there are some problem if I use S1 G S2 S3 P S4?
Regards,
Fernando Mori
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.net <http://www.si-list.net/>
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
____________________________________________________________________________________
Be a better friend, newshound, and
know-it-all with Yahoo! Mobile. Try it now.
http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.net <http://www.si-list.net/>
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
