How about this: TOP/GND SPLIT PWR1/2 GND SIG1 - SERDES / DDR2/High Speed Signals SIG2 - DDR2 GND SIG3 - DDR2 SIG4 - SERDES / DDR2/High SpeedSignals GND/ISOLATED PWR (covered by bottom ground and no signal reference) BOTTOM/GND Jory McKinley McKinley Consulting e-mail: jory_mckinley@xxxxxxxxx phone: (774)-285-2859 ________________________________ From: steve weir <weirsi@xxxxxxxxxx> To: si-list@xxxxxxxxxxxxx Sent: Wednesday, August 8, 2012 1:46 PM Subject: [SI-LIST] Re: 10 Layer Stackup Recommendation for Board with High speed Signals(SERDES/DDR) That stack-up could be in real trouble: Big cavities, plus lot's of single-ended injection usually spells trouble. If you plan to route the DDR2 Manhattan using L3 and L8 as a routing pair, then about your only hope is if you forgo Power2 and make that also GND. Otherwise, something will have to give. Steve On 8/8/2012 6:32 AM, Prashanth Rajappan wrote: > Hi All, > I am looking for suggestions for our PCB which has high speed interfaces like > SERDES /DDR2/GIGA BIT Ethernet.The current stackup is given below. > > Top > GND > SIG1 - SERDES / DDR2/High Speed Signals > SIG2 - DDR2 > POWER1 > GND > SIG3 - DDR2 > SIG4 - SERDES / DDR2/High SpeedSignals > POWER2 > BOT > > PLease let me know your comments or suggestion regarding the same. > > Thank you in advance! > > > Regards > Prasanth > > ------------------------------------------------------------------ > 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 forum is accessible at: > http://tech.groups.yahoo.com/group/si-list > > List archives are viewable at: > //www.freelists.org/archives/si-list > > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > -- Steve Weir IPBLOX, LLC 150 N. Center St. #211 Reno, NV 89501 www.ipblox.com (775) 299-4236 Business (866) 675-4630 Toll-free (707) 780-1951 Fax All contents Copyright (c)2012 IPBLOX, LLC. All Rights Reserved. This e-mail may contain confidential material. If you are not the intended recipient, please destroy all records and notify the sender. ------------------------------------------------------------------ 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu