Naresh, For slew rates having lesser (faster) values that (1V/ns) you should use the 1V/ns value. Walter wkatz@xxxxxxxxxx -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Dhamija, Naresh Sent: Monday, June 20, 2011 1:10 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] DDR3 Derating for slew rate less Hi SI Gurus, I have gone through dome of the the old mails on DDR3 derating which helped me to understand the derating. My formulas based on those e-mails are working fine for signal having higher slew rate compared to normal (1V/ns), but for slew rate having lesser value than normal (1V/ns), I guess I am missing something. This information is also very little mentioned in those emails. Pls. help. Regards Naresh ------------------------------------------------------------------ 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 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 Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu