John, There is an updated spec on the jedec website which corrects the Vih(ac) & Vil(AC) to 0.31v. (apparently this is the intended value, and the spec you viewed had some production issues) See http://www.jedec.org/download/search/jesd8-9b.pdf Fred -----Original Message----- BTW, the book identifies Vih(ac) and Vil(ac) at 0.31, but the specification has 0.35. Is this an old specification? http://download.micron.com/pdf/misc/sstl_2spec.pdf#search=3D3D%22sstl_2%2= 2 ------------------------------------------------------------------ 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org 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