PECL is intended to work between +5V and GND, while LVPECL works between +3.3V and GND. Therefore the offset voltage is different. This difference has an effect on the Thevenin far end termination used for PECL and LVPECL lines. --- "Henrik G. Madsen" <hgm@xxxxxxxxxxx> wrote: > Hi > > I have seen several different DC specifications of > PECL and LVPECL. > > Does there exist some kind of 'official & approved' > = > standard/specification of PECL and LVPECL DC > requirement? > I.e. something like the JEDEC LVTTL standard. > > > _____________________________________ > Henrik G Madsen > Sr. HW Engineer, M.Sc.E.E=20 > Vitesse Semiconductor Corporation A/S > Ethernet Products Division > Hoerkaer 16, DK-2730 Herlev, DENMARK > Direct: +45 4485 5920 > Phone: +45 4485 5900, Fax: +45 4485 5901 > mail: hgm@xxxxxxxxxxx > web: http://www.vitesse.com > _____________________________________ > > > ------------------------------------------------------------------ > 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 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 > > __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com ------------------------------------------------------------------ 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 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