Hi! If i am calculating the total load capacitance faced by the driver, can i use this equation: Ctotal = C(trace)+ C(via) +Cin(i/p cap. of load)+ Cout(o/p cap of driver) Now if I add 5% then can I safely assume that if the I?O is designed to drive this load then on the real board there should not be a problem fro the driver to source or sink current. Thanks in advance Bob __________________________________________________ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/ ------------------------------------------------------------------ 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