Don't forget that schottkys can have significant reverse leakage, more so a= s temperature increases. For a RAM backup application with a coin cell, minimum leakage may be more = important than minimum Vf --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .