> put in some decent limits for the R and the C It does seem odd that (1) they'd make that little bit of silicon on the die so different from 'usual' and (2) omit the R and C limits diagram text found in other datasheets. Unless the two points are related - ie the silicon IS different and so the text had to be changed but they never got around to it Joe --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .