The 16F818/9 brag about 'mircopower technology' or something like that. I think they mean that there is an internal oscillator that can be varied in frequency, using very little current in the slowest setting. Recxent experience learned that the internal oscillator is not sufficently accurate for serial communication. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products > I'm looking for a simple PIC (3 IO, sleep mode, 1 interrupt input from > sleep) that uses *very little power*. > I can use sleep mode to safe some extra power. > In the past we've used 16C54, but I wonder if there's a more > modern PIC > with onboard (accurate) oscillator. > I've search Microchip sites, but there parametric search > didn't support > power consumption. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body