On Tue, 1 Jun 2010 13:36:44 -0600, "YES NOPE9" said: > When I was using the Microchip MCU parametric search, I did not see > a filter for on-board power regulator. Did I miss something > obvious ? The 16HV series has a shunt regulator. It works quite well and saves using an external zener or TL431. Cheers, Bob -- http://www.fastmail.fm - Choose from over 50 domains or use your own -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist