M. Adam Davis wrote: > On 4/12/06, Stef Mientki wrote: > >> I need a very low power application, >> so the best from microchip I could find is the 16F87 or 16F88. >> >> (MPS 430 from TI seems to be much better, >> but as I'm not familiar with these chips ...) >> >> Now the 16F8x, running at 32 kHz, still consumes (about 3..5 times) too >> much. >> > > Wow. Out of curiosity, how little power do you have? Last night I > programmed a 3 digit LCD counter using a 16f877 and found that without > using any low power modes it only consumes 23uA at 3V. That'll run > for over a year on a CR2032 with the LCD on full time. > My first goal was to run 10 years on a CR2032 ;-) then the consumption should be less than 2.5 uA. Now the goal is 10 years on a CR2450 (+600 mAh), so I can afford about 7 uA. With 5uA for the WDT, 0.5 uA for the sleeping PIC, an extra 0.5uA for the PIC when it's running, I still have a whole 1 uA for the detector. Should be doable. cheers, Stef -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist