On Sun, May 6, 2012 11:09 pm, Xiaofan Chen wrote: > On Mon, May 7, 2012 at 10:33 AM, Matt Bennett > wrote: >> On Sat, May 5, 2012 10:21 pm, Marcel Duchamp wrote: >>> I'm sure that I am missing something hidden in plain sight but still >>> have not broken the da Vinci code for PIC names yet. >>> >>> Can someone here tell me exactly what the significance is of pics with >>> either K or J in the part number? =A0How do these vary from pics withou= t >>> the K or J? >> >> It has mostly to do with the Silicon process. The PIC18s and PIC24s, and >> dsPIC33s with a J are 3.3V parts. The Ks =A0are =A0a newer process that = is a >> mix of low power, lower voltage cores and higher voltage I/O. There are >> a >> mess of different io structures, so you need to read the data sheets. In >> general, a J will be cheaper than a non J, and a K will be even cheaper. >> > > It seems that there are two types of K, one is 3.3V and the other is > 5V, The 5V parts are more expensive than the 3.3V parts. Are they > from the same fab? I believe so, the 5V parts have some extra silicon to allow the low voltage core for low power, but still maintain the higher voltage io ring. More silicon or more testing leads to higher prices. Matt Bennett Just outside of Austin, TX 30.51,-97.91 The views I express are my own, not that of my employer, a large multinational corporation that you are familiar with. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .