That is only 2 18F J-parts with Ethernmet, PIC18F66J60 and PIC18F67J60. There are aprox *90* 18F J-parts in total. Jan-Erik. Yigit Turgut wrote 2013-07-29 12:33: > I thought J stands for the embedded ethernet functionality ? > > > On Mon, Jul 29, 2013 at 1:12 PM, Jan-Erik Soderholm < > jan-erik.soderholm@telia.com> wrote: > >> From : >> >> http://www.microchip.com/pagehandler/en-us/family/8bit/architecture/pic1= 8.html >> >> PIC18 "J" Series: >> Deigned for high memory density, cost sensitive applications. >> >> PIC18 "K" Series: >> Provides the highest performance with benchmark nanoWatt XLP >> extreme low power consumption. >> >> >> Also: >> >> >> http://www.microchip.com/stellent/idcplg?IdcService=3DSS_GET_PAGE&nodeId= =3D2553¶m=3Den028357 >> >> >> http://www.microchip.com/stellent/idcplg?IdcService=3DSS_GET_PAGE&nodeId= =3D2895¶m=3Den541407 >> >> I have not found any side-by-side comparision, but one major >> thing seems to be that K uses up to 5V supply and J 3V... >> >> >> >> FWIW... >> >> Jan-Erik. >> >> >> >> Peter wrote 2013-07-29 11:48: >>> Spent most of the day without any success, researching on Microchip sit= e >>> and back archived emails + web, looking for a possible answer to the >>> following: >>> >>> What does the "K" in Microchip part numbers mean for example >> PIC18F44K20 ? >>> or >>> What does the "J" in Microchip part numbers mean for example PIC18F46J5= 0 >> ? >>> >>> I just picked these two from a list,thinking that it would help in >>> researching ... but sigh ... >>> >>> >>> datasheets for reference: >>> http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=3Den026338 >>> http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=3Den539708 >>> >>> When you go to almost the last page; to section "PRODUCT IDENTIFICATION >>> SYSTEM" >>> it offers no help. >>> >>> I found a previous (archived post back in 24/06/2011)post: >>> >>> [PIC] Figuring out Microchip part numbers? >>> >>> by HaroldHallikainen (with reference to different PIC) >>> >>> ..but isn't quite what I'm after... but in a way close. >>> >>> Having been away from PIC's for some years, Microchips product range ha= s >>> grown drastically. >>> >>> I don't have a part in mind yet to point this post to, otherwise I woul= d >>> link it here. >>> >>> I'm hoping there might be a document that explains this, or at least >>> narrows it down a little. >>> >>> Does anyone know of any documentation of sorts that might explain the >>> PIC part numbers? >>> >>> else what terms to type in to search for. >>> >>> Thanks >>> >>> Peter >>> >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .