These parts with internal eeprom aren´t usually used in these 8051 cheap kits that are found... well, at least not in Brazil :-)

To buy a 805x and build a system by yourself means to have access to build/design a PCB at home... and with these SMD or PLCC, SDIP parts a CAD program for PCB layout is unavoidable.

So until I can learn how to use Eagle and find how to clean the percloride spots fast enough I'll have to use the bigger and feature less parts :-(

And like me I think that are others...