Noel, Why not just Google the chip numbers? There is a wealth of information on the Max232 series of chips on the web and it's probably easiest to get the information directly. 73, Scott, N9AA VE2RYY wrote: > Hello > I would like to know what is the difference between a MAX232 and a MAX 232 CWE or even CWE-T?????etc etc > Idea???? > NOEL >