Bob Blick ha scritto: > On Thu, 18 Feb 2010 21:53:48 +0100, "Dario Greggio" said: > >> But now I have that doubt, in that that other datasheet does tell that >> the 2 windings are equal... > > Hi Dario, > > The impedance is the same, because the number of turns of wire is the > same. > > They are separate windings wound one on top of the other, and one uses > more wire and that is why the DC resistance is different. > > But DC resistance is not really important and should not be the deciding > factor about which winding to use for TX and RX. thank you Bob. I did not consider exactly the meaning of "DCR" :) , now I get it. But, still, in one datasheet I can read that DCR (1-3) =0.7 OHM and (6-8)=0.5 OHM, while in the other (the one you posted), we can see 0.7 Pin 1-3/6-8 & 1.1 Pin 11-9 So... well, I agree in that the inductance is what matters and it should be the same... but, where can I read it in the datasheet?? thx :) -- Ciao, Dario -- Cyberdyne -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist