On Sun, 07 Mar 2010 12:58:57 +0100, "Dario Greggio" said: > Xiaofan Chen ha scritto: > > > Then there are clones like Exar XR4151 which might be > > what you want. > > wow how old!! must've been the 70s... > > Now that I think of it, can't one use a PIC and make up something? One > with pin-compatible power pins... Hi Dario, Yes, the age of the parts is what's really terrifying :) A PIC could be used, but I wonder what the relative accuracy would be using a PIC with its internal oscillator or external RC. Cheers, Bob -- http://www.fastmail.fm - Faster than the air-speed velocity of an unladen european swallow -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist