TI just came out with some capacitor-based digital isolators, higher speed / lower power than opto, and not so cheap either, as I recall. Maybe you can get more in a single IC though. Anyway, browse TI for a bit. Plus, for USA people anyway, their samples policy is absolutely the best... (sent out from digikey w/free overnight shipping!) J Vasile Surducan wrote: > Parallel busses are difficult to isolate. The cheapest way is the > optocoupler, there are 4 and 8 in one pack. But if you have also speed > requirement, then optocoupler must have internal schmidt trigger and a > logic gate inside. Check at Agilent, but there are many other > producers. > > Vasile > > On 5/8/06, Przemyslaw Lopaciuk wrote: > >>Hi, >> >>I need to fully isolate two boards which are connected with 34 PIN >>cable. ( one board is mine so I can redesign it ). >> >>I found some optocouplers but they have only 4 channels so it would mean >>putting 8 ICs on board which doesn't seem to be a very good idea. >> >>Does anybody know any other possible way of isolating these boards? >> >> >> >>Thank you very much, >> >>Sam >> >> >> >> >> >>-- >>http://www.piclist.com PIC/SX FAQ & list archive >>View/change your membership options at >>http://mailman.mit.edu/mailman/listinfo/piclist >> > > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist