On Fri, Jun 10, 2011 at 4:54 AM, Herbert Graf wrote: > I'd say the days of 5V are certainly mostly by us. Most components are > 3.3V at most these days. > > I haven't designed for 5V in quite a while now. It depends on the industry. In a slow moving industry like ours (Industry Automation), product life cycle is quite long, typically at least 10 years and can be 15 years or 20 years or more. So we still have a lot of 5V design and I can see there will still be the case 10 years later. In fact, all our product are still using 5V backplanes now. Many of the 5V parts are gone (say FPGA) so we will have to do some redesigns along the way but that is the way it is here --- you need to deal with component obsolescence issues constantly. On the other hand, there are still many 5V parts available, including MCUs and ASICs. And level shifters can be used. And for analog parts, many of the OPAMP parts used here are actually 36V parts. :-) --=20 Xiaofan --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .