On Wed, 2006-09-20 at 22:13 -0400, Bob J. wrote: > I've been considering going with a PIC24H on my next project (need many > analog inputs...the PIC24HJ128GP510 has 32 12-bit > ADC's), > and as I was trying to find some parts to sample I found that the PIC24's > aren't available as 5V parts. What's up with that? That is going to be a > problem with some of the devices I plan on using with the PIC24, notably > some 5V SPI devices and an LCD. > > Why would Microchip not produce 5V versions of these devices? Probably because the process they are using to fab the PIC24HJs isn't well suited for running at 5V. Also, running at lower voltages allows features to be smaller, meaning a smaller die, meaning cheaper to fab Just a guess on my part. > In > applications where low power consumption is not a requirement I can't see > why one would want to migrate their designs to 3V unless I'm missing > something. I think the term "migrate to 3V" is a little off. Most of my newest designs ARE 3.3V, there was no "migration". Heck, some of my designs even run at lower voltages. A recent board I worked on has a selection of either 3.3V or 2.5V for the IO drivers. Most parts these days are 3.3V based. Many are 5V tolerant, but in the core they mostly run 3.3V. Just look at the ENC28J60 from MChip. It's a 3.3V part. They just made it 5V tolerant on the few IO that might see 5V. 5V in many ways is dead IMHO. I'm surprised it hung around as long as it did. TTYL -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist