In a message dated 09/01/02 RCini(a)congressfinancial.com writes: Hi Rich I've used the MAX3000 series CPLD's, one problem I did find with these devices is that the top mosfet in the output stage is an N channel device. If you need to drive logic with CMOS input levels you could run into difficulty. Pull-up resistors may be required. I couldn't drive logic level mosfets and some Analog Devices parts with MAX3064 using 3V3 supply. The 'byteblaster' parallel port JTAG programmer can be a bit erratic. I had to decouple some of the JTAG signal lines with 47pF caps to make it work. Atmel's free software is really easy to use once you get used to it. Also, don't forget to tie un-used input pins to ground or Vcc. Because I was never happy with Atmel's MAX3000 output stage I switched over to using Xilinx Coolrunner. The Xilinx parts have a true complimentary output stage and you get proper rail to rail drive levels, they're also lower power too. On the downside, you have to buy a Xilinx JTAG programmer and their software leaves a great deal to be desired. Good luck Chris