I need an FPGA chip which fulfills the following constraints:
-- it has at least 64 IO lines;
-- it is not very fast, 133MHz is the highest possible internal frequency;
-- it contains about 500--1000 LE;
-- very important: it can directly communicate with 5V TTL devices, this means that its inputs are 5V-tolerant, or better: its V_io = 5V;
-- the software can be easily obtained and is cheap or even free, so perhaps only Altera and Xilinx should be considered as possible vendors;
-- it is relatively cheap;
-- built-in configuration memory would be a great feature (because of piracy).
What would you recommend me?
Best regards Piotr Wyderski