Smaller MACH CPLDs, but all of them are in QFP packages, and many of The related process is being closed, I think they will produce a last Need to order /now/ to really get the parts. Since these have been so widely used, they have promised shipment up to 2014 - but you In 2011, Tilmann Rey told me: " Lattice has just discontinued all GALs. Details on how they work are not discussed on this Web page. This Web page discusses resources for reading and programming them. There's old-stock from surplus IC sellers and arcade game parts resellers. Major digital parts distributors like Digikey and Jameco stocked such parts at least to 2015. The "GAL" devices are modern equivalents, easier to find and sometimes easier to program, some are reprogrammable. Later PALs were programmed like UV-erasable PROMs but are usually not reprogrammable. The devices themselves are bits of logic with fusable links programming them consists of burning up appropriate fuses. They were used Tilmann Rei's GIDE IDE interface (16V8, 20V8) in Compupro S-100 boards and in other microcomputers and minicomputers. PALs and GALs in DIP packages with 16, 18, 20 pins were used in the mid-1970's, 80's and 90's to replace simple random logic.
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