Cypress CY7C371U Info/Datasheet

There are 10s of thousands of these CPLDs on the market at reasonable prices (<$1 each) and I might like to use them to build some of my projects of expansion cards for older machines. However, I can not find a datasheet which mentions the 'U' variant of the CY7C371. I found a datasheet for the CY7C371 and CY7C371L. And Cypress only has the sheets for the newer CY7C371i version (in-system-programmable). But none of these mentions the U variant. I would hate to pick up the U variant only to discover that it is OTP or something. Anyone have info or a datasheet for the U variant? Is there a secret/obscure link on Cypress's website that leads to datasheets for obsolete parts? As far as I can tell, once it's obsolete they yank all support from their site. Sigh. I like Samsung's more enlightened approach, where datasheets for memory discontinued years ago are still available--so far. Thank you for any helpful or humorous information. Jeff Walther