"TY-FFASI" is stamped on the boards for the original Data East (Sega) solid-state flipper system, the first solid-state flipper system in pinball.
As far as we know, it was never really used as a marketing name the way Williams used "Fliptronic". The Data East boards of that vintage all had various (and slightly silly) names, and TY-FFASI was just one of them.
Of course, fliptronic.com was taken, and I wanted a domain name...
Sorry there's not more here. Clay's guides have lots of information on the flipper system used in Data East/Sega games.