April 1990 Edition 3.0 DATA SHEET 00 FUJITSU MB81 C68A-251-301-35 CMOS 16K-BIT HIGH-SPEED SRAM 4K Words x 4 Bits Static Random Access Memory with Super High-Speed and Automatic Power Down The Fuj~su MB81C68A is a 4,096 words x 4 bits static random access memory fabricated w~h a CMOS silicon gate process. The memory uses asynchronous circu~ry. All pins are TTL compatible and a single +5 V power supply is required. A separate chip select (CS) pin simplHies multipackage systems design by perm~i.