MB81C51

February 1990 Edition 2.0 DATA SHEET cO FUJITSU MB81C51-251-30 CMOS TAG RANDOM ACCESS MEMORY CMOS Tag Random Access Memory The Fujitsu MB81 C51 is a 512 entry x4 way or 1024 entry x2 way tag random access memory (Tag RAM) fabricated with CMOS technology. The MB81 C51 is ideal for use in cache memory systems with other RAMs. This device offers the advantages of compact design and high performance in cache systems for use with 32-bit CPUs. Organization: 512 Entry x 4 way or 1024 Entry x 2 way Access time: 30 ns max from Address Inputs 18 ns max from Compare Data Inputs Power consumption: 1375 mW max. Single +5 V power supply ±1 0% tolerance TIl. compatible inputs and outputs LRU (Least Recently Used) replacement logic Purge function (All-purge and partial-purge) Internal parity generalor/checker Standard 64-pin Ceramic Pin Grid Array Package: PGA MB81C51-xxCR Absolute Maximum Ratings (See Note) Rating Supply Voltage Symbol Vex; Valu...