Fujitsu MB81C51
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.ABSOLUTE MAXIMUM RATINGS
(See Note) Rating Supply Voltage Symbol Value Un" Vex; -0.5 to +7 V Input Vo~e on any pin with respect to ND VN --3.0 to +7 V Output VoHage on any pin with respect to GND Voor -Q.5 to +7 V Output Current lour ±20 mA Power Dissipation PD 1.5 W Temperature Under Bies TaN -10 to +85 °C Storage Tempereture Range TSTG ~!ito+125 °C Note: Permanent device damage may ocaJr Habsolulll maximum ratings are exceeded. Functional operation should be rastriclad to !he oondilions as detaIed in Ihe operation sections 01 this data sheat Exposure to absolulll maximum rating conditions lor exIIInded periods may aflect devios re.ability. PGA-64C-A02 (PIN GRID ARRAY) 4●3 MB81C51-25 'MB81C51-30 Fig. 1 - MB81C51 BLOCK DIAGRAM 1 AD 0 -●●●●●●●● I---- ADDRESS BUFFER & DECODER AS O- I i PDAARTIATY PARITY GENE- RATOR T A ~G l\r D A T A ENTRY ~ r " r' MEMORY CELL 512 ENTRY X 23 BIT X4WAY GSENSE OUT ~ I COMe.,AW' /'- ~ , I-- y- ~ I-- PURGE I-- BUFFER PU . ;.- MEMORY CELL 512 ENTRY X 6 BIT -- VCC GND A V I'r- REPLACE INFO, ,;.- J,.