MB81C51
MB81C51 is CMOS TAG RANDOM ACCESS MEMORY manufactured by Fujitsu Semiconductor Limited.
February 1990 Edition 2.0
DATA SHEET c O
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 pact 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 pare Data Inputs
- Power consumption: 1375 m W max.
- Single +5 V power supply ±1 0% tolerance
- TIl. patible 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-xx CR
Absolute Maximum Ratings (See Note)
Rating Supply Voltage
Symbol
Value
Un"
Vex;
-0.5 to +7
Input Vo~e on any pin with respect to ND
--3.0 to +7
Output Vo Hage on any pin with respect to GND
Voor
-Q.5 to +7
Output Current lour
±20 m A
Power Dissipation
Temperature Under Bies
Ta...
