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MOTOROLA
• SEMICONDUCTOR
TECHNICAL DATA
4MB R4000 Secondary Cache Fast Static RAM Module Set
Four MCM44256 modules comprise a full 4 MB of secondary cache for the R4000 processor. Each module contains nine MCM6729WJ fast static RAMs for a cache data size of 256K x 36. The tag portion, dependent on word line size, contains either two MCM6729WJ or one MCM6726WJ fast static RAMs. All input signals, except AO and WE are buffered using 74FBT2827 drivers with series 25 Q resistors.
The MCM6729WJ and MCM6726WJ are fabricated using high-performance silicon-gate BiCMOS technology. Static design eliminates the need for internal clocks or timing strobes.
All 4MB R4000 supported secondary cache options are available.
MCM44256 Datasheet
