MCM44256B Datasheet (Motorola) - 4MB R4000 Secondary Cache Fast Static RAM Module Set

MCM44256B, 4MB R4000 Secondary Cache Fast Static RAM Module Set

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MCM44256B/D 4MB R4000 Secondary Cache Fast Static RAM Module Set Four MCM44256B modules comprise a full 4 MB of secondary cache for the R4000 processor.

Each module contains nine MCM6729DWJ fast static RAMs for a cache data size of 256K x 36.

The tag portion, dependent on word line size, contains either two MCM6729DWJ or one MCM6726DWJ fast static RAMs.

All input signals, except A0 and WE are buffered using 74FBT2827 drivers with se

MCM44256B Features

* AM WRITE CYCLE 2 (DCS or TCS Controlled, See Notes 1 and 2)

* 12 P Parameter Address Setup Time A0 Setup Time Address Valid to End of Write A0 Valid to End of Write Data/Tag Enable to End of Write Data Valid to End of Write Data Hold Time Write Recovery Time Write Recovery Time

* A0