Establish Multiplexing as the Industry Standard

# Establish Multiplexed Addressing as the Industry Standard

Once both Mostek and Texas Instruments had proven that multiplexed RAS/CAS addressing solved the pin-count problem at 4K density, the rest of the DRAM industry adopted the same convention rather than inventing alternatives.

Memory controller designs, test equipment, and board layouts all converged on the RAS-then-CAS sequence as the expected way to talk to a DRAM chip, regardless of which vendor made the part.

This standardization meant the addressing scheme introduced at the 4K generation was not a one-generation stopgap. It became the baseline interface convention for essentially every DRAM generation that followed.

FROM FIX TO STANDARDOriginsolved a specific 4K pin-count problemAdoptionmatched independently by every major DRAM vendorResultRAS/CAS became the default DRAM interface convention

Diagram above: from fix to standard.

WHY STANDARDIZATION MATTEREDInteroperabilitycontrollers worked across vendors without redesignToolingshared test and board-design infrastructureDurabilitythe convention persisted well beyond this single generation

Diagram above: why standardization mattered.

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