MM54C989 series datasheets. Manufacturer: National Semiconductor.

MM54C989 3 V to 5.5 V, 64-bit (16 x 4) TRI-STATE RAM in 16-pin DIL package. Operational temperature range from -55°C to 125°C. Datasheet*) MM74C989 3 V to 5.5 V, 64-bit (16 x 4) TRI-STATE RAM in 16-pin DIL package. Operational temperature range from -40°C to 85°C. Datasheet*)

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