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SN7489 64-BIT RANDOM-ACCESS READ/WRITE MEMORY

SN7489 Description

SN7489 64-BIT RANDOM-ACCESS READ/WRITE MEMORY * For Application as a"Scratch Pad" Memory with Nondestructive Read-Out * Fully Decoded.
This 64-bit active-element memory is a monolithic, high-speed, transistor-transistor logic (TTL) array of 64 flip-flop memory cells organized in a mat.

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Texas Instruments SN7489-like datasheet