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A detailed description of both a clocked and a nonclocked n-channel MOS 4K static RAM is presented. The clocked device is a three-supply (+12 V, +5 V, -5 V) RAM which uses bootstrapping circuitry for signal driving, and sustaining resistors for low memory array power dissipation and infinite chip select length. The nonclocked device is a single supply (+5 V) fully TTL compatible RAM with depletion load circuitry for speed and compactness. Emphasis is given to processing parameters and performances as well as circuit design considerations including internal signal timings and circuit schematics.
Date of Publication: Oct 1977