LCSRAM: A Leakage Controlled Six-transistor Static Random Access Memory Cell with Intrinsically High Read Stability

Highly scaled processes increase leakage and transistor variations, both of which are problematic for SRAM, which is pervasive in modern CMOS integrated circuits. Here, a six transistor SRAM cell is presented that does not suffer from reduced stability when reading. The cell also resides in a low leakage, voltage collapsed, low standby power mode when not being accessed. The cell circuit topology, layout, and impact on memory design are described. Simulation of operation on 130 and 90 nm technologies and with predictive technology models for 65 and 45 nm technologies demonstrate the leakage reduction and measurement on 130 nm demonstrates improved read stability