A Sextuple Cross-Coupled SRAM Cell Protected against Double-Node Upsets

Abstract

In this paper, we propose a sextuple cross-coupled SRAM cell, namely SCCS18T, protected against double-node upsets. Since the proposed SCCS18T cell forms a large feedback loop for value retention and error interception, the cell can provide self-recoverability from any single-node upsets (SNUs) and partial double-node upsets (DNUs). Moreover, the proposed cell has optimized operation speed due to the use of six access transistors. Simulation results show that the SCCS18T cell can save approximately 65% read access time at the cost of 49% power dissipation and 50% silicon area on average, compared with typical hardened SRAM cells.