Design of a Sextuple CrossCoupled SRAM Cell with Optimized Access Operations for Highly Reliable Terrestrial Applications The Aggressive technology scaling makes modern advanced SRAMs more and more sensitive to soft errors that include singlenode upsets (SNUs) and doublenode upsets (DNUs). This paper presents a novel Sextuple CrossCoupled SRAM cell, namely SCCS cell, which can tolerate both SNUs and DNUs. The cell mainly consists of six crosscoupled inputsplit inverters, constructing a large errorinterceptive feedback loop to robustly retain stored values. Since the cell has many redundant storage nodes, the cell achieves the following robustness: (1) the cell can selfrecover from all possible SNU; (2) the cell can selfrecover from partial DNUs; (3) the cell can avoid the occurrence of other DNUs due to nodeseparation. Simulation results validate the excellent robustness of the proposed cell. Moreover, compared with the stateoftheart typical existing hardened cells, the proposed cell achieves an approximate 61% read access time as well as 12% write access time reduction at the costs of 47% power dissipation as well as 44% silicon area on average.

Novel Radiation Hardened Latch Design with CostEffectiveness for SafetyCritical Terrestrial Applications To meet the requirements of both costeffectiveness and high reliability for safetycritical terrestrial applications, this paper proposes a novel radiation hardened latch design, namely HLCRT. The HLCRT latch mainly consists of a singlenodeupset selfrecoverable cell, a 3input Celement, and an inverter. If any two inputs of the Celement suffer from a doublenodeupset (DNU), or if one node inside the cell together with another node outside the cell suffer from a DNU, the latch still has correct values on its output node, i.e., the latch is effectively DNU hardened. Simulation results demonstrate the DNU tolerance of the proposed latch. Moreover, due to the use of fewer transistors, clock gating technologies, and a highspeed path, the proposed latch saves about 444.80% delay, 150.50% power, 72.66% area, and 2029.63% delaypowerarea product on average, compared with stateoftheart DNU hardened latch designs.