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Design of a Sextuple Cross-Coupled SRAM Cell with Optimized Access Operations for Highly Reliable Terrestrial Applications

Aibin Yan 1 Zhen Wu 1 Jun Zhou 1 Yuanjie Hu 1 Yan Chen 1 Zuobin Ying 1 Xiaoqing Wen 2 Patrick Girard 3
3 TEST - TEST
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
Abstract : The Aggressive technology scaling makes modern advanced SRAMs more and more sensitive to soft errors that include single-node upsets (SNUs) and double-node upsets (DNUs). This paper presents a novel Sextuple Cross-Coupled SRAM cell, namely SCCS cell, which can tolerate both SNUs and DNUs. The cell mainly consists of six cross-coupled input-split inverters, constructing a large error-interceptive 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 self-recover from all possible SNU; (2) the cell can self-recover from partial DNUs; (3) the cell can avoid the occurrence of other DNUs due to node-separation. Simulation results validate the excellent robustness of the proposed cell. Moreover, compared with the state-of-the-art 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.
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https://hal-lirmm.ccsd.cnrs.fr/lirmm-03033332
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Submitted on : Tuesday, December 1, 2020 - 12:21:18 PM
Last modification on : Wednesday, December 2, 2020 - 3:28:41 AM
Long-term archiving on: : Tuesday, March 2, 2021 - 7:03:00 PM

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Aibin Yan, Zhen Wu, Jun Zhou, Yuanjie Hu, Yan Chen, et al.. Design of a Sextuple Cross-Coupled SRAM Cell with Optimized Access Operations for Highly Reliable Terrestrial Applications. IEEE 28th Asian Test Symposium (ATS), Dec 2019, Kolkata, India. pp.55-60, ⟨10.1109/ATS47505.2019.00006⟩. ⟨lirmm-03033332⟩

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