| Autor: |
Garzón, Esteban, De Rose, Raffaele, Crupi, Felice, Trojman, Lionel, Teman, Adam, Lanuzza, Marco |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Solid-State Electronics, 2022 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1016/j.sse.2022.108315 |
| Popis: |
This paper investigates the impact of thermal stability relaxation in double-barrier magnetic tunnel junctions (DMTJs) for energy-efficient spin-transfer torque magnetic random access memories (STT-MRAMs) operating at the liquid nitrogen boiling point (77K). Our study is carried out through a macrospin-based Verilog-A compact model of DMTJ, along with a 65nm commercial process design kit (PDK) calibrated down to 77K under silicon measurements. Comprehensive bitcell-level electrical characterization is used to estimate the energy/latency per operation and leakage power at the memory architecture-level. As a main result of our analysis, we show that energy-efficient small-to-large embedded memories can be obtained by significantly relaxing the non-volatility requirement of DMTJ devices at room temperature (i.e., by reducing the cross-section area), while maintaining the typical 10-years retention time at cryogenic temperatures. This makes DMTJ-based STT-MRAM operating at 77K more energy-efficient than six-transistors static random-access memory (6T-SRAM) under both read and write accesses (-56% and -37% on average, respectively). Obtained results thus prove that DMTJ-based STT-MRAM with relaxed retention time is a promising alternative for the realization of reliable and energy-efficient embedded memories operating at cryogenic temperatures. |
| Databáze: |
arXiv |
| Externí odkaz: |
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