論文

2021年4月

Dual-Port SOT-MRAM Achieving 90-MHz Read and 60-MHz Write Operations under Field-Assistance-Free Condition

IEEE Journal of Solid-State Circuits
  • Masanori Natsui
  • Akira Tamakoshi
  • Hiroaki Honjo
  • Toshinari Watanabe
  • Takashi Nasuno
  • Chaoliang Zhang
  • Takaho Tanigawa
  • Hirofumi Inoue
  • Masaaki Niwa
  • Toru Yoshiduka
  • Yasuo Noguchi
  • Mitsuo Yasuhira
  • Yitao Ma
  • Hui Shen
  • Shunsuke Fukami
  • Hideo Sato
  • Shoji Ikeda
  • Hideo Ohno
  • Tetsuo Endoh
  • Takahiro Hanyu
  • 全て表示

56
4
開始ページ
1116
終了ページ
1128
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1109/JSSC.2020.3039800

The development of new functional memories using emerging nonvolatile devices has been widely investigated. Spin-transfer torque magnetoresistive random access memory (STT-MRAM) has become new technology platform to overcome the issue in power consumption of logic for the application from IoT to AI; however, STT-MRAM has a tradeoff relationship between endurance, retention, and access time. This is because the MTJ device used in STT-MRAM is a two-terminal device, and excessive read current for high-speed readout can cause unexpected data writing, or so-called read disturbance. In order to meet the demand for the realization of high-speed nonvolatile memory, the development of new memories based on innovative circuit, device, and integration process is required. In this article, we demonstrate an SOT-MRAM, a nonvolatile memory using MTJ devices with spin-orbit-torque (SOT) switching that have a read-disturbance-free characteristic. The SOT-MRAM fabricated using a 55-nm CMOS process is implemented in a dual-port configuration utilizing a three-terminal structure of the device for realizing a wide bandwidth applicable to high-speed applications. In addition, a read-energy reduction technique called a self-termination scheme is also implemented. Through the measurement results of the fabricated prototype chip, we will demonstrate the proposed SOT-MRAM achieves 60-MHz write and 90-MHz read operations with 1.2-V supply voltage under a magnetic-field-free condition.

リンク情報
DOI
https://doi.org/10.1109/JSSC.2020.3039800
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85097950870&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85097950870&origin=inward
ID情報
  • DOI : 10.1109/JSSC.2020.3039800
  • ISSN : 0018-9200
  • eISSN : 1558-173X
  • SCOPUS ID : 85097950870

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