Design of a soft-error tolerant 9-transistor/6-magnetic-tunnel-junction hybrid cell based nonvolatile TCAM

Naoya Onizawa, Shoun Matsunaga, Takahiro Hanyu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper introduces a soft-error tolerant ternary content-addressable memory (TCAM) cell based on a transistor/magnetic-tunnel-junction (MTJ) hybrid structure. The MTJ device stores one-bit information as a resistance value and is often used for non-volatile memories. In the proposed nine-transistor (9T)/six-MTJ (6MTJ) cell, one-bit information is redundantly represented using three MTJs to mask a one-bit error per cell that might be occurred due to particle strikes. Thanks to the stackability of the MTJ device over a CMOS layer, there is no area overhead due to the redundancy compared to a conventional 9T-2MTJ cell. A 256-word 64-bit TCAM based on the proposed cell is designed under a 90nm CMOS/MTJ process and is evaluated using HSPICE simulation. The simulation results show that the proposed TCAM properly operates under a one-bit error per cell with comparable energy, area and a 14% delay overhead compared to the conventional TCAM. Compared to a CMOS-based TCAM with an error-correction code that masks a one-bit error per word, the proposed TCAM reduces the nubmer of transistors by 81% while masking a one-bit error per cell.

Original languageEnglish
Title of host publication2014 IEEE 12th International New Circuits and Systems Conference, NEWCAS 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages193-196
Number of pages4
ISBN (Electronic)9781479948857
DOIs
Publication statusPublished - 2014 Jan 1
Event2014 12th IEEE International New Circuits and Systems Conference, NEWCAS 2014 - Trois-Rivieres, Canada
Duration: 2014 Jun 222014 Jun 25

Other

Other2014 12th IEEE International New Circuits and Systems Conference, NEWCAS 2014
CountryCanada
CityTrois-Rivieres
Period14/6/2214/6/25

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Control and Systems Engineering
  • Computer Networks and Communications
  • Software

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