A 512 Kbit low-voltage NV-SRAM with the size of a conventional SRAM

T. Miwa, J. Yamada, H. Koike, T. Nakura, S. Kobayashi, N. Kasai, H. Toyoshima

Research output: Contribution to conferencePaperpeer-review

21 Citations (Scopus)


This paper describes two new circuit techniques for non-volatile SRAMs with back-up ferroelectric capacitors (NV-SRAMs). These circuits are able to overcome the size and low-voltage-reliability problems faced by the original NV-SRAM. A new 0.25-μm-design-rule four-metal-layer NV-SRAM cell occupies 9.7 μm2, that is the same area as a 0.25-μm three-metal-layer SRAM cell. A high-voltage/negative-voltage plate line driver allows a low-voltage-operation NV-SRAM array's improving its nonvolatile retention characteristics. A 512-Kbit-test macro has also been designed with only one percent area overhead from a conventional SRAM macro.

Original languageEnglish
Number of pages4
Publication statusPublished - 2001 Jan 1
Externally publishedYes
Event2001 VLSI Circuits Symposium - Kyoto, Japan
Duration: 2001 Jun 142001 Jun 16


Other2001 VLSI Circuits Symposium

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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