A methodology for robust, energy efficient design of Spin-Torque-Transfer RAM arrays at scaled technologies

Abstract

In this paper we propose a methodology for energy efficient Spin-Torque-Transfer Random Access Memory (STTRAM) array design at scaled technology nodes. We present a model to estimate and analyze the energy dissipation of an STTRAM array. The presented model shows the strong dependence of the array energy on the silicon transistor width, word line voltage and row/column organization. Using the array energy model we propose a design methodology for STTRAM arrays which minimizes the energy dissipation while maintaining the required robustness in read and write operations at scaled technologies.