A content addressable memory using magnetic domain wall motion cells

A 5-ns search operation of a spintronic content addressable memory (Spin-CAM) was demonstrated, and the speed was the fastest to date. The CAM macro, with a capacity of 16 kb, was fabricated using 90-nm CMOS and domain wall (DW) motion processes. The operating speed was comparable to that of SRAM-based CAM. We also propose a CAM which has multiple contexts by improving the CAM cell circuit to enhance the SoC´s performance. The estimated cell area is 3.5 μm², which is less than that of an SRAM-based CAM cell, when a four-context CAM is designed.