A fully-functional 90nm 8Mb STT MRAM demonstrator featuring trimmed, reference cell-based sensing

Spin Transfer Torque Magnetoresistive RAM (STT MRAM) has uniquely attractive write performance and endurance characteristics. Nonetheless, little STT MRAM circuit hardware data has been published [1-4]. This paper describes a fully-functional 90nm 8Mb STT MRAM, identifies and describes solutions to the primary circuit challenges, and includes considerable circuit hardware data.