MRAM MEMORY WITH OTP CELLS

A magnetoresistive random access memory (MRAM) includes an MRAM array having MRAM cells, each including a Magnetic Tunnel Junction (MTJ). The MRAM includes data write circuitry configured to write in one-time-programmable (OTP) write mode or in a non-OTP write mode. In the OTP write mode, the data w...

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Bibliographische Detailangaben
Hauptverfasser: Roy, Anirban, Mahatme, Nihaar N
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:A magnetoresistive random access memory (MRAM) includes an MRAM array having MRAM cells, each including a Magnetic Tunnel Junction (MTJ). The MRAM includes data write circuitry configured to write in one-time-programmable (OTP) write mode or in a non-OTP write mode. In the OTP write mode, the data write circuitry is configured to provide a high write voltage magnitude across selected MRAM cells of a first plurality of MRAM cells so as to permanently blow the corresponding tunnel dielectric layers of the selected MRAM cells. In the non-OTP write mode, the data write circuitry is configured to provide a lower write voltage magnitude across selected MRAM cells so as to set a magnetization of the corresponding free layer of each MRAM cell to modulate a resistance of each MRAM cell, without blowing the corresponding tunnel dielectric layer of each MRAM cell.