MRAM for data that needs to persist.

SPI devices use a small pin count for frequent writes without a flash erase cycle. MR10Q010 provides a 1 Mb Quad SPI option with separate 3.3 V core and 1.8 V I/O supplies. Check the command set and power sequencing when replacing another serial memory.

For controllers designed around asynchronous SRAM timing, parallel Toggle MRAM adds data persistence without battery backup. Address mapping, package pinout, bus width and read/write timing still need to match. MR5A16A automotive options use a 45 ns cycle; other listed production options use 35 ns.

Quad xSPI devices support clocks up to 133 MHz. Low-power SC variants use up to 108 MHz in STR and 54 MHz in DTR, with a different write-endurance rating. Select the exact temperature grade and package before comparing performance.

Octal xSPI supports up to 400 MB/s transfers in double-transfer-rate operation. That bus maximum depends on the selected device, controller, command overhead and timing. It is distinct from the Quad xSPI performance limit.

EMD4E001G AS2 operates at a 667 MHz clock with 1.2 V VDD/VDDQ and a 2.5 V VPP rail. Its specified retention is three months at 70 °C and cycle endurance is 10 billion. These limits differ from Toggle and xSPI MRAM; verify the controller and persistence requirements together.