Non-volatile RAM memory, mram vs sram, MRAM memory circuits, spi mram

 FM24CL64 Series 64 Kb (8 K x 8) 3 V 3 us Serial F-RAM Memory - TDFN-8

https://www.futureelectronics.com/p/semiconductors--memory--RAM--nvram--mram/fm24cl64b-dgtr-infineon-7015730