SPI flash memory, Serial flash memory, NOR serial memory, embedded system

 FLASH - NOR Memory IC 4Mb (512K x 8) SPI - Quad I/O 108MHz 8-USON (2x3)

https://www.futureelectronics.com/p/semiconductors--memory--flash--norflash--serial/mx25v4035fzuitr-macronix-1132015