MX25U25645GZ4I00

• Macronix Serial NOR flash, 256Mb (32MB) Density
• 32M X 8 organization, 8-Bit Data Width
• SPI Serial Interface
• 8-Pin WSON Package
• RoHS Compliant
• NOR Architecture Supports Execute-in-Place and Byte-Level Random Reads

The MX25U25645GZ4I00 is a Macronix serial NOR flash memory offering 256Mb of density, equivalent to 32MB, organized as 32M x 8. It uses an SPI interface and is supplied in an 8-pin WSON package. The device is listed as RoHS compliant. NOR flash supports random read access at the byte level, which is what allows a processor to execute code directly from the MX25U25645GZ4I00 rather than copying it to RAM first.

Serial NOR flash of this density is used for boot code, firmware images, FPGA configuration bitstreams, and read-mostly data such as fonts, graphics assets and parameter tables. The SPI interface keeps the pin count low, so the MX25U25645GZ4I00 fits designs where a parallel memory bus would be unaffordable in board area or package pins. At 32MB it is large enough to hold a compressed Linux image or a full RTOS application plus an over-the-air update slot. Typical systems are networking and IoT devices, industrial controllers, automotive body and infotainment modules, set-top boxes, printers, and instrumentation. Buyers are embedded design teams and contract manufacturers, with Macronix frequently specified where long product lifecycle support is a requirement.