The S25FL128LAGMFI000 is a 128 Mb (16 MB) automotive-grade SPI NOR flash memory using 65-nm floating gate technology, supporting up to 133 MHz clock rates and operating from a 2.7 V to 3.6 V supply. It offers multi-I/O SPI (single, dual, quad, QPI), flexible erase options, and 100,000 program/erase cycles. Security features include four lockable 256-byte regions and advanced block protection, making it ideal for code storage and secure automotive applications.