Serial Memory Keys by Datakey (ATEK Access Technologies LLC) are rugged, portable memory devices designed for embedded systems in demanding environments. They utilize industry-standard serial EEPROM and serial NOR flash memory, offering capacities from 1 Kbit to 64 Mbit. These devices feature various form factors including key-shaped designs, SlimLine Token, and the Bar series, with interfaces such as SPI, I2C, and Microwire. The products are built for durability and long-term availability, making them suitable for industrial, medical, military, and commercial applications. The keys feature ultra-rugged construction with solid over-molded durable composite, making them resistant to liquids and physical damage.