The Microchip Technology Inc. 93LC66B-E/SN is a 4Kbit low-voltage serial Electrically Erasable PROM (EEPROM). It utilizes advanced CMOS technology, making it suitable for low-power, nonvolatile memory applications. The device offers features like self-timed erase/write cycles, automatic erase all functionality, and power-on/off data protection. Available in various packages, it caters to diverse industrial and commercial applications.