This document introduces the 93AA46A/B/C, 93LC46A/B/C, 93C46A/B/C series products from Microchip Technology Inc. These products use low-power CMOS technology and have features such as self-timed erase/write cycles, automatic erase before write, power-on/off data protection circuitry, and industry standard 3-wire serial I/O interface. The products include versions with 128 x 8-bit organization, 64 x 16-bit organization, and word-selectable versions that depend on external logic levels for word size setting. They are ideal for low-power, nonvolatile memory applications.