The 93LC66C-I/P is an Electrically Erasable, Programmable Read-Only Memory part manufactured by Microchip. It has 512x8-bit (256x16-bit) of memory and operates on a 2.5V to 5.5V supply. The memory can be accessed through a Microwire interface operating at up to 3MHz. It is offered in a DIP8 package.