 The size of an SRAM with "m" address lines and "n" data lines is 2"m" words, or 2"m" × "n" bits.The most common word size is 8 bits, meaning that a single byte can be read or written to each of 2"m" different words within the SRAM chip.Several common SRAM chips have 11 address lines (thus a capacity of 2"m" = 2,048 = 3d words) and an 8-bit word, so they are referred to as "2k × 8 SRAM".