The WS27C256L is a performance oriented 256K UV Erasable Electrically Programmable Read Only Memory organized as 32K words x 8 bits/word. It is manufactured using an advanced CMOS technology which enables it to operate at speeds up to 120 nsecs. The memory was designed utilizing WSI's patented self-aligned split gate EPROM cell, resulting in a low power device with a very cost effective die size.