A 288K CMOS EPROM with redundancy

A 150 ns 288K CMOS EPROM with a nine-block cell array and a standby current of less than 1 /spl mu/A has been developed. This device can be used as an 8 or 9-bit EPROM. The ninth block can be used as a redundant block by electrically programmable polysilicon fuses. A redundant row decoder is also included. Improvements in the lithography and process technologies have reduced the cell size to 9 /spl times/ 6 /spl mu/m and the chip size to 7.44 /spl times/ 4.65 mm.