NM27C040 4,194,304-Bit (512K x 8) High Performance.
Fairchild
NM27C040 - 4 /194 /304-Bit (512K x 8) High Performance CMOS EPROM
NM27C040 4,194,304-Bit (512K x 8) High Performance CMOS EPROM February 1999 NM27C040 4,194,304-Bit (512K x 8) High Performance CMOS EPROM General De.