M27128A - NMOS 128K UV EPROM
The M27128A is a 131,072 bit UV erasable and electrically programmable memory EPROM.
It is organized as 16,384 words by 8 bits.
The M27128A is housed in a 28 Pin Window Ceramic Frit-Seal Dual-in-Line package.
The transparent lid allows the user to expose the chip to ultraviolet light to erase the bi