CYPRESS CY27C256-70PC 27C256 32K x 8-Bit CMOS EPROM, 70ns DIP24
When disabled (CE HIGH), the CY27C256 automatically powers down into a low-power stand-by mode. Reading the CY27C256 is accomplished by placing active LOW signals on OE and CE. ORIGINAL CYPRESS. 1 X CY27C256-70PC.