View ma9264 datasheet:

MARCH 1995 MA9264 ADVANCE DATA DS3692-5.1 MA9264 RADIATION HARD 8192 x 8 BIT STATIC RAM The MA9264 64k Static RAM is configured as 8192x8 bits and FEATURES manufactured using CMOS-SOS high performance, radiation hard, 1.5µm CMOS-SOS Technology 1.5µm technology. The design uses a 6 transistor cell and has full static operation with Latch-up Free no clock or timing strobe required. Address input buffers are deselected Fast Access Time 70ns Typical when chip select is in the HIGH state. Total Dose 106 Rad(Si) See Application Note “Overview of the GPS Radiation Hard 1.5µm Transient Upset >1011 Rad(Si)/sec CMOS/SOS SRAM Range”. SEU 4.3 x 10-11 Errors/bitday Single 5V Supply Operation Mode CS CE OE WE I/O Power Three State Output Read L H L H D OUT Low Standby Curre