Standard SRAM, 256KX16, 15ns, CMOS, PDSO44, 0.400 INCH, LEAD FREE, SOJ-44
AS7C513B Series 512-kbit (32 K x 16) 5 V 20 ns CMOS Static RAM - TSOP 11-44

Standard SRAM, 256KX16, 20ns, CMOS, PDSO44, 0.400 INCH, LEAD FREE, SOJ-44
Standard SRAM, 128KX8, 12ns, CMOS, PDSO32, 0.300 INCH, PLASTIC, SOJ-32