SRAM Chip Async Single 5V 4M-Bit 512K x 8 20ns 44-Pin TSOP-II
Standard SRAM, 512KX8, 20ns, CMOS, PDSO44, LEAD FREE, TSOP2-44
SRAM 4M, 3.3V, 20ns, FAST 512K x 8 Asynch SRAM