SRAM Chip Async Single 3.3V 4M-Bit 256K x 16 12ns 44-Pin TSOP-II T/R
4Mb SDR Synchronous RAM, 18b Address Bus Width, 3.3V, 170mA, TSOP
4Mb Asynchronous SRAM, 16b Word, 18b Address, 15ns Access, 3.3V 3.6V
18-bit Parallel SRAM, 4Mb, 3.3V, TSOP, 0-70°C