SRAM 2.5 or 3.3V 512K x 18 9M
SRAM 1.8 or 1.5V 8M x 18 144M
SRAM 2.5 or 3.3V 256K x 36 9M
SRAM 1.8 or 1.5V 16M x 8 144M
SRAM 1.8 or 1.5V 4M x 36 144M