SRAM 2.5 or 3.3V 256K x 72 18M
SRAM 2.5 or 3.3V 512K x 72 36M
SRAM 1.8/2.5V 256K x 72 18M
SRAM 1.8/2.5V 1M x 72 72M
SRAM 1.8/2.5V 512K x 72 36M
