P2V28S20ATP is organized as 4-bank x 8,388,608-word x 4-bit Synchronous DRAM with LVTTL interface and P2V28S30ATP is organized as 4-bank x 4,194,304-word x 8-bit and P2V28S40ATP is organized as 4-bank x 2,097, 152-word x 16-bit.