IS61DDPB41M18A/A1/A2 IS61DDPB451236A/A1/A2 1Mx18, .
IS61DDPB41M18A - 18Mb DDR-IIP(Burst 4) CIO SYNCHRONOUS SRAM
IS61DDPB41M18A2 - 18Mb DDR-IIP(Burst 4) CIO SYNCHRONOUS SRAM
IS61DDPB41M18A1 - 18Mb DDR-IIP(Burst 4) CIO SYNCHRONOUS SRAM