The CY7C1241V18, CY7C1256V18, CY7C1243V18, and CY7C1245V18 are 1.8V Synchronous Pipelined SRAMs, equipped with Quad Data Rate-II+ (QDR-II+) architecture. QDR-II+ architecture consists of two separate ports to access the memory array. The read port has dedicated data outputs to support read operations and the write port has dedicated data inputs to support write operations. QDR-II+ architecture has separate data inputs and data outputs to completely eliminate the need to "turn around" the data bus required with common IO devices. Each port can be accessed through a common address bus. Read and write addresses are latched on alternate rising edges of the input (K) clock. Accesses to the QDR-II+ read and write ports are completely independent of one another. To maximize data throughput, both read and write ports are equipped with Double Data Rate (DDR) interfaces. Each address location is associated with four 8-bit words (CY7C1241V18), 9-bit words (CY7C1256V18), 18-bit words (CY7C1243V18), or 36-bit words (CY7C1245V18), that burst sequentially into or out of the device. Because data can be transferred into and out of the device on every rising edge of both input clocks (K and K), memory bandwidth is maximized while simplifying system design by eliminating bus "turn-arounds".