The 72V253 8K x 9/4K x 18 SuperSync II FIFO memory has flexible x9/x18 bus-matching on both read and write ports. The variable clock cycle counting delay associated with the latency period found on previous SuperSync devices has been eliminated. SuperSync II FIFOs are appropriate for network, video, telecommunications, data communications, and other applications that need to buffer large amounts of data and match buses of unequal sizes.