The 72V3611 is a 64 x 36 3.3V Sync FIFO memory which supports clock frequencies up to 67MHz and has read access times as fast as 10ns. Communication between each port can take place through two 36-bit mailbox registers. Two or more devices may be used in parallel to create wider data paths. The clocks for each port are independent of one another and can be asynchronous or coincident. The enables for each port are arranged to provide a simple bidirectional interface between microprocessors and/or buses with synchronous control.