The 72V3613 is a 64 x 36 3.3V Sync FIFO which supports clock frequencies up to 83 MHz and has read-access times as fast as 8 ns. Three modes of byte-order swapping are possible with any bus-size selection. Communication between each port can bypass the FIFO via two 36-bit mailbox registers. The continuous clocks for each port are independent of one another and can be asynchronous or coincident.