The SN74V3680-6PEU from Texas Instruments is a unidirectional synchronous FIFO with 576K (16K x 36) capacity, rated at 166 MHz and 4.5 ns, in a 128-LQFP (20x14) package.
The SN74V3680-7PEU from Texas Instruments is a synchronous unidirectional FIFO with 576K (16K x 36) memory, 133.3 MHz operation and 5 ns speed, in a 128-LQFP (20x14) package.
The SN74V3680-15PEU from Texas Instruments is a uni-directional synchronous FIFO with 576K (16K x 36) memory at 66.7 MHz and 10 ns in a 128-LQFP (20x14) package.