The 165-ball FBGA package (13x15 mm body) is surface-mount only. This part targets high-bandwidth buffering in networking equipment, test instrumentation, and telecom line cards where back-to-back read-write throughput without dead cycles is critical.
633 MHz clock — throughput and timing margin
The 633 MHz clock rate defines the peak data rate for the QDR II+ interface. Each clock edge transfers data on both rising and falling edges, so the effective I/O bandwidth is double the clock frequency.
The 165-ball FBGA (13x15 mm) is a fine-pitch BGA. It requires a multi-layer PCB with microvias or blind vias for breakout, plus X-ray inspection after reflow. The tray shipping medium means the parts arrive in antistatic trays, not tape-and-reel — factor that into pick-and-place feeder setup if you're running high-volume assembly.