72 Mbit QDR II SRAM at 333 MHz — what the clock rate buys you
The 333 MHz clock frequency delivers four data words per clock cycle. Organised as 2M x 36, the 36-bit word width maps cleanly to a 32-bit data bus with four parity or ECC check bits, saving the board from an external parity RAM or a wider-than-necessary memory bus.
165-ball FBGA — the PCB layout reality
The ball map is not symmetrical, so the fanout via pattern and decoupling capacitor placement need to be worked out before the board is laid out. For a telecom central-office or data-centre switch where ambient is controlled, this is fine. For an outdoor base-station cabinet or a factory-floor controller, it is not the right choice.
