What the 10M40DAF484C8G is and where it fits
40K logic elements — what that buys you
40K logic elements and 360 I/O are available on this device. The 10M40DAF256C7G shares the same logic and RAM but offers 178 I/O in a smaller package.
360 I/O — the routing constraint
All 360 I/O are available on the 484-FBGA package. That is the maximum I/O count for the 40K LE die — you are not leaving unused pads on the floor. If the design needs fewer pins, the 10M40DAF256C7G (178 I/O) saves board area and BGA routing complexity. If you need more than 360 I/O at 40K LE, the 10M40DAF672C8G offers 500 I/O in a 672-ball package, but that part shares the same logic capacity — the extra pins are for fan-out, not more logic.
Supply and temperature range
Core supply is 1.15 V to 1.25 V. Operating temperature is 0°C to 85°C, suitable for indoor equipment.
