374 I/O — what the ball count buys you
The 374 I/O on a 780-ball BGA means roughly half the balls are signal, the rest power and ground. That ratio gives you room for a wide parallel bus without starving the core of clean supply rails. The 29x29 mm body fits standard PCB fabrication tolerances.
The Cyclone IV E family shares a common tool chain and pinout with higher-density siblings, so a future move to a larger device (same package family) keeps the board layout intact.
