Logic density and I/O budget for the BOM
The EP4CE115F23I7 packs 114480 logic elements (LEs) across 7155 LABs/CLBs, with 3981312 total RAM bits on-chip. This puts it at the high end of the Cyclone IV E family — enough fabric for a soft-core processor, a DDR controller, and several video-processing pipelines without needing external SRAM. 280 user I/O in a 484-ball BGA (23x23 mm) means the pinout can fan out a 32-bit data bus plus control signals and still leave room for a parallel flash interface. The 1.15V to 1.25V core supply is standard for the 60 nm process node; the I/O banks support multiple voltage levels, but the core rail needs a clean 1.2V regulator within ±50 mV across load steps.
The junction temperature ceiling of 100°C means the device can sit in a 85°C ambient enclosure with a moderate airflow — the thermal resistance of the 484-FBGA package (θJA around 20-25°C/W depending on board copper) must be factored into the thermal budget. At 100°C TJ, the static power (leakage) roughly doubles from the 25°C value, so the supply current at high temperature is higher than the typical number in the datasheet.
484-ball FBGA, 23x23 mm body, 1.0 mm ball pitch. The 280 I/O are distributed across eight banks — each bank has its own VCCIO supply pin, so the PCB must route separate power planes for each I/O voltage group. The tray packaging means the parts ship in anti-static trays, not tape-and-reel — plan for pick-and-place feeder changeover.