EP3C40F780I8N
EP3C40F780I8N - Cyclone III FPGA, 39.6K LE, 780-BGA | Intel
The Intel EP3C40F780I8N is a member of the Cyclone III family of high-volume, low-cost, low-power Field Programmable Gate Arrays (FPGAs), featuring 39,600 logic elements organized into 2,475 Logic Array Blocks (LABs/CLBs), 1,161,216 bits of embedded memory, and 126 multipliers, housed in a 780-ball FBGA package with industrial temperature grade. The device operates from a nominal 1.2 V core supply (range 1.15 V to 1.25 V) and supports up to 4 PLLs with 4 dedicated clock pins per bank for flexible clock tree synthesis across up to 20 I/O banks.
An FPGA (Field Programmable Gate Array) is a programmable logic device that lets designers configure arbitrary digital logic through SRAM-based configuration cells. FPGAs sit at the intersection of ASIC efficiency and processor flexibility: they offer hardware parallelism and deterministic timing that microcontrollers cannot match, while allowing in-system reconfiguration that fixed-function ASICs cannot deliver. The Cyclone III family specifically targets cost-sensitive, power-constrained high-volume applications where designers need ASIC-class logic density without ASIC NRE cost, making it a workhorse for industrial control, video, and communications infrastructure.
Key features of the EP3C40F780I8N include 39,600 logic elements, 1,161,216 bits of embedded SRAM (approximately 135 KBytes), 4 PLLs, 20 global clock networks, 535 user I/O pins, and support for external memory interfaces including DDR/DDR2 SDRAM and QDRII SRAM. The 780-BGA package provides generous I/O count for high-pin-count parallel interfaces such as parallel video, RGMII, or PCI/PCI-X bus bridging, and the industrial temperature range (-40 °C to 100 °C) suits outdoor, factory-floor, and automotive-cabin deployments.
The EP3C40F780I8N is fabricated in TSMC's low-power 65 nm process, which is the foundation of the Cyclone III family's industry-leading static power profile (typically under 100 mW quiescent). The device supports configuration via passive serial, active serial (EPCS), JTAG, and Fast Passive Parallel modes, enabling flexible boot from low-cost EPCS flash or microprocessor host. On-chip termination (OCT) calibration and LVDS signaling up to 875 Mbps simplify board design.
Typical applications include industrial motor control and PLCs, broadcast video processing (HD-SDI/SDI bridges, LCD/TFT controllers), wireline telecom line cards, military/aerospace avionics, medical imaging pre-processing, and software-defined radio baseband. The combination of high logic density and large embedded memory makes it well suited for buffering full HD frames in video pipelines and for protocol adaptation in telecom backplanes.
When designing with the EP3C40F780I8N, allocate configuration pins (nCONFIG, nSTATUS, CONF_DONE, MSEL) carefully and follow the Cyclone III pin connection guidelines for unused pins and bank VCCIO selection. Quartus II Web Edition (free) supports the full Cyclone III device family, but designers targeting high-utilization designs with timing closure benefit from the subscription edition's TimeQuest and Chip Planner. The 780-BGA's 1.0 mm ball pitch requires 4-layer minimum PCB stack-up with microvia-in-pad at HDI processes.
This page synthesizes distributor pricing, real-time stock signals, drop-in alternatives from the same Cyclone III family, and practical board-level design notes not found in any single manufacturer datasheet.
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