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EP3C40F780C6N – Altera Cyclone III FPGA

The EP3C40F780C6N is a low-to-medium-density FPGA from Altera (now Intel), part of the popular Cyclone III series. Built on a 90nm low-power process, it delivers an excellent balance of cost-effectiveness, low power consumption, and solid hardware resources. It is widely used in industrial control, communications, medical electronics, consumer electronics, and other mid-to-low-speed digital logic applications.

1. Basic Information

• Part Number: EP3C40F780C6N
• Manufacturer: Altera (acquired by Intel)
• Series: Cyclone III – Mainstream low-cost FPGA family
• Package: FBGA-780 (29×29mm, 1.75mm thick) with 780 solder balls
• Temperature Grade: C6 (Commercial) – 0°C to +85°C
• Environmental Spec: Lead-free (RoHS compliant)

2. Core Specifications

Logic Resources

– Logic Elements (LE): 39,600 (~40K) – Logic Array Blocks (LAB): 2,475 – Equivalent Gates: ~2 million (typical design density)

Memory Resources

– Embedded RAM: 1,161,216 bits (~1.16 Mbit) – Configurable as Block RAM, Distributed RAM, FIFO, or ROM

I/O Resources

– User I/O Pins: 535 – Supported I/O Standards: LVCMOS, LVDS, SSTL, HSTL, and more – Configurable I/O Voltages: 1.5V, 1.8V, 2.5V, 3.3V

Clock & DSP

– Max System Clock: 315–472.5 MHz (design-dependent) – PLLs: 4 integrated PLLs for multi-clock domain and phase adjustment – DSP Blocks: 120 dedicated blocks – ideal for filters, FFTs, and multipliers

Power Supply

– Core Voltage: 1.2V (1.15–1.25V) – I/O Banks: Independent voltages configurable from 1.5V to 3.3V

3. Part Number Decoding

• EP3C – Cyclone III Series
• 40 – ~40K Logic Elements
• F780 – FBGA package, 780 balls
• C6 – Commercial grade, speed grade 6
• N – Lead-free package

4. Key Features

• 90nm low-power process – Low static and dynamic power, ideal for battery-powered or heat-sensitive devices
• Balanced resources – 40K LE + 1.16Mbit RAM + 120 DSP blocks, perfect for mid-complexity control and signal processing
• Flexible I/O – Supports multiple voltage levels and differential signals for easy peripheral integration and high-speed interface design
• Cost-effective – Competitive pricing in the Cyclone III family, suitable for high-volume production
• Software support – Fully compatible with Quartus II; supports Nios II soft-core processor for embedded system development

5. Typical Applications

• Industrial Control: PLCs, motion control, multi-protocol conversion (Modbus, EtherCAT)
• Communications: Low-speed interfaces in routers/switches, IP cameras, optical transceivers
• Medical Electronics: Portable diagnostics, patient monitor data processing, display drivers
• Consumer Electronics: Smart home controllers, image preprocessing, audio control units
• Test & Measurement: Data acquisition cards, logic analyzers, signal generator controllers

6. Compatible & Alternative Models

• Same Series (Cyclone III):

  • EP3C25F780C6N (25K LE)
  • EP3C55F780C6N (55K LE)

• Upgrade Path (Cyclone IV E):

  • EP4CE40F23C6N – Lower power consumption and higher frequency

• Cross-Brand Alternative (Xilinx):

  • Spartan-6 XC6SLX45-FGG484

Let me know if you’d like a shorter version for a datasheet summary, a product page, or a sales pitch.

EP3C40F780C6N Application Scenarios

• Industrial Control Systems: Used in PLCs, motor control, and automation due to its logic density and I/O count.
• Communications: Suitable for protocol bridging, packet processing, and interface adaptation in networking equipment.
• Video and Image Processing: Applied in frame buffers, image scaling, and real-time video interfaces for embedded vision systems.
• Medical Electronics: Employed in diagnostic imaging, patient monitoring, and data acquisition hardware.
• Automotive: Utilized in infotainment, driver assistance modules, and in-vehicle networking for prototyping and low-volume production.
• Test and Measurement: Acts as a controller for data-logging instruments, signal generators, and custom test fixtures.
• Consumer Electronics: Powers display interfaces, audio processing, and custom logic in high-end consumer devices.

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