EP3C16F256C7N

Updated: 2026-09-11

Overview

The EP3C16F256C7N is a member of Intel's Cyclone III FPGA family, offering a balance of cost, power efficiency, and logic density. With 16,000 logic elements (LEs) and 56 M9K memory blocks, it provides sufficient resources for medium-complexity digital designs. The device operates at a 1.2V core voltage with 256 pins in a FineLine BGA package, suitable for space-constrained applications. As part of the Cyclone III series, this FPGA is fabricated using a 65nm low-power process technology, delivering up to 75% lower power consumption compared to previous generations. The 'C7N' speed grade indicates commercial temperature range operation (0°C to 85°C), making it appropriate for most indoor electronic systems.

Structure and Working Principle

The EP3C16F256C7N consists of a configurable logic array, embedded memory blocks, phase-locked loops (PLLs), and programmable I/O elements. The logic array contains adaptive logic modules (ALMs) that can be programmed to implement combinational or sequential logic functions. Four PLLs provide clock management with multiplication, division, and phase shifting capabilities. Configuration is typically performed via JTAG interface or flash memory, loading a bitstream that defines the hardware functionality. The device supports multiple I/O standards including LVCMOS, LVTTL, and differential signaling (LVDS). Power is distributed through separate core, I/O, and PLL supply rails for optimal noise isolation.

Key Features

The EP3C16F256C7N stands out for its 56 embedded memory blocks (9 Kbits each), totaling 504 Kbits of on-chip RAM. This enables efficient implementation of buffers, FIFOs, and small processor systems. The device includes 4 general-purpose PLLs with clock synthesis capabilities from 6 MHz to 322 MHz. Notable power features include programmable power technology that allows unused logic to be powered down, reducing static current. The 256-pin FineLine BGA package offers 158 user I/O pins with programmable drive strength and slew rate control. All I/Os are arranged in banks with separate voltage supplies for mixed-voltage system integration.

Application Areas

This FPGA is commonly deployed in industrial control systems for motor control, sensor interfacing, and PLC applications. Its moderate logic capacity makes it suitable for implementing custom interfaces like UART, SPI, or I2C bridges in embedded systems. In communications, the EP3C16F256C7N is used for protocol conversion, basic signal processing, and network packet handling. Consumer electronics applications include display controllers, audio processing, and system management functions. The commercial temperature range makes it inappropriate for automotive or military applications without additional qualification.

Maintenance and Precautions

Proper handling requires ESD protection measures during installation and maintenance. The BGA package necessitates professional soldering equipment for rework—manual soldering is not recommended. Power supplies should follow the specified sequence (core voltage before I/O voltage) during startup to prevent latch-up. For long-term reliability, ensure the operating environment remains within the 0°C to 85°C range. Thermal vias and proper PCB layout are essential for heat dissipation. Configuration bitstreams should be verified against the specific device speed grade to avoid timing violations in the final application.

B2B Procurement Guide

When sourcing EP3C16F256C7N devices, verify the manufacturer's lot code for authenticity, as counterfeit FPGAs are a known industry issue. Consider purchasing through authorized Intel (Altera) distributors for guaranteed quality. Lead times may vary due to production cycles—plan procurement 8-12 weeks in advance for stable supply. Evaluate alternative Cyclone III devices (e.g., EP3C25 or EP3C40) if additional logic resources are required. For high-volume orders (1,000+ units), negotiate pricing based on annual commitment. Always request full device marking details and packaging specifications (tape-and-reel vs. tray) to match production requirements.