The XC2S400E-6FT256C is a powerful Field Programmable Gate Array from AMD’s Spartan-IIE family, delivering exceptional performance for embedded systems and digital logic applications. This 256-pin FTBGA device combines 400,000 system gates with advanced features designed for cost-effective ASIC replacement solutions.

Overview of XC2S400E-6FT256C FPGA

The XC2S400E-6FT256C represents AMD’s second-generation programmable logic technology, offering designers a flexible platform for implementing complex digital circuits. Built on 0.15-micron process technology, this FPGA delivers reliable performance across industrial temperature ranges while maintaining low power consumption.

Key Product Specifications

Technical Specifications and Features

Core Logic Resources

Input/Output and Electrical Characteristics

Advanced FPGA Architecture and Design Features

Memory Configuration Options

The XC2S400E-6FT256C offers versatile memory solutions through its hierarchical SelectRAM architecture. Designers can implement distributed RAM using 16 bits per Look-Up Table (LUT) or utilize the configurable 4K-bit true dual-port block RAM for more substantial memory requirements.

Programmability and System Integration

This Xilinx FPGA provides unlimited in-system reprogrammability, enabling field upgrades without hardware replacement. The device includes four Delay-Locked Loops (DLLs) for precise clock management and signal timing optimization.

Performance Characteristics

• Maximum Operating Frequency: 357MHz
• Process Technology: 0.15 micron CMOS
• Interconnect Design: Fast, predictable routing for consistent timing
• RoHS Compliance: Fully compliant with environmental standards

Application Areas and Use Cases

Industrial Control Systems

The XC2S400E-6FT256C excels in industrial automation applications where reliable logic processing and I/O expansion are critical. Its robust temperature range and stable performance make it ideal for factory automation controllers.

Communication Interfaces

With 182 user I/O pins and support for 19 different I/O standards, this FPGA seamlessly integrates into communication systems requiring protocol conversion, signal processing, and data routing capabilities.

Embedded System Development

The extensive logic resources and flexible RAM configuration enable complex embedded designs, including custom peripherals, state machines, and digital signal processing functions.

Cost-Effective ASIC Replacement

Organizations seeking alternatives to mask-programmed ASICs benefit from the XC2S400E’s programmability, eliminating lengthy development cycles and high initial costs while maintaining design flexibility.

Design and Development Support

Software Tools Compatibility

The XC2S400E-6FT256C is supported by AMD’s comprehensive development tools, including ISE Design Suite for synthesis, implementation, and programming. Engineers can leverage these industry-standard tools for efficient FPGA development workflows.

Package and Mounting Information

Product Status and Availability

Important Note: The XC2S400E-6FT256C is currently classified as obsolete by the manufacturer. While existing stock may be available through authorized distributors and component suppliers, AMD does not recommend this device for new designs. Engineers developing new projects should consider current-generation FPGA families for optimal support and longevity.

Alternative and Replacement Options

For new designs requiring similar functionality, consider evaluating newer FPGA families that offer enhanced performance, lower power consumption, and extended manufacturer support.

Quality and Compliance Standards

The XC2S400E-6FT256C meets stringent quality standards:

• RoHS Compliant: Meets environmental regulations
• Radiation Hardening: Standard commercial grade (not radiation-hardened)
• Quality Assurance: Manufactured under ISO quality management systems
• ESD Protection: Designed with electrostatic discharge protection

Comparison Table: Key Competitive Advantages

Ordering and Part Number Information

Complete Part Number Breakdown

XC2S400E-6FT256C decodes as follows:

• XC2S = Spartan-IIE family identifier
• 400E = 400,000 gate device, enhanced version
• -6 = Speed grade
• FT256 = Fine-pitch BGA, 256 pins
• C = Commercial temperature grade (0°C to 85°C)

Package Variants

While the XC2S400E is available in multiple package options, the FT256 variant offers an optimal balance of I/O count and board space utilization for medium-density applications.

Frequently Asked Questions

What makes the XC2S400E-6FT256C suitable for ASIC replacement?

This FPGA provides the logic density and I/O capabilities needed for ASIC alternatives while offering the flexibility of reprogrammable logic, eliminating ASIC development costs and time-to-market delays.

Can the XC2S400E-6FT256C operate at different voltage levels?

The device is designed for 1.8V core operation with a tolerance range of 1.71V to 1.89V. I/O banks can support various voltage standards based on system requirements.

What development boards support the XC2S400E-6FT256C?

While specific development boards for the XC2S400E may be limited due to its obsolete status, compatible Spartan-IIE evaluation platforms can be used for prototyping and testing.

How does the speed grade affect performance?

The -6 speed grade indicates the device’s timing characteristics, with faster grades supporting higher operating frequencies. The -6 grade offers balanced performance suitable for most applications.

Summary: Why Choose XC2S400E-6FT256C

The XC2S400E-6FT256C delivers proven FPGA technology for applications requiring substantial logic resources, flexible I/O options, and reliable performance. While designated as obsolete for new designs, existing deployments benefit from its robust architecture, comprehensive feature set, and cost-effective programmable logic capabilities.

For engineers maintaining legacy systems or working with proven designs, the XC2S400E-6FT256C continues to provide dependable performance backed by extensive documentation and application knowledge within the engineering community.