1. Product Specifications
Core Architecture
- Device Family: Xilinx Spartan-IIE 1.8V FPGA
- Part Number: XC2S50E-6FT256I
- System Gates: 50,000 gates
- Logic Cells: 1,728 cells
- Technology Node: 0.15-micron CMOS process
- Supply Voltage: 1.8V core voltage
- Maximum Operating Frequency: 357MHz
Memory Architecture
- Block RAM: Up to 288K bits configurable
- Distributed RAM: Up to 221,184 bits (16 bits/LUT)
- Integrated RAM Size: 4kB
- Configurable Logic Blocks (CLBs): 384 CLBs
- SelectRAM: Hierarchical memory structure with true dual-port capability
Input/Output Specifications
- Total I/O Pins: 182 user I/O
- Package Type: 256-pin Fine-pitch Ball Grid Array (FTBGA)
- Package Dimensions: 17mm x 17mm
- I/O Standards: 19 selectable standards supported
- Delay-Locked Loops (DLLs): 4 integrated DLLs for precise timing
Performance Characteristics
- Speed Grade: -6 (fastest available for this device)
- Operating Frequency: Up to 357MHz
- Propagation Delay: Optimized for high-speed applications
- Power Consumption: Low-power 1.8V operation reduces system power requirements
2. Pricing Information
Current Market Status: The XC2S50E-6FT256I is classified as obsolete by Xilinx (now AMD) and is no longer in active production. Pricing varies significantly based on availability and supplier:
Typical Price Ranges
- New/Unused Stock: $15-$95 per unit (limited availability)
- Reclaimed/Tested: $8-$25 per unit
- Volume Pricing: Contact authorized distributors for quantities >100 units
- Lead Time: 2-12 weeks depending on supplier and quantity
Authorized Distributors
- Mouser Electronics (limited stock)
- DigiKey (obsolete – check for alternatives)
- FPGAkey (specializes in legacy FPGA components)
- Utmel Electronic
- Various franchise distributors and surplus suppliers
Note: Due to obsolete status, prices fluctuate based on remaining inventory. Consider purchasing sufficient quantities for long-term projects or evaluate modern replacement options.
3. Documents & Media
Technical Documentation
- Official Datasheet: Xilinx DS077 – Spartan-IIE FPGA Family Data Sheet
- User Guide: Spartan-IIE FPGA Complete Data Sheet and User Guide
- Application Notes:
- XAPP151: Virtex Series Configuration Architecture User Guide
- XAPP138: Spartan-IIE FPGA Applications
- Package Information: 256-pin FTBGA mechanical drawings and specifications
Design Resources
- Pin-out Diagrams: Complete pin assignments and ball map
- Reference Designs: Example implementations and starter projects
- Timing Models: IBIS and timing analysis models
- Footprint Files: PCB layout footprints for major CAD tools
Software Tools
- Xilinx ISE Design Suite: Legacy development environment (version 14.7 final)
- Programming Tools: iMPACT for device configuration
- Simulation: ModelSim compatibility for functional verification
- Synthesis: XST (Xilinx Synthesis Tool) support
4. Related Resources
Replacement and Alternative Components
Direct Functional Replacements:
- XC2S50E-6FTG256I: Alternative package option (same functionality)
- XC2S50E-7FT256I: Speed grade -7 variant (slightly slower)
Modern Alternatives:
- XC7A25T-2FTG256I: Artix-7 FPGA with enhanced performance
- XC3S50A-4TQG144C: Spartan-3A family alternative
- Lattice ICE40HX4K: Low-power alternative for simpler applications
Development Tools and Accessories
- Evaluation Boards: Spartan-IIE starter kits (discontinued – check secondary market)
- Programming Cables: Platform Cable USB or Parallel Cable III
- Development Software: Xilinx ISE WebPACK (free version available)
Application Areas
- Industrial Control Systems: Motor control and process automation
- Communications: Protocol processing and interface bridging
- Automotive Electronics: Legacy automotive systems and retrofits
- Test and Measurement: Signal processing and data acquisition
- Prototype Development: Rapid prototyping of digital circuits
Technical Support Resources
- Xilinx Answer Database: Legacy support articles and solutions
- Community Forums: EDN Network and EEVblog FPGA discussions
- Third-party Support: Specialized consultants for legacy Xilinx designs
5. Environmental & Export Classifications
Environmental Compliance
- RoHS Status: RoHS Compliant (Lead-free)
- REACH Compliance: Compliant with EU REACH regulation
- Conflict Minerals: Compliant with Dodd-Frank Act Section 1502
- WEEE Directive: Compliant with waste electrical equipment regulations
Operating Conditions
- Operating Temperature Range: -40ยฐC to +100ยฐC (Junction Temperature)
- Storage Temperature: -65ยฐC to +150ยฐC
- Humidity: 5% to 95% non-condensing
- Altitude: Up to 2,000 meters operational
- Moisture Sensitivity Level (MSL): Level 3 (168 hours at 30ยฐC/60% RH)
Quality and Reliability
- Package Qualification: JEDEC standards compliant
- Reliability Testing: Extensive qualification per JESD47 requirements
- Quality Grade: Industrial standard
- Expected Service Life: >20 years under normal operating conditions
Export Control Classification
- ECCN Code: EAR99 (Export Administration Regulations)
- HTS Code: 8542.31.0001 (Harmonized Tariff Schedule)
- Country of Origin: Various (check specific lot markings)
- Export License: Generally no license required for most destinations
- Dual-Use Technology: Not classified as sensitive dual-use technology
Environmental Certifications
- ISO 14001: Manufactured in ISO 14001 certified facilities
- OHSAS 18001: Occupational health and safety standards compliance
- Green Packaging: Recyclable packaging materials used
Summary
The XC2S50E-6FT256I represents proven FPGA technology from Xilinx’s successful Spartan-IIE family. While now obsolete, this device continues to serve critical roles in legacy system maintenance and cost-sensitive applications. Its combination of 50K system gates, 357MHz performance, and 1.8V low-power operation made it a popular choice for embedded applications.
For new designs, consider modern alternatives that offer enhanced performance, lower power consumption, and active vendor support. However, for existing applications requiring the XC2S50E-6FT256I, ensure adequate inventory procurement due to limited availability.
Key Advantages:
- Proven reliability and long service history
- Cost-effective solution for moderate complexity applications
- Comprehensive development tool support through ISE
- Multiple package and speed grade options
- Strong technical documentation and community support
Considerations:
- Obsolete status limits long-term availability
- Legacy development tools required
- Limited technical support from manufacturer
- Consider migration path for future designs
