Overview of XC2S400E-6FG456C Field-Programmable Gate Array
The XC2S400E-6FG456C is a high-performance field-programmable gate array (FPGA) from AMD’s Spartan-IIE family, engineered to deliver exceptional programmable logic capabilities for industrial automation, communication systems, and embedded computing applications. This versatile FPGA chip combines robust performance with cost-effective design flexibility, making it ideal for high-volume production environments.
Key Technical Specifications
Core FPGA Performance Features
| Specification |
Value |
| System Gates |
400,000 gates |
| Logic Cells |
10,800 cells |
| Maximum Frequency |
357 MHz |
| Process Technology |
0.15µm CMOS |
| Operating Voltage |
1.8V core / 3.3V I/O |
| Package Type |
456-Pin FBGA (Fine-Pitch Ball Grid Array) |
| Package Code |
FG456 |
| Speed Grade |
-6 (commercial temperature range) |
Memory and Storage Capabilities
| Memory Feature |
Specification |
| Block RAM Columns |
4 columns |
| Total RAM Capacity |
Up to 4.6 Mb |
| Distributed RAM |
Available through CLBs |
| Configuration Memory |
SRAM-based |
Detailed Product Features
Advanced Architecture Design
The XC2S400E-6FG456C leverages AMD Xilinx’s proven Spartan-IIE architecture, incorporating:
- Configurable Logic Blocks (CLBs): High-density programmable logic elements arranged in a flexible array structure
- Input/Output Blocks (IOBs): 456 user I/O pins supporting multiple voltage standards including 2.5V and 3.3V
- Block RAM Resources: Four dedicated block RAM columns extending the full chip height for efficient memory implementation
- General Routing Matrix (GRM): Advanced interconnect architecture enabling optimized signal routing
- VersaRing Routing Technology: Enhanced routing flexibility supporting pin-swapping and pin-locking capabilities
Programmability and Configuration
This Xilinx FPGA supports multiple configuration modes:
- Master Serial Mode with external PROM
- Slave Serial Mode for controlled programming
- Slave Parallel Mode for faster configuration
- Boundary Scan (JTAG) for development and debugging
- Platform Flash in-system programmable configuration support
Clock Management Features
| Clock Feature |
Capability |
| DLL Resources |
Integrated Delay-Locked Loops |
| Global Clock Networks |
Multiple dedicated global buffers |
| Clock Mirroring |
DLL-based clock distribution |
| Clock Frequency Range |
DC to 357 MHz |
Application Areas and Use Cases
Industrial Automation and Control Systems
The XC2S400E-6FG456C excels in industrial automation applications requiring real-time processing, including:
- Programmable Logic Controllers (PLCs)
- Motor control systems
- Factory automation equipment
- Process control interfaces
- Industrial robotics controllers
Communication and Networking
Ideal for communication infrastructure:
- Protocol conversion and bridging
- Network packet processing
- Serial interface controllers
- Data acquisition systems
- Signal processing applications
Embedded System Design
Perfect for embedded computing solutions:
- Custom processor implementations
- Hardware acceleration modules
- Real-time data processing
- Interface protocol implementation
- System-on-Chip (SoC) prototyping
Package and Mechanical Specifications
FBGA Package Details
| Package Characteristic |
Specification |
| Total Pin Count |
456 pins |
| Package Type |
Fine-pitch Ball Grid Array |
| Body Size |
Standard FBGA footprint |
| Mounting Type |
Surface Mount Technology (SMT) |
| RoHS Compliance |
Lead-free options available |
Power Supply Requirements
Voltage Specifications
| Power Rail |
Voltage Range |
Typical Current |
| VCCINT (Core) |
1.8V ±5% |
Application dependent |
| VCCO (I/O) |
1.8V to 3.3V |
Bank-specific |
| VCCAUX (Auxiliary) |
2.5V or 3.3V |
Low current |
Design Tools and Software Support
The XC2S400E-6FG456C is fully supported by AMD Xilinx development tools:
- ISE Design Suite: Complete FPGA design environment
- ChipScope Pro: Integrated logic analyzer
- CORE Generator: IP core integration tool
- Impact: Configuration and programming utility
- Timing Analyzer: Static timing analysis tools
Performance Optimization Tips
Maximizing FPGA Efficiency
To achieve optimal performance with the XC2S400E-6FG456C:
- Clock Domain Management: Properly isolate different clock domains using DLL resources
- Resource Utilization: Balance logic between CLBs and block RAM for efficient implementation
- Timing Closure: Utilize timing constraints early in the design process
- Power Distribution: Implement robust power supply decoupling networks
- Thermal Management: Ensure adequate cooling for high-utilization designs
Comparison with Related Devices
Spartan-IIE Family Positioning
| Device |
System Gates |
Logic Cells |
Block RAM |
I/O Pins |
| XC2S50E |
50,000 |
1,728 |
2 columns |
182 |
| XC2S150E |
150,000 |
3,456 |
3 columns |
265 |
| XC2S400E |
400,000 |
10,800 |
4 columns |
456 |
| XC2S600E |
600,000 |
15,552 |
6 columns |
514 |
Quality and Reliability
Product Lifecycle Status
Important Note: The XC2S400E-6FG456C is currently designated as obsolete/discontinued per AMD Xilinx change notice XCN12026. While existing inventory remains available through authorized distributors, this device is not recommended for new designs. Consider newer Spartan or Artix family devices for current projects.
Testing and Certification
- Full electrical parameter testing
- Temperature range qualification
- 100% configuration verification
- Industry-standard quality certifications
- ISO 9001 compliant manufacturing
Purchase and Availability Information
Ordering Information
Full Part Number: XC2S400E-6FG456C
Where to source:
- Authorized AMD Xilinx distributors
- Electronic component brokers (verify authenticity)
- Specialized FPGA suppliers
Package Marking
Standard device markings include:
- Manufacturer logo (AMD/Xilinx)
- Device part number
- Speed grade designation
- Production date code
- Country of origin
Technical Support Resources
Documentation
- Complete datasheet (DS077)
- Application notes for Spartan-IIE family
- PCB design guidelines
- Configuration guides
- Thermal management documentation
Design Assistance
Access comprehensive technical support through:
- AMD Xilinx support forums
- Technical application engineers
- Design consultation services
- Reference design examples
- Training materials and webinars
Environmental and Compliance
Operating Conditions
| Parameter |
Commercial Grade (-6) |
| Ambient Temperature |
0°C to +85°C |
| Junction Temperature |
Up to +125°C |
| Storage Temperature |
-65°C to +150°C |
| Humidity |
5% to 95% non-condensing |
Frequently Asked Questions
What makes the XC2S400E-6FG456C suitable for industrial applications?
The device combines reliable SRAM-based configuration with robust I/O standards, industrial temperature operation, and proven Spartan architecture, making it ideal for demanding industrial environments requiring long-term availability and field-proven technology.
Can this FPGA be reprogrammed?
Yes, the XC2S400E-6FG456C features unlimited reprogrammability through SRAM-based configuration. The device can be reconfigured in the field using various programming methods including JTAG, serial, and parallel interfaces.
What development tools are required?
AMD Xilinx ISE Design Suite provides complete development support including HDL synthesis, implementation, simulation, and programming capabilities. The software includes all necessary tools for FPGA design, verification, and configuration.
Is this device suitable for new designs?
While the XC2S400E-6FG456C remains a capable FPGA, it has been designated as obsolete by AMD Xilinx. For new product developments, consider migrating to current-generation Spartan-7, Artix-7, or other actively supported FPGA families offering enhanced performance and long-term availability.
Conclusion
The XC2S400E-6FG456C represents a proven solution for embedded FPGA applications requiring moderate logic density, flexible I/O options, and cost-effective implementation. While classified as an obsolete product, existing designs benefit from its mature architecture, extensive documentation, and widespread industry adoption. Engineers should evaluate current Xilinx FPGA families for new projects while existing XC2S400E-6FG456C implementations continue to deliver reliable performance across numerous applications worldwide.
