Overview of XC2S400E-7FGG456C FPGA
The XC2S400E-7FGG456C is a powerful field-programmable gate array (FPGA) from the Spartan-IIE family, manufactured by AMD (formerly Xilinx). This advanced programmable logic device delivers exceptional performance for embedded systems, industrial control applications, and digital signal processing projects. With 400,000 system gates and 456-pin fine-pitch ball grid array (FBGA) packaging, this FPGA offers designers the flexibility and computational power needed for complex digital designs.
Key Technical Specifications
Core Features and Performance Parameters
| Specification |
Details |
| Part Number |
XC2S400E-7FGG456C |
| Manufacturer |
AMD (Xilinx) |
| Product Family |
Spartan-IIE |
| Logic Elements |
400,000 System Gates |
| Package Type |
FBGA (Fine-Pitch Ball Grid Array) |
| Pin Count |
456 pins |
| Speed Grade |
-7 (High Performance) |
| Operating Temperature |
Commercial (0°C to +85°C) |
| Supply Voltage |
1.8V Core / 3.3V I/O |
Memory and I/O Resources
| Resource Type |
Quantity |
| CLBs (Configurable Logic Blocks) |
4,704 |
| Distributed RAM |
73 Kbits |
| Block RAM |
288 Kbits |
| User I/O Pins |
Up to 333 |
| Digital Clock Managers (DCMs) |
4 |
| Multiplier Blocks |
40 (18×18) |
Applications and Use Cases for XC2S400E-7FGG456C
Industrial Control Systems
The XC2S400E-7FGG456C excels in factory automation, motor control, and process monitoring applications. Its robust architecture supports real-time control algorithms and interfaces seamlessly with industrial communication protocols.
Embedded Digital Signal Processing
With dedicated multiplier blocks and substantial memory resources, this Xilinx FPGA handles complex DSP algorithms including filtering, FFT operations, and image processing with ease.
Communications Infrastructure
The device supports high-speed serial interfaces and parallel communication protocols, making it ideal for networking equipment, data acquisition systems, and telecommunications applications.
Consumer Electronics
From video processing to audio equipment, the XC2S400E-7FGG456C provides the computational flexibility required for modern multimedia applications.
Technical Architecture and Design Features
Configurable Logic Block (CLB) Structure
Each CLB contains four logic cells with dedicated fast carry logic, ideal for arithmetic operations and counter implementations. The flexible interconnect architecture enables efficient routing of complex designs.
Memory Architecture
The dual-memory architecture combines:
- Distributed RAM: Small, fast memory elements integrated within CLBs
- Block RAM: Dedicated 18-Kbit blocks optimized for buffering and storage
Clock Management System
Four Digital Clock Managers provide:
- Clock frequency synthesis and division
- Phase shifting capabilities
- Clock skew elimination
- Multiple output clocks from single source
Package Information and Physical Characteristics
FBGA-456 Package Specifications
| Parameter |
Specification |
| Package Code |
FGG456 |
| Body Size |
23mm x 23mm |
| Ball Pitch |
1.0mm |
| Moisture Sensitivity Level |
MSL 3 |
| RoHS Compliant |
Yes |
Speed Grade Comparison
Understanding the -7 Speed Grade
The “-7” designation indicates this device’s performance tier within the Spartan-IIE family. This speed grade offers:
| Speed Grade |
Maximum Frequency |
Typical Applications |
| -6 |
Standard Performance |
Cost-sensitive designs |
| -7 |
High Performance |
Real-time processing, high-speed I/O |
Development and Programming Support
Compatible Development Tools
- Vivado Design Suite: Complete FPGA design environment
- ISE Design Suite: Legacy support for Spartan-IIE devices
- ModelSim: HDL simulation and verification
- ChipScope Pro: Real-time debugging and analysis
Programming and Configuration
The XC2S400E-7FGG456C supports multiple configuration modes:
- JTAG boundary scan programming
- Master and slave serial modes
- Parallel configuration interface
- SPI flash programming
Design Considerations and Best Practices
Power Management Guidelines
Effective power distribution requires careful attention to:
- Decoupling capacitor placement (0.1µF and 10µF recommended)
- Separate power planes for core and I/O voltage
- Thermal management for high-utilization designs
Signal Integrity Recommendations
To ensure reliable operation:
- Implement proper termination on high-speed signals
- Minimize trace lengths for critical paths
- Use ground planes to reduce electromagnetic interference
- Follow FPGA vendor PCB layout guidelines
Competitive Advantages of XC2S400E-7FGG456C
Cost-Effective Programmable Logic Solution
The Spartan-IIE family offers excellent price-to-performance ratio for mid-range applications, balancing capability with affordability.
Proven Reliability
With extensive field deployment history, this FPGA family demonstrates robust performance in demanding industrial environments.
Scalable Architecture
Designers can easily migrate between Spartan-IIE family members as project requirements evolve, protecting development investment.
Ordering Information and Availability
Part Number Breakdown
XC2S400E-7FGG456C
- XC2S: Spartan-IIE family identifier
- 400E: 400,000 system gates
- 7: Speed grade
- FG: Fine-pitch BGA package
- G456: 456-pin configuration
- C: Commercial temperature range
Related Part Numbers
Designers may also consider these variants:
- XC2S400E-6FGG456C (Standard speed grade)
- XC2S400E-7FG456I (Industrial temperature range)
- XC2S300E-7FGG456C (Lower gate count option)
Frequently Asked Questions
What is the difference between -6 and -7 speed grades?
The -7 speed grade offers approximately 15-20% higher maximum operating frequencies compared to -6, enabling more demanding real-time applications.
Is this FPGA suitable for aerospace applications?
The commercial temperature range version (C suffix) is designed for standard industrial use. For aerospace applications, consider the extended or industrial temperature variants.
What design tools are required?
Xilinx ISE Design Suite (version 14.7 or compatible) provides comprehensive support for Spartan-IIE devices, including synthesis, implementation, and programming capabilities.
How much power does this FPGA consume?
Power consumption varies based on design utilization, typically ranging from 0.5W to 3W depending on clock frequencies, I/O activity, and logic utilization.
Conclusion
The XC2S400E-7FGG456C represents a mature, reliable FPGA solution for industrial and embedded applications requiring substantial logic resources and high-performance operation. Its balanced feature set, competitive pricing, and extensive development tool support make it an excellent choice for production designs. Whether implementing complex control algorithms, digital signal processing functions, or communication interfaces, this Spartan-IIE FPGA delivers the flexibility and performance modern electronic systems demand.
