Product Overview: XC3SD3400A-7FGG676I FPGA
The XC3SD3400A-7FGG676I is a cutting-edge Field Programmable Gate Array (FPGA) from AMD’s (formerly Xilinx) renowned Spartan-3A DSP family, specifically engineered for demanding digital signal processing applications. This industrial-grade FPGA combines exceptional performance with cost-effectiveness, making it the ideal choice for telecommunications, embedded systems, automotive electronics, and industrial control applications.
As part of the Spartan-3A DSP series, the XC3SD3400A-7FGG676I delivers superior DSP capabilities while maintaining the flexibility and reprogrammability that distinguishes Xilinx FPGA solutions from traditional ASICs.
Technical Specifications
Core Architecture Specifications
| Parameter |
Specification |
| Product Family |
Spartan-3A DSP FPGA |
| Part Number |
XC3SD3400A-7FGG676I |
| System Gates |
3.4 Million gates |
| Logic Cells |
53,712 cells |
| Configurable Logic Blocks (CLBs) |
5,968 CLBs |
| Speed Grade |
-7 (highest performance) |
| Maximum Operating Frequency |
Up to 770 MHz |
| Process Technology |
90nm CMOS technology |
| Core Voltage |
1.2V |
Package Details
| Specification |
Value |
| Package Type |
FBGA (Fine-pitch Ball Grid Array) |
| Pin Count |
676 pins |
| Package Code |
FGG676 |
| Temperature Range |
Industrial Grade: -40°C to +100°C |
| Moisture Sensitivity Level |
MSL 3 |
DSP Resources and Memory Architecture
| Feature |
Specification |
| XtremeDSP DSP48A Slices |
126 slices @ 250 MHz |
| Dedicated 18×18 Multipliers |
126 multipliers |
| Block RAM |
Up to 2,268 Kbits with byte write enables |
| Distributed RAM |
Up to 373 Kbits |
| Block RAM Performance |
280 MHz (minimum) |
| 48-bit Accumulator |
Integrated MAC operation support |
I/O and Connectivity Features
| Parameter |
Details |
| User I/O Pins |
Up to 519 I/O pins |
| Differential Signal Pairs |
Up to 227 pairs |
| Supported I/O Standards |
LVTTL, LVCMOS (3.3V, 2.5V, 1.8V, 1.5V, 1.2V), HSTL, SSTL, Differential standards |
| SelectIO Technology |
Multi-voltage, multi-standard interface |
| Digital Clock Managers (DCMs) |
Advanced clocking resources |
Key Features and Benefits
Advanced DSP Performance
The XC3SD3400A-7FGG676I excels in digital signal processing applications with its dedicated hardware multipliers and DSP slices. The 250 MHz XtremeDSP DSP48A slices provide:
- High-speed 18×18 multipliers for efficient signal processing
- 48-bit accumulator for multiply-accumulate (MAC) operations
- Integrated pre-adder for complex mathematical operations
- Cascaded multiply capability for enhanced performance
- Pipeline stages enabling operation at 250 MHz+ in standard speed grades
Memory Architecture Excellence
The hierarchical SelectRAM memory system offers:
- Fast block RAM with up to 2,268 Kbits capacity
- Byte-write enables optimized for processor applications
- Distributed RAM providing up to 373 Kbits of efficient storage
- Registered outputs on block RAM for improved timing
- Dual-port capability for concurrent read/write operations
Power Management Features
Advanced power optimization ensures efficiency across applications:
- Dual-range VCCAUX supply simplifying 3.3V-only designs
- Suspend mode for reduced system power consumption
- Hibernate mode for ultra-low power standby
- Low-power option reducing quiescent current
- Intelligent clock gating for dynamic power management
Flexible I/O Capabilities
The multi-voltage SelectIO interface provides:
- Maximum flexibility with support for multiple I/O standards
- High-speed differential signaling capabilities
- Single-ended and differential I/O configurations
- On-chip termination for signal integrity
- Programmable drive strength and slew rate control
Application Areas
Telecommunications and Networking
The XC3SD3400A-7FGG676I excels in:
- Wireless base stations requiring high-speed DSP
- Software-defined radio (SDR) implementations
- Network packet processing and routing
- 5G/LTE signal processing applications
- Voice over IP (VoIP) systems
Industrial and Automotive
Ideal for demanding industrial applications:
- Motor control systems with precise PWM generation
- Industrial automation and control systems
- Automotive infotainment systems
- Advanced driver assistance systems (ADAS)
- Industrial imaging and machine vision
Medical and Scientific Instrumentation
Perfect for precision instruments:
- Medical imaging equipment (ultrasound, CT, MRI)
- Laboratory test equipment
- Signal analysis instruments
- Data acquisition systems
- Spectroscopy equipment
Audio and Video Processing
Optimized for multimedia applications:
- Video encoding/decoding systems
- Audio DSP processing
- Broadcast equipment
- Professional audio mixers
- Digital video recorders (DVR)
Development Tools and Software Support
Design Software
The XC3SD3400A-7FGG676I is supported by comprehensive development tools:
- Vivado Design Suite: Modern synthesis and implementation toolchain
- ISE Design Suite: Legacy support for existing designs
- IP Core Library: Pre-verified intellectual property blocks
- System Generator for DSP: MATLAB/Simulink integration
- ChipScope Pro: Real-time debugging and analysis
Programming and Configuration
Multiple configuration options available:
- JTAG programming for development and debugging
- SelectMAP interface for fast configuration
- Serial configuration modes (SPI, BPI)
- Partial reconfiguration support
- Multi-boot capability for redundancy
Comparison with Related Models
Speed Grade Variants
| Model |
Speed Grade |
Max Frequency |
Application Focus |
| XC3SD3400A-7FGG676I |
-7 |
770 MHz |
Highest performance |
| XC3SD3400A-5FGG676I |
-5 |
700 MHz |
Balanced performance |
| XC3SD3400A-4FGG676I |
-4 |
667 MHz |
Cost-optimized |
Package Options
The XC3SD3400A family offers multiple package choices:
- FGG676 (676-pin FBGA): Maximum I/O capability
- CSG484 (484-pin csBGA): Compact footprint
- CG484 (484-pin ceramic): High-reliability applications
Quality and Reliability
Manufacturing Standards
The XC3SD3400A-7FGG676I meets stringent quality requirements:
- RoHS compliant for environmental compliance
- Pb-free assembly following industry standards
- ISO 9001 certified manufacturing facilities
- Automotive-grade options available (AEC-Q100)
- Extended temperature range variants for harsh environments
Testing and Validation
Comprehensive testing ensures reliability:
- 100% factory functional testing
- Temperature and voltage characterization
- Signal integrity verification
- Long-term reliability testing
- Qualification to JESD standards
Ordering Information
Part Number Breakdown
XC3SD3400A-7FGG676I decodes as:
- XC3S = Spartan-3A family
- D3400 = 3.4M system gates with DSP
- A = Automotive/Advanced features
- -7 = Speed grade (highest performance)
- FGG676 = 676-pin FBGA package
- I = Industrial temperature range (-40°C to +100°C)
Availability and Distribution
The XC3SD3400A-7FGG676I is available through:
- Authorized AMD/Xilinx distributors
- Global semiconductor marketplaces
- Franchise distributors worldwide
- Direct from manufacturer (volume orders)
Design Considerations
PCB Layout Guidelines
Critical design factors for optimal performance:
- Power supply decoupling: Multiple bypass capacitors near power pins
- Ground plane integrity: Solid ground planes for noise reduction
- Signal routing: Matched impedance for high-speed signals
- Thermal management: Adequate heat dissipation provisions
- Configuration interface: Clean, noise-free configuration signals
Power Supply Requirements
Proper power delivery ensures reliable operation:
- VCCINT (1.2V): Core logic power supply
- VCCAUX (2.5V or 3.3V): Auxiliary circuitry supply
- VCCO (1.2V to 3.3V): I/O bank power supplies
- Power sequencing: Follow recommended power-up sequence
- Decoupling strategy: Per datasheet recommendations
Documentation and Support Resources
Technical Documentation
Comprehensive documentation available:
- Product Datasheet: Complete electrical and timing specifications
- User Guide: Detailed architecture and feature descriptions
- Application Notes: Design tips and best practices
- PCB Design Guide: Layout and routing recommendations
- Packaging and Pinout: Mechanical drawings and pin assignments
Community and Support
Access extensive support resources:
- AMD Support Portal: Technical documentation and downloads
- Community Forums: User discussions and solutions
- Application Engineers: Direct technical support
- Training Programs: Online and in-person courses
- Design Services: Partner ecosystem for development assistance
Why Choose the XC3SD3400A-7FGG676I?
Performance Advantages
The -7 speed grade delivers:
- Maximum operating frequency of 770 MHz
- Fastest logic propagation delays in the family
- Critical path optimization for timing-critical designs
- Enhanced DSP performance for demanding applications
- Superior timing margins for reliable operation
Cost-Effectiveness
Compared to alternative solutions:
- Lower NRE costs vs. ASIC development
- Rapid prototyping reduces time-to-market
- Field upgradability extends product lifecycle
- Single design supports multiple product variants
- Volume pricing competitive with alternative technologies
Ecosystem Benefits
Comprehensive development ecosystem:
- Mature toolchain with extensive optimization capabilities
- Large IP library accelerates development
- Broad third-party support from tools to IP vendors
- Active community for knowledge sharing
- Long-term availability ensures product longevity
Frequently Asked Questions
What is the difference between speed grades?
Speed grades (-4, -5, -7) indicate maximum operating frequency. The -7 grade offers the highest performance but typically at a premium price. Choose based on your timing requirements.
Is the XC3SD3400A-7FGG676I RoHS compliant?
Yes, this device meets RoHS requirements for lead-free assembly and environmentally responsible manufacturing.
What development boards support this FPGA?
Several evaluation platforms support the Spartan-3A DSP family, including Xilinx starter kits and third-party development boards featuring similar devices.
Can I upgrade from a lower speed grade?
Yes, devices are pin-compatible within the same package. You can upgrade from -4 or -5 to -7 grade for improved performance without board changes.
What software do I need to develop with this FPGA?
The ISE Design Suite or Vivado Design Suite (for newer workflows) provides complete development capabilities. Both are available from AMD/Xilinx.
Conclusion
The XC3SD3400A-7FGG676I represents the pinnacle of performance in the Spartan-3A DSP FPGA family. With its combination of 3.4 million system gates, 126 dedicated DSP slices, extensive memory resources, and the highest -7 speed grade, this FPGA delivers exceptional performance for demanding digital signal processing applications.
Whether you’re developing telecommunications equipment, industrial control systems, medical instrumentation, or multimedia processing solutions, the XC3SD3400A-7FGG676I provides the processing power, flexibility, and reliability your application demands. Its comprehensive development ecosystem, proven reliability, and cost-effective solution make it an excellent choice for engineers seeking high-performance FPGA capabilities.
For more information about Xilinx FPGA solutions and to explore the complete Spartan-3A DSP family, visit our comprehensive Xilinx FPGA resource center.
