Overview of XC3SD1800A-4CSG484C FPGA
The XC3SD1800A-4CSG484C is a powerful field-programmable gate array (FPGA) from AMD’s renowned Spartan-3A DSP family. This advanced FPGA delivers exceptional performance for digital signal processing, embedded systems, and complex logic applications. With 1.8 million system gates and 37,440 logic cells, the XC3SD1800A-4CSG484C provides engineers with the computational power needed for demanding applications in telecommunications, industrial automation, and consumer electronics.
Originally designed by Xilinx (now part of AMD), this Xilinx FPGA continues to be a trusted solution for designers seeking reliable, high-performance programmable logic devices.
Key Technical Specifications
Core Features Table
| Specification |
Details |
| Part Number |
XC3SD1800A-4CSG484C |
| Manufacturer |
AMD (formerly Xilinx) |
| Product Family |
Spartan-3A DSP |
| System Gates |
1,800,000 (1.8M) |
| Logic Cells/Elements |
37,440 |
| LABs/CLBs |
4,160 |
| DSP48 Slices |
84 dedicated slices |
| Maximum Operating Frequency |
667 MHz |
| Process Technology |
90nm CMOS |
Memory and I/O Specifications
| Parameter |
Value |
| Total RAM Bits |
1,548,288 (189 KB) |
| Block RAM |
3,456 Kbits |
| Number of I/O Pins |
309 |
| I/O Standards Supported |
LVCMOS, LVTTL, HSTL, SSTL, True LVDS, RSDS, mini-LVDS |
| I/O Output Drive Current |
24 mA |
Power and Environmental Specifications
| Parameter |
Specification |
| Supply Voltage |
1.2V nominal (1.14V – 1.26V range) |
| Operating Temperature Range |
0°C to 85°C (Commercial Extended) |
| Package Type |
484-FBGA, CSPBGA |
| Package Dimensions |
19mm x 19mm |
| Mounting Type |
Surface Mount |
| RoHS Compliance |
RoHS3 Compliant, Lead-Free |
Advanced DSP Capabilities
Digital Signal Processing Features
The XC3SD1800A-4CSG484C excels in DSP applications thanks to its 84 dedicated DSP48 slices. These optimized hardware blocks enable:
- High-speed arithmetic operations for real-time signal processing
- Efficient FIR filter implementations with minimal resource usage
- FFT processing for frequency domain analysis
- Complex mathematical computations at 667 MHz performance
- Low-latency data path operations critical for time-sensitive applications
Memory Architecture
With nearly 1.55 million RAM bits distributed across the device, the XC3SD1800A-4CSG484C offers flexible memory solutions:
- Distributed RAM for small, fast memory requirements
- Block RAM organized as 3,456 Kbits for larger data buffers
- Dual-port memory configurations for simultaneous read/write operations
- Efficient data storage for algorithm implementation
Package and Pin Configuration
CSG484 Package Details
The 484-pin CSPBGA (Chip Scale Ball Grid Array) package provides:
- Compact 19mm x 19mm footprint for space-constrained designs
- Superior thermal performance with efficient heat dissipation
- Excellent signal integrity for high-speed applications
- Ball pitch optimized for reliable PCB assembly
- 309 user I/O pins for flexible connectivity
Pin Configuration Overview
| Pin Type |
Count |
| User I/O Pins |
309 |
| Power Pins |
Multiple VCCINT, VCCAUX, VCCO |
| Ground Pins |
Distributed GND |
| Configuration Pins |
JTAG, SPI, SelectMAP |
| Total Package Pins |
484 |
Target Applications
Industrial and Commercial Applications
The XC3SD1800A-4CSG484C is ideal for:
Telecommunications
- Software-defined radio (SDR) implementations
- Base station signal processing
- Protocol converters and bridges
- Digital up/down converters
Industrial Automation
- Machine vision systems with real-time image processing
- Motor control algorithms with precise PWM generation
- Industrial communication protocols (EtherCAT, PROFINET, Modbus)
- PLC functionality with programmable logic
Consumer Electronics
- Audio/video processing and codec implementations
- Display controllers for LCD/OLED panels
- Digital camera processing pipelines
- Set-top box applications
Data Acquisition Systems
- High-speed ADC interfaces with data buffering
- Sensor fusion algorithms combining multiple inputs
- Real-time data logging with compression
- Signal conditioning and filtering
Development Tools and Support
Design Software Compatibility
The XC3SD1800A-4CSG484C is supported by:
- Xilinx ISE Design Suite – Legacy but proven development environment
- VHDL and Verilog hardware description languages
- IP Core libraries with pre-verified functions
- Embedded development tools for soft processor cores
Programming and Configuration
Multiple configuration methods supported:
- JTAG boundary scan for in-system programming
- SPI serial flash for automatic configuration at power-up
- SelectMAP parallel configuration for faster load times
- Slave serial mode for daisy-chain configurations
Performance Advantages
Speed Grade -4 Benefits
The -4 speed grade designation indicates:
- Enhanced performance over slower speed grades (-3, -2)
- Higher maximum operating frequencies for critical paths
- Reduced propagation delays through logic and routing
- Optimal balance between performance and power consumption
Competitive Advantages
| Feature |
Advantage |
| 1.8M Gates |
Sufficient resources for complex designs |
| 84 DSP Slices |
Dedicated hardware accelerates DSP algorithms |
| 90nm Technology |
Mature, reliable process node |
| 309 I/O Pins |
Extensive connectivity options |
| 667 MHz Operation |
High-speed real-time processing |
Quality and Reliability
Manufacturing Standards
- RoHS3 compliant meeting latest environmental regulations
- Lead-free (Pbfree) construction for eco-friendly designs
- Industrial temperature range (0°C to 85°C) for harsh environments
- Rigorous testing per AMD/Xilinx quality standards
Supply Chain Information
- Product Status: Active
- Manufacturer Lead Time: Approximately 30 weeks
- Packaging: Anti-static tray packaging
- ESD Protection: Full electrostatic discharge protection during shipping
Getting Started Guide
Design Checklist
- Power Supply Design: Implement proper 1.2V core and I/O voltage regulation
- Decoupling: Place bypass capacitors close to power pins
- Thermal Management: Ensure adequate cooling for high-utilization designs
- Clock Distribution: Use dedicated clock resources for optimal performance
- I/O Planning: Assign pins according to bank voltage requirements
Recommended PCB Guidelines
- Minimum 6-layer PCB for signal integrity
- Controlled impedance traces for high-speed signals
- Adequate ground planes for power distribution
- Via-in-pad technology for BGA mounting
Pricing and Availability
The XC3SD1800A-4CSG484C is available through authorized distributors worldwide. Pricing varies based on:
- Order quantity (volume discounts available)
- Lead time requirements (expedited vs. standard)
- Distribution channel (authorized vs. franchised)
Educational institutions may qualify for special academic pricing programs.
Alternative and Compatible Devices
Speed Grade Variants
| Part Number |
Speed Grade |
Key Difference |
| XC3SD1800A-5CSG484C |
-5 |
Faster performance |
| XC3SD1800A-4CSG484C |
-4 |
Balanced performance (this device) |
| XC3SD1800A-3CSG484C |
-3 |
Lower cost option |
Package Alternatives
Other Spartan-3A DSP devices in different packages:
- XC3SD1800A-4FGG676 – Larger 676-pin package with more I/O
- XC3SD1800A-4FG484 – Standard FBGA variant
Frequently Asked Questions
What is the operating frequency of the XC3SD1800A-4CSG484C?
The maximum operating frequency is 667 MHz, though actual performance depends on design complexity and routing.
Is the XC3SD1800A-4CSG484C RoHS compliant?
Yes, this device is fully RoHS3 compliant and uses lead-free construction.
What development tools are required?
Xilinx ISE Design Suite is the primary development environment for this Spartan-3A DSP device.
Can this FPGA be used for motor control applications?
Absolutely. The dedicated DSP slices and high I/O count make it excellent for advanced motor control algorithms.
What is the difference between speed grades?
Higher speed grades (-5, -6) offer faster maximum frequencies but at higher cost. The -4 grade provides excellent performance-to-cost ratio.
Conclusion
The XC3SD1800A-4CSG484C represents a mature, proven FPGA solution from AMD’s Spartan-3A DSP family. With 1.8 million gates, 84 DSP slices, and 667 MHz performance, it delivers the computational power needed for demanding embedded applications. Whether you’re implementing telecommunications infrastructure, industrial automation systems, or consumer electronics products, this FPGA provides the flexibility, performance, and reliability required for successful product development.
For designers seeking a cost-effective FPGA with robust DSP capabilities, the XC3SD1800A-4CSG484C continues to be an excellent choice backed by extensive ecosystem support and proven design heritage.
