Overview of the XC5204-5PC84C FPGA

The XC5204-5PC84C is a powerful Field Programmable Gate Array (FPGA) from AMD (formerly Xilinx), designed to deliver exceptional performance for embedded system applications. As part of the renowned XC5200 family, this FPGA combines flexibility, reliability, and cost-effectiveness, making it an ideal choice for engineers and designers working on complex digital logic projects.

This versatile FPGA offers 480 logic elements/cells with 120 configurable logic blocks (CLBs), providing 6,000 usable gates for implementing sophisticated digital circuits. The device’s 65 I/O pins enable seamless integration into various system architectures, while its 84-pin LCC (J-Lead) package ensures compact footprint and excellent thermal performance.

Key Specifications and Features

Technical Specifications Table

Performance Characteristics Table

Advanced Architecture and Design Features

VersaBlock Logic Module

The XC5204-5PC84C incorporates Xilinx’s innovative VersaBlock architecture, which provides:

• Register-Rich Design: Enhanced capability for complex sequential logic implementation
• Flexible Configuration: Adaptable logic cells for various design requirements
• Efficient Resource Utilization: Optimized gate-to-logic cell ratio
• Low-Cost Implementation: Cost-effective solution without compromising performance

VersaRing I/O Interface

This Xilinx FPGA features the advanced VersaRing I/O interface, offering:

• High Logic-to-I/O Ratio: 65 I/O signals optimized for system connectivity
• Programmable Slew Rate Control: Adjustable output characteristics to minimize noise and maximize signal integrity
• Zero Hold Time: Simplified system timing for input registers
• Flexible I/O Standards: Compatible with multiple voltage and signaling standards

Interconnect Architecture

The hierarchical interconnect resources provide:

• Fast Signal Routing: Optimized routing channels for high-speed data paths
• Low Latency: Minimized signal propagation delays
• Enhanced Design Flexibility: Multiple routing options for complex designs
• Efficient Place-and-Route: Streamlined implementation process

Application Areas and Use Cases

Industrial Control Systems

The XC5204-5PC84C excels in industrial automation applications:

• Process Control: Real-time monitoring and control logic
• Motor Control: PWM generation and feedback processing
• Sensor Interfaces: Multi-channel data acquisition and processing
• Protocol Conversion: Interface translation between different communication standards

Communication Infrastructure

Ideal for telecommunications and networking applications:

• Data Protocol Implementation: Custom protocol handlers
• Signal Processing: Digital filtering and conditioning
• Interface Bridging: Connection between different communication standards
• Clock Management: Precision timing and synchronization circuits

Consumer Electronics

Perfect for various consumer applications:

• Display Controllers: Video timing and control logic
• Audio Processing: Digital signal processing for audio applications
• Peripheral Interfaces: USB, SPI, I2C controller implementations
• System Control: Central logic for multi-function devices

Educational and Prototyping

Excellent choice for learning and development:

• FPGA Training: Hands-on learning platform for digital design
• Proof-of-Concept: Rapid prototyping of digital circuits
• Algorithm Implementation: Testing custom logic architectures
• Design Verification: Hardware validation before ASIC implementation

Design Tools and Development Support

Compatible Design Entry Methods

The XC5204-5PC84C is fully supported by comprehensive development tools:

• ABEL: Hardware description language support
• Schematic Capture: Visual design entry for straightforward implementations
• VHDL: Industry-standard hardware description language
• Verilog HDL: Alternative HDL for design synthesis
• Logic Synthesis: Integration with popular synthesis tools

Development Platform Support

Designers can work with their preferred platforms:

• PC-Based Development: Windows operating system compatibility
• Workstation Platforms: UNIX/Linux development environment support
• Xilinx ISE Design Suite: Comprehensive design, synthesis, and implementation tools
• Third-Party Tools: Compatible with industry-standard EDA software

Design Flow Advantages

The FPGA supports a streamlined design process:

1. Design Entry: Multiple entry method options
2. Synthesis: Optimized logic synthesis for efficient implementation
3. Place and Route: Automated resource allocation
4. Timing Analysis: Built-in timing verification
5. Programming: Fast SRAM-based configuration

Package Information and Physical Characteristics

84-Pin LCC Package Details

The J-lead package offers several benefits:

• Compact Footprint: Space-efficient design for high-density boards
• Excellent Thermal Performance: Efficient heat dissipation
• Reliable Connection: Robust mechanical and electrical interface
• SMT Compatible: Standard surface mount assembly process
• Test-Friendly: Accessible leads for inspection and testing

Pin Configuration

The 65 I/O pins provide:

• Flexible Assignment: User-configurable pin functions
• Dedicated Pins: Clock, configuration, and power pins
• Ground Distribution: Multiple ground pins for signal integrity
• Power Planes: Adequate power distribution for reliable operation

Comparison with Related Products

XC5200 Family Overview

Reliability and Quality Standards

The XC5204-5PC84C meets stringent quality requirements:

• Manufacturing Process: Proven 0.5µm CMOS technology
• Quality Assurance: Rigorous testing and validation procedures
• ESD Protection: Built-in electrostatic discharge protection
• Long-Term Reliability: Designed for extended operational life
• RoHS Compliance: Lead-free options available (check specific part numbers)

Configuration and Programming

SRAM-Based Configuration

The device features:

• Reprogrammable Architecture: Unlimited reconfiguration cycles
• Fast Configuration: Quick startup times
• In-System Programming: Field updates and modifications
• Configuration Modes: Multiple programming interface options
• Non-Volatile Storage: External configuration memory support

Configuration Methods

Available programming options include:

• Master Serial Mode: FPGA controls configuration process
• Slave Serial Mode: External controller manages programming
• SelectMAP Mode: Parallel configuration for faster loading
• JTAG Boundary Scan: IEEE 1149.1 compliant programming and testing

Power Consumption and Thermal Management

Power Requirements

Understanding power characteristics:

• Core Voltage: 5V nominal (4.75V – 5.25V range)
• Dynamic Power: Frequency and utilization dependent
• Static Power: Low standby current consumption
• I/O Power: Dependent on drive strength and loading

Thermal Considerations

Effective thermal management ensures:

• Junction Temperature: Maximum 85°C for commercial grade
• Package Thermal Resistance: Optimized for heat dissipation
• Cooling Requirements: Natural convection typically sufficient
• Thermal Design: Consider ambient temperature and system airflow

Ordering Information and Availability

Part Number Breakdown

Understanding the part number structure:

XC5204-5PC84C

• XC5204: Device type (480 logic cells)
• -5: Speed grade (5.6ns delay)
• PC84: Package type (84-pin Plastic Chip Carrier)
• C: Commercial temperature range (0°C to +85°C)

Lifecycle Status

Important Note: The XC5204-5PC84C is considered an obsolete/legacy product by the manufacturer. While this FPGA is no longer in active production, it remains available through authorized distributors and specialty suppliers for:

• Replacement Parts: Maintaining existing designs
• Legacy System Support: Continuing production of established products
• Educational Purposes: Training and development applications
• Small-Scale Projects: Prototyping and limited production runs

Alternative Solutions

For new designs, consider these modern alternatives:

• Spartan Series: Current low-cost FPGA families from AMD/Xilinx
• Artix-7 Family: Enhanced performance and features
• ECP5 FPGAs: Alternative vendor options with similar capabilities
• iCE40 Series: Ultra-low power alternatives for specific applications

Design Considerations and Best Practices

Successful Implementation Tips

Maximize your design efficiency:

1. Resource Planning: Map logic requirements to available cells
2. Clock Distribution: Utilize dedicated clock networks
3. I/O Planning: Optimize pin assignments early in design
4. Timing Closure: Account for routing delays in timing analysis
5. Power Distribution: Ensure adequate decoupling capacitors

Common Design Patterns

Effective utilization strategies:

• State Machines: Implement control logic efficiently
• Data Path Logic: Optimize arithmetic and logical operations
• Interface Logic: Streamline communication protocols
• Memory Implementation: Use distributed RAM capabilities

Testing and Validation

Ensure design reliability:

• Functional Simulation: Verify logic behavior
• Timing Analysis: Confirm performance requirements
• JTAG Testing: Utilize boundary scan capabilities
• In-System Verification: Real-world testing protocols

Technical Support and Resources

Documentation

Essential design resources:

• Datasheet: Complete electrical and functional specifications
• User Guide: Detailed architecture and design information
• Application Notes: Specific implementation examples
• Reference Designs: Proven design templates

Community Support

Access expertise through:

• Technical Forums: Community-driven problem solving
• Design Consultants: Professional design services
• Training Materials: Educational resources and tutorials
• Webinars: Online learning opportunities

Frequently Asked Questions

Is the XC5204-5PC84C suitable for new designs?

While the device is obsolete, it can still be used for educational purposes, legacy system maintenance, or small-scale prototyping. For new commercial designs, modern FPGA families offer better performance, lower power consumption, and longer-term availability.

What development tools are required?

The XC5204-5PC84C is supported by Xilinx ISE Design Suite. While this tool is also legacy, it remains available for download and supports the complete design flow from entry through programming.

Can I replace this FPGA with a newer device?

Direct replacement depends on your specific design. Modern FPGAs offer migration paths, but may require design modifications due to architecture differences. Consult with technical support for replacement strategies.

What configuration memory is recommended?

Standard serial PROMs compatible with Xilinx FPGAs can be used. The specific memory size depends on your bitstream requirements, typically in the range of 128Kbit to 256Kbit for this device.

Are there temperature variants available?

The “C” suffix indicates commercial temperature range (0°C to +85°C). Industrial temperature variants may have been available under different part numbers. Check with distributors for specific requirements.

Conclusion

The XC5204-5PC84C represents a proven FPGA solution from the respected XC5200 family. While classified as a legacy product, it continues to serve applications requiring moderate logic density, reliable 5V operation, and cost-effective programmable logic implementation. With 480 logic cells, 65 I/O pins, and comprehensive development tool support, this FPGA remains valuable for maintenance of existing designs, educational applications, and specific embedded system requirements.

For engineers working with legacy systems or seeking cost-effective FPGA solutions for non-critical applications, the XC5204-5PC84C delivers solid performance backed by Xilinx’s established architecture and extensive design resources. When planning new projects, consider evaluating modern FPGA alternatives while leveraging the knowledge and experience gained from this reliable platform.