Overview of XC2S50E-6PQG208C Field Programmable Gate Array

The XC2S50E-6PQG208C is a powerful field-programmable gate array from the Spartan-IIE family, manufactured by Xilinx (now AMD). This FPGA delivers exceptional performance with 50,000 system gates, making it an ideal solution for cost-sensitive applications requiring programmable logic capabilities. The device combines high functionality with low power consumption, utilizing advanced 0.15μm CMOS technology.

Designed for engineers seeking reliable ASIC alternatives, the XC2S50E-6PQG208C offers unlimited reprogrammability without the high development costs and lengthy cycles associated with traditional application-specific integrated circuits. This Xilinx FPGA provides the flexibility to upgrade designs in the field, enabling rapid prototyping and production deployment.

Key Technical Specifications

Core Architecture Features

Memory Configuration

Package and I/O Specifications

Advanced Features and Capabilities

Programmable Logic Resources

The XC2S50E-6PQG208C incorporates robust programmable logic resources that enable complex digital circuit implementation:

• 384 Configurable Logic Blocks (CLBs) providing 1,728 logic cells for versatile design implementation
• SelectRAM hierarchical memory architecture offering both distributed and block RAM options
• Four Delay-Locked Loops (DLLs) for precise clock management and timing control
• 19 selectable I/O standards ensuring compatibility with various interface requirements
• Fast, predictable interconnect architecture maintaining timing requirements across design iterations

System-Level Performance

The Spartan-IIE architecture delivers exceptional system-level capabilities:

• System performance exceeding 200 MHz for high-speed applications
• Pin-to-pin logic delays of 6ns enabling rapid signal processing
• Unlimited in-system reprogrammability for design flexibility
• Low-cost implementation with 0.15μm technology manufacturing process
• Power-efficient design suitable for battery-powered and embedded applications

Applications and Use Cases

Industrial Automation Systems

The XC2S50E-6PQG208C excels in industrial control applications where reliability and reconfigurability are paramount. Its robust architecture supports:

• Motor control and drive systems
• Process automation controllers
• Sensor interface and data acquisition
• Real-time control systems
• Industrial networking protocols

Communications and Networking

This FPGA provides the processing power and flexibility needed for communication infrastructure:

• Protocol conversion and bridging
• Network packet processing
• Wireless communication interfaces
• Data encryption and security
• Signal processing applications

Consumer Electronics

The cost-effective nature of the XC2S50E-6PQG208C makes it suitable for consumer products:

• Automotive body electronics and lighting systems
• Gaming peripherals and controllers
• Personal electronics devices
• Audio/video processing equipment
• Smart home automation systems

Technical Advantages Over Traditional ASICs

Cost-Effectiveness and Risk Reduction

The XC2S50E-6PQG208C eliminates many disadvantages associated with mask-programmed ASICs:

1. No Initial Tooling Costs: Eliminates expensive mask set fees required for ASIC production
2. Reduced Development Time: Accelerates time-to-market with immediate prototyping capabilities
3. Lower Risk Profile: Avoids costly design errors permanently embedded in ASICs
4. Flexible Volume Production: Suitable for both low and high-volume manufacturing

Field Upgrade Capability

Unlike ASICs, the XC2S50E-6PQG208C supports post-deployment updates:

• Remote firmware updates without hardware replacement
• Bug fixes and feature enhancements in deployed systems
• Design optimization based on field performance data
• Extended product lifecycle through continuous improvement

Design Implementation and Configuration

Configuration Methods

The XC2S50E-6PQG208C supports multiple configuration modes for maximum flexibility:

Development Tool Support

Engineers can leverage industry-standard design tools for XC2S50E-6PQG208C development:

• Xilinx ISE Design Suite for synthesis and implementation
• Vivado Design Suite compatibility for newer workflows (note: ISE traditionally recommended for Spartan-IIE)
• VHDL and Verilog HDL support
• Comprehensive IP cores library
• Simulation and verification tools

Electrical Characteristics and Power Management

Power Supply Requirements

Power Consumption Considerations

The 1.8V core voltage and efficient 0.15μm process technology contribute to low power dissipation, making the XC2S50E-6PQG208C suitable for power-sensitive applications. Actual power consumption varies based on:

• Clock frequency and switching activity
• Logic utilization percentage
• I/O standard selection
• Ambient temperature conditions

Package Dimensions and PCB Layout

PQFP208 Package Specifications

The 208-pin Plastic Quad Flat Pack provides:

• Compact footprint for space-constrained designs
• Fine-pitch leads enabling high-density PCB routing
• Thermal performance suitable for commercial applications
• Industry-standard package ensuring second-source availability

PCB Design Recommendations

For optimal performance, consider these layout guidelines:

• Implement proper power supply decoupling with bypass capacitors
• Maintain controlled impedance for high-speed signals
• Provide adequate thermal management and airflow
• Follow recommended footprint specifications from datasheet
• Consider signal integrity for frequencies exceeding 100 MHz

Comparison with Related Spartan-IIE Devices

Speed Grade Variants

Alternative Package Options

Ordering Information and Lifecycle Status

Part Number Nomenclature

Breaking down the XC2S50E-6PQG208C designation:

• XC2S = Spartan-II family identifier
• 50E = 50,000 gates, E-series (enhanced/IIE)
• 6 = Speed grade (-6)
• PQG = Plastic Quad Flat Pack, Green (lead-free)
• 208 = Pin count
• C = Commercial temperature grade

Availability and Procurement

Important Note: The XC2S50E-6PQG208C is classified as an obsolete/discontinued product. While new stock may be available through:

• Authorized distributors (limited inventory)
• Excess stock suppliers
• Specialized obsolete component vendors
• Aftermarket electronic component brokers

For new designs, consider migrating to current-generation Xilinx FPGA families such as Artix-7, Spartan-7, or newer devices offering enhanced performance and ongoing support.

Quality and Compliance Standards

Environmental Compliance

Export Classification

• ECCN Code: EAR99
• USHTS: 8542390001
• TARIC: 8542399000

Getting Started with XC2S50E-6PQG208C

Essential Resources

To begin developing with the XC2S50E-6PQG208C:

1. Download Datasheet: Access complete specifications from Xilinx/AMD documentation portal
2. Obtain Development Tools: Install ISE Design Suite (version compatible with Spartan-IIE)
3. Reference Designs: Leverage Xilinx IP cores and example projects
4. Community Support: Engage with Xilinx community forums for troubleshooting

Evaluation and Prototyping

While dedicated evaluation boards for the XC2S50E-6PQG208C are limited due to obsolescence status, engineers can:

• Design custom prototype boards
• Utilize compatible Spartan-IIE development platforms
• Consider socket-based prototyping solutions
• Evaluate functionality using FPGA simulation tools

Frequently Asked Questions

Q: What is the maximum operating frequency of the XC2S50E-6PQG208C?
A: The device supports system performance beyond 200 MHz, with specific achievable frequencies depending on design complexity and routing.

Q: Can this FPGA be reprogrammed in-circuit?
A: Yes, the XC2S50E-6PQG208C supports unlimited in-system reprogrammability through multiple configuration modes including JTAG.

Q: What development software is required?
A: Xilinx ISE Design Suite is the recommended development environment for Spartan-IIE FPGAs, supporting VHDL and Verilog HDL.

Q: Is the XC2S50E-6PQG208C pin-compatible with other Spartan devices?
A: Within the same package type (PQG208), different speed grades are generally pin-compatible, but verify specific pinout requirements.

Q: What alternatives exist for new designs?
A: Consider current Xilinx families like Spartan-7 (XC7S series) or Artix-7 for new projects requiring ongoing support and advanced features.

Conclusion

The XC2S50E-6PQG208C represents a proven FPGA solution combining cost-effectiveness with substantial programmable logic resources. While classified as obsolete, this device remains valuable for legacy system maintenance, cost-sensitive applications, and scenarios where its specific features align with project requirements.

Engineers should evaluate current-generation FPGAs for new designs while leveraging the XC2S50E-6PQG208C’s unlimited reprogrammability, 50,000 system gates, and comprehensive I/O capabilities for appropriate applications. Its Spartan-IIE architecture continues to provide reliable performance in industrial automation, communications, and embedded systems worldwide.

For technical specifications, procurement inquiries, or migration guidance to newer FPGA families, consult with authorized distributors or Xilinx/AMD technical support resources.