The XC4028XL-3HQ304C is a powerful field-programmable gate array (FPGA) from Xilinx’s XC4000XL series, engineered to deliver exceptional performance in demanding digital design applications. This versatile programmable logic device combines advanced architecture with reliable operation, making it an ideal choice for engineers developing complex digital systems.
Product Specifications
The XC4028XL-3HQ304C features a robust architecture designed for high-performance applications. This FPGA contains 28,000 system gates with 1,024 configurable logic blocks (CLBs), providing substantial logic capacity for complex designs. The device operates at a -3 speed grade, ensuring fast signal processing and reduced propagation delays for time-critical applications.
Key technical specifications include 3.3V core voltage operation with 5V tolerance on I/O pins, making the XC4028XL-3HQ304C compatible with both 3.3V and 5V systems. The device is housed in a 304-pin plastic quad flat pack (PQFP) package, designated as HQ304, which offers excellent thermal performance and reliable electrical connections. The operating temperature range extends from 0ยฐC to +70ยฐC for commercial applications, while power consumption remains optimized for efficient system design.
The XC4028XL-3HQ304C supports multiple configuration modes including master serial, slave serial, and peripheral modes, providing flexibility in system integration. Internal features include dedicated carry logic, fast carry chains, and on-chip RAM blocks that enhance arithmetic operations and data storage capabilities.
Price Information
Pricing for the XC4028XL-3HQ304C varies based on quantity, supplier, and market conditions. As this is a mature product from Xilinx’s legacy portfolio, availability may be limited to authorized distributors and specialty component suppliers. Engineers should contact authorized Xilinx distributors for current pricing and availability information.
Volume discounts are typically available for production quantities, and engineering samples may be accessible for development purposes. Due to the specialized nature of the XC4028XL-3HQ304C, pricing is generally quoted upon request rather than published in standard catalogs.
Documents & Media
Comprehensive documentation supports the XC4028XL-3HQ304C implementation and design process. The primary datasheet provides detailed electrical specifications, timing parameters, and package information essential for proper circuit design. Pin configuration diagrams and package drawings ensure accurate PCB layout and assembly.
Application notes cover specific implementation topics including configuration procedures, design optimization techniques, and interfacing guidelines. The XC4000XL series user guide offers comprehensive information about architecture, programming, and debugging procedures specific to this FPGA family.
Design software support includes compatibility with Xilinx development tools, enabling schematic capture, HDL synthesis, and timing analysis. IBIS models and SPICE simulation data facilitate signal integrity analysis and system-level simulation for robust design validation.
Related Resources
The XC4028XL-3HQ304C integrates seamlessly with Xilinx’s broader ecosystem of development tools and support resources. Compatible development boards and evaluation kits provide hands-on experience with the device capabilities and accelerate prototype development.
Related FPGAs in the XC4000XL series offer varying gate counts and package options, allowing designers to select the optimal device for specific application requirements. Migration paths to newer Xilinx FPGA families provide upgrade options as designs evolve and performance requirements increase.
Third-party IP cores and reference designs specifically optimized for the XC4000XL architecture expand functionality and reduce development time. Community forums and technical support resources provide ongoing assistance throughout the design and implementation process.
Environmental & Export Classifications
The XC4028XL-3HQ304C meets stringent environmental standards for reliable operation in commercial applications. The device complies with RoHS (Restriction of Hazardous Substances) regulations, ensuring environmental responsibility in manufacturing and disposal processes.
Moisture sensitivity level (MSL) classification guides proper handling and storage procedures to prevent device damage during assembly. The plastic package construction provides adequate protection for standard commercial environments while maintaining cost-effectiveness for volume production.
Export classification information ensures compliance with international trade regulations and export control requirements. As a commercial-grade device, the XC4028XL-3HQ304C is generally available for worldwide distribution, though specific export restrictions may apply based on end-use applications and destination countries.
Quality and reliability standards include comprehensive testing procedures that validate electrical performance, thermal characteristics, and long-term reliability under specified operating conditions. The device meets industry-standard quality metrics for commercial FPGA applications.
The XC4028XL-3HQ304C represents proven FPGA technology from Xilinx, delivering reliable performance for established digital design applications. While newer FPGA families offer enhanced capabilities, this device continues to serve specialized applications requiring its specific feature set and proven reliability.

