The XC4028XL-3BG256C is a high-performance Field Programmable Gate Array (FPGA) from the legacy Xilinx XC4000X family, designed to deliver robust programmable logic solutions for embedded systems and digital signal processing applications. This versatile FPGA combines proven architecture with reliable performance for cost-sensitive applications.
Product Specifications
Core Architecture
- Family: XC4000X Series Field Programmable Gate Array
- Technology Node: 0.35ฮผm three-layer metal CMOS process
- System Gates: 28,000 equivalent gates
- Logic Cells: 2,432 configurable logic cells
- Architecture: SRAM-based reprogrammable with VersaBlock logic modules
Electrical Characteristics
- Supply Voltage: 3.3V ยฑ10% (3.0V – 3.6V)
- Operating Temperature Range: Commercial grade (0ยฐC to +85ยฐC)
- Speed Grade: -3 (standard performance)
- Maximum System Clock: Up to 80 MHz synchronous operation
- Internal Performance: Exceeds 150 MHz for optimized paths
Package Details
- Package Type: BG256 – 256-pin Ball Grid Array (BGA)
- Pin Count: 256 pins total
- I/O Pins: Up to 244 user I/O signals available
- Package Dimensions: Industry-standard BGA footprint
- Lead-Free: RoHS compliant packaging
Memory and Resources
- Total RAM Bits: 32,768 bits of distributed RAM
- Number of CLBs: 1,024 Configurable Logic Blocks
- Select-RAM: Dedicated memory blocks for data storage
- Flip-Flops: Zero hold time for input registers
- Routing Resources: VersaRing I/O interface with hierarchical interconnect
Performance Features
- Programmable Slew Rate Control: Optimized signal integrity and noise reduction
- High-Speed Clock Buffers: Dedicated clock distribution network
- VersaRing I/O Interface: High logic cell to I/O ratio optimization
- Register/Latch Rich Architecture: Enhanced sequential logic capabilities
Price Information
Market Pricing for XC4028XL-3BG256C:
- Small quantities (1-10 units): Contact authorized distributors for current pricing
- Volume pricing (100+ units): Significant discounts available through bulk purchasing
- Note: Due to semiconductor shortages from 2021, current pricing varies significantly from pre-2021 levels
Pricing Factors:
- Legacy product status may affect availability and pricing
- Market demand for vintage FPGA components
- Authorized distributor vs. surplus inventory pricing
- Volume commitment and lead times
Documents & Media
Technical Documentation
- Official Datasheet: XC4000E and XC4000X Series Field Programmable Gate Arrays specification
- User Guide: XC4028XL User Guide with detailed implementation guidelines
- Package Specifications: BG256 mechanical drawings and thermal characteristics
- Application Notes: Design optimization and best practices documentation
Development Resources
- Design Software: Xilinx ISE Design Suite compatibility (legacy support)
- Programming Tools: Standard JTAG and configuration interfaces
- Simulation Models: VHDL and Verilog behavioral models available
- Reference Designs: Sample implementations and design templates
Pin Configuration
- Pinout Diagrams: Complete BG256 ball assignment documentation
- I/O Standards: TTL and CMOS compatible I/O buffers
- Power Supply Pins: Dedicated VCC, GND, and configuration pin assignments
Related Resources
Design Tools and Software
- Legacy CAD Support: Xilinx ISE Design Suite for synthesis and implementation
- HDL Support: VHDL, Verilog, and schematic entry methods
- Simulation: ModelSim and other industry-standard simulators
- Programming: iMPACT and other Xilinx configuration tools
Compatible Components
- Pin-Compatible Devices: XC4025, XC4025E, XC4028EX equivalent array size devices
- Family Variants: Other XC4000X series devices with different gate counts
- Development Boards: Third-party evaluation and prototyping platforms
- Configuration Memory: Compatible PROM and flash memory devices
Application Areas
- Digital Signal Processing: Real-time signal processing applications
- Communications: Protocol processing and interface bridging
- Industrial Control: Motor control and automation systems
- Legacy System Maintenance: Replacement for discontinued components
Technical Support
- Community Forums: FPGA design communities and legacy device support
- Application Engineering: Xilinx/AMD legacy product support channels
- Third-Party Support: Independent FPGA design consultants and services
- Training Resources: FPGA design methodology and best practices documentation
Environmental & Export Classifications
Environmental Compliance
- RoHS Compliance: Lead-free package construction meets RoHS directives
- WEEE Compliance: Proper disposal and recycling guidelines available
- REACH Regulation: Compliant with European chemical safety standards
- Conflict Minerals: Responsibly sourced materials in manufacturing
Operating Environment
- Storage Temperature: -65ยฐC to +150ยฐC
- Humidity: 85% RH non-condensing maximum
- Altitude: Sea level to 2000 meters operational
- Vibration/Shock: MIL-STD-883 qualified for rugged applications
Export Classifications
- ECCN (Export Control Classification Number): 3A001.a.7 – Electronics technology
- HTS Code: 8542.33.0001 – Electronic integrated circuits
- Country of Origin: Manufactured in Xilinx/AMD qualified facilities
- Export License: May require export license for certain destinations
Quality Standards
- Manufacturing Standards: ISO 9001 certified production facilities
- Reliability Testing: Automotive-grade qualification testing available
- MSL Rating: Moisture Sensitivity Level classification for handling
- Traceability: Full lot traceability and certificate of compliance available
Regulatory Approvals
- FCC Compliance: Meets electromagnetic compatibility requirements
- CE Marking: European conformity for electronic equipment
- UL Recognition: Safety standards compliance for commercial applications
- Military Standards: MIL-STD-883 qualification available for defense applications
The XC4028XL-3BG256C represents proven FPGA technology ideal for legacy system support and cost-effective programmable logic implementations. Contact authorized distributors for current availability, pricing, and technical support.
