The XC4028EX-4HQ208C is a high-performance Field Programmable Gate Array (FPGA) from Xilinx’s renowned XC4000E family. This 28K gate FPGA delivers exceptional programmable logic capabilities with 2,432 logic cells in a compact 208-pin HSPQFP (Heat Sink Plastic Quad Flat Pack) package. Designed for embedded systems and complex digital applications, the XC4028EX-4HQ208C combines advanced SRAM-based architecture with robust performance characteristics.
Product Specifications
Core Technical Specifications
- Part Number: XC4028EX-4HQ208C
- Manufacturer: Xilinx Inc.
- Product Family: XC4000E Series FPGA
- Logic Capacity: 28,000 gates equivalent
- Logic Cells: 2,432 configurable logic blocks
- Technology Node: 0.5ฮผm three-layer metal CMOS process
- Supply Voltage: 5V operation
- Package Type: 208-Pin HSPQFP (Heat Sink Plastic Quad Flat Pack)
- Speed Grade: -4 (Commercial temperature range)
- Operating Temperature: 0ยฐC to +70ยฐC (Commercial grade)
Architecture Features
- SRAM-Based Configuration: Reprogrammable architecture with unlimited reconfiguration cycles
- VersaBlock Logic Modules: Advanced configurable logic blocks with enhanced functionality
- VersaRing I/O Interface: Innovative I/O architecture providing high logic-to-I/O ratio
- Routing Resources: Rich hierarchy of interconnect resources for optimal signal routing
- Select-RAM Memory: On-chip memory with edge-triggered and dual-port modes
- Programmable Output Control: Variable slew-rate control for noise reduction and performance optimization
Performance Characteristics
- Maximum System Clock: Up to 80 MHz synchronous operation
- Internal Performance: Exceeds 150 MHz for internal logic operations
- I/O Pins: Up to 160 user I/O pins available
- Zero Hold Time: Simplified system timing with zero flip-flop hold time for input registers
Price Information
Current Market Pricing
The XC4028EX-4HQ208C is classified as an obsolete component by the original manufacturer, making it available primarily through specialized distributors and component brokers. Pricing varies significantly based on supplier, quantity, and condition:
- Small Quantity (1-10 units): $85-$150 per unit
- Medium Quantity (11-100 units): $65-$120 per unit
- Large Quantity (100+ units): Contact distributors for volume pricing
- Refurbished/Used Units: $35-$75 per unit
Note: Prices fluctuate based on availability and market demand. For current pricing and stock availability, contact authorized distributors or component specialists.
Cost Considerations
- Original factory pricing is no longer available due to product discontinuation
- Premium pricing may apply due to limited availability
- Lead times can vary from immediate stock to several weeks for sourcing
- Consider equivalent modern alternatives for new designs
Documents & Media
Technical Documentation
- Official Datasheet: XC4000E Family Data Sheet (Xilinx DS015)
- User Guide: XC4000E Series Configuration Guide
- Application Notes:
- XAPP052: Using the XC4000E Select-RAM Feature
- XAPP063: Boundary Scan in XC4000E Devices
- XAPP075: XC4000E Timing and Performance
Software Support
- Development Tools: Xilinx ISE Design Suite (Legacy support)
- Design Entry: Schematic capture, VHDL, Verilog HDL synthesis
- Synthesis Tools: Compatible with ABEL, Synopsis, and other third-party tools
- Simulation: ModelSim, ViewSim, and other VHDL/Verilog simulators
Package and Pinout Information
- Package Outline: 208-pin HSPQFP mechanical drawings
- Pinout Diagrams: Complete pin assignment documentation
- Thermal Characteristics: Junction-to-ambient thermal resistance specifications
- PCB Layout Guidelines: Recommended footprint and routing practices
Related Resources
Compatible Products and Alternatives
- Pin-Compatible Devices: XC4028XL, XC4025E (similar footprint)
- Functional Equivalents: XC4036XL, XC4044XL (higher capacity alternatives)
- Modern Replacements: Spartan-3E, Spartan-6 families for new designs
Development Resources
- Evaluation Boards: Legacy XC4000E development kits (limited availability)
- Reference Designs: Application-specific design examples
- Third-Party Tools: Compatible CAD tools and IP cores
- Technical Support: Community forums and legacy documentation archives
Design Migration Support
- Upgrade Paths: Migration guidelines to current Xilinx FPGA families
- Design Conversion: Tools for converting XC4000E designs to modern architectures
- Legacy Support: Resources for maintaining existing XC4028EX-based systems
Training and Educational Materials
- Application Notes: Comprehensive design methodology documentation
- Video Tutorials: Legacy training materials for XC4000E family
- University Programs: Educational resources for FPGA design courses
- Design Examples: Reference implementations and starter projects
Environmental & Export Classifications
Environmental Compliance
- RoHS Compliance: Not RoHS compliant (legacy product predating regulations)
- REACH Compliance: Contains substances of concern under REACH regulation
- Environmental Status: End-of-life product with limited environmental certifications
- Disposal Guidelines: Follow local e-waste regulations for proper disposal
Export Control Classifications
- ECCN (Export Control Classification Number): 3A001.a.7
- HTS (Harmonized Tariff Schedule): 8542.31.0001
- Country of Origin: Manufactured in various locations (Malaysia, Philippines)
- Export Restrictions: Subject to US Department of Commerce export regulations
Quality and Reliability Standards
- Quality Grade: Commercial temperature range (-4 speed grade)
- Reliability Testing: Meets Xilinx standard reliability specifications
- Package Specifications: JEDEC standard 208-pin HSPQFP outline
- Moisture Sensitivity: Level 3 (168 hours at 30ยฐC/60% RH after bag opening)
Regulatory Certifications
- FCC Part 15: Meets requirements for digital devices (when properly implemented)
- CE Marking: Compliant when used in conforming end products
- Industry Standards: Meets applicable JEDEC and IPC standards
- Military Specifications: Commercial grade only (no military temperature range available)
Important Notice: The XC4028EX-4HQ208C is an obsolete product that is no longer in active production. While still available through distributors, Xilinx recommends migrating to current FPGA families for new designs. Contact authorized Xilinx distributors for availability, pricing, and technical support for legacy systems requiring this specific component.
