Overview of the XC3042A-7PQ100C Field Programmable Gate Array

The XC3042A-7PQ100C is a legacy yet reliable Field Programmable Gate Array (FPGA) manufactured by AMD (formerly Xilinx Inc.). This component belongs to the renowned XC3000A/L family and delivers exceptional programmable logic capabilities for various digital circuit implementations. Despite being classified as an obsolete product, the XC3042A-7PQ100C remains highly sought after for maintenance, repair, and legacy system support applications.

This comprehensive guide explores the technical specifications, applications, and purchasing considerations for the XC3042A-7PQ100C FPGA, helping engineers and procurement specialists make informed decisions.

Technical Specifications Table

Key Features and Benefits

Advanced Programmable Architecture

The XC3042A-7PQ100C features a flexible, user-programmable array architecture that consists of three main configurable elements:

• Configurable Logic Blocks (CLBs): 144 cells providing versatile logic implementation
• Input/Output Blocks (IOBs): 82 I/O pins for peripheral interface
• Interconnect Resources: Comprehensive routing matrix for signal distribution
• Configuration Memory: Non-volatile program storage for design retention

High-Speed Performance Characteristics

Operating at speeds up to 113 MHz, this Xilinx FPGA delivers solid performance for time-critical applications in industrial control systems, telecommunications equipment, and embedded computing platforms.

Industry-Standard Package

The 100-pin PQFP package offers an optimal balance between I/O density and PCB footprint, making it suitable for space-constrained designs while maintaining excellent thermal characteristics and manufacturability.

Performance Specifications Table

Applications and Use Cases

Industrial Automation and Control

The XC3042A-7PQ100C excels in industrial environments requiring:

• Motor control systems
• PLC (Programmable Logic Controller) replacements
• Sensor interface circuits
• Real-time monitoring systems
• Process automation controllers

Legacy System Maintenance

With many systems still relying on XC3000-series FPGAs, the XC3042A-7PQ100C serves critical roles in:

• Equipment repair and refurbishment
• Spare parts inventory management
• Military and aerospace legacy systems
• Medical device maintenance
• Telecommunications infrastructure upgrades

Embedded System Development

Engineers leverage this FPGA for:

• Custom digital logic implementation
• Prototyping and proof-of-concept designs
• Educational and training purposes
• Interface bridging applications
• Glue logic replacement

Pin Configuration and Package Details

PQFP-100 Package Dimensions

Pin Assignment Overview

The XC3042A-7PQ100C allocates its 100 pins across several functional categories:

• User I/O Pins: 82 configurable input/output connections
• Power Pins (VCC): Multiple 5V supply pins for power distribution
• Ground Pins (GND): Multiple ground connections for noise immunity
• Configuration Pins: Dedicated programming and configuration interface
• Clock Inputs: Global and local clock distribution networks

Electrical Characteristics

Absolute Maximum Ratings

Recommended Operating Conditions

Design Considerations and Implementation

Development Tools and Software

Successful implementation of the XC3042A-7PQ100C requires appropriate development tools:

• Xilinx ISE (Integrated Software Environment): Legacy design suite supporting XC3000 series
• Schematic Capture Tools: For graphical design entry
• VHDL/Verilog Support: Hardware description language synthesis
• Place and Route: Automatic resource allocation and optimization
• Timing Analysis: Performance verification tools
• Programming Utilities: Device configuration software

Design Best Practices

When working with the XC3042A-7PQ100C, engineers should consider:

1. Power Supply Decoupling: Place 0.1µF ceramic capacitors near each VCC pin
2. Clock Distribution: Utilize dedicated global clock resources for timing-critical signals
3. I/O Standards: Ensure compatibility with 5V TTL/CMOS logic levels
4. Thermal Management: Provide adequate airflow or heatsinking for high-utilization designs
5. Configuration Strategy: Select appropriate programming mode (Master/Slave Serial, Parallel)

Migration and Replacement Options

For new designs or obsolescence management, consider modern alternatives:

• Spartan Series: Pin-compatible upgrades with enhanced features
• Artix-7 Family: Contemporary FPGAs with superior performance
• CPLD Solutions: For simpler logic requirements
• Modern Xilinx Devices: Enhanced power efficiency and higher density

Comparison with Similar FPGA Models

Purchasing and Availability Information

Current Market Status

The XC3042A-7PQ100C is classified as an obsolete component by AMD/Xilinx, meaning:

• No longer in active production
• Available through authorized distributors’ remaining inventory
• Sourced from electronic component brokers and surplus suppliers
• Subject to long lead times and price variability
• Recommended for maintenance use only, not new design starts

Where to Buy XC3042A-7PQ100C

Authorized distributors and reliable suppliers include:

• Digi-Key Electronics (Part #: 122-1026-ND)
• Mouser Electronics
• Independent distributors specializing in obsolete components
• Electronic component marketplaces
• Authorized surplus dealers

Quality and Authentication Considerations

When purchasing legacy components like the XC3042A-7PQ100C, verify:

• Authentic Manufacturer Markings: Confirm Xilinx/AMD branding
• Date Codes: Check manufacturing date for storage reliability
• Package Condition: Inspect for physical damage or corrosion
• Supplier Reputation: Choose authorized or well-established vendors
• Testing Certificates: Request functional testing documentation when available
• Traceability: Ensure proper chain-of-custody documentation

Storage and Handling Guidelines

Proper Storage Conditions

To maintain component reliability:

• Store in moisture-barrier bags with desiccant
• Maintain temperature: 5°C to 30°C
• Relative humidity: <60%
• Protect from electrostatic discharge (ESD)
• Avoid direct sunlight and UV exposure
• Use moisture-sensitive level (MSL) appropriate handling

ESD Protection Requirements

The XC3042A-7PQ100C is sensitive to electrostatic discharge:

• Use ESD-safe workstations and equipment
• Wear properly grounded wrist straps
• Store in conductive or dissipative packaging
• Follow ANSI/ESD S20.20 handling procedures
• Implement proper grounding protocols

Technical Support and Resources

Documentation Access

Engineers working with the XC3042A-7PQ100C should reference:

• Product datasheet (available from legacy Xilinx archives)
• XC3000 series user guide
• Application notes for specific implementations
• Configuration guide and programming specifications
• Pin-out diagrams and package drawings

Community and Forum Support

For technical questions and design assistance:

• Xilinx Community Forums (legacy FPGA section)
• Engineering discussion boards
• Electronics Stack Exchange
• LinkedIn professional groups
• University FPGA research communities

Environmental and Compliance Information

RoHS Compliance Status

The XC3042A-7PQ100C was manufactured before RoHS directives:

• May contain lead in solder and package materials
• Not suitable for RoHS-compliant production
• Exemptions may apply for maintenance and repair applications
• Check regional regulations for specific compliance requirements

Disposal and Recycling

Proper end-of-life handling includes:

• Follow local electronic waste regulations
• Use certified e-waste recyclers
• Consider component harvesting for education/testing
• Document disposal for compliance tracking

Frequently Asked Questions

Is the XC3042A-7PQ100C suitable for new product designs?

No, this FPGA is obsolete and not recommended for new designs. Modern alternatives offer superior performance, lower power consumption, and guaranteed long-term availability.

What programming methods are supported?

The XC3042A-7PQ100C supports several configuration modes including Master Serial, Slave Serial, Master Parallel, Slave Parallel, and Peripheral modes through dedicated configuration pins.

Can this FPGA be reprogrammed?

Yes, the device is reprogrammable and supports in-system reconfiguration through appropriate programming interfaces compatible with Xilinx legacy programming tools.

What is the typical power consumption?

Power consumption varies based on design utilization and clock frequency. Refer to the datasheet for detailed power calculations and typical values for your specific implementation.

Are there pin-compatible replacements available?

Some newer Xilinx devices may offer functional compatibility, but direct pin-for-pin replacements are limited. Consult migration guides for recommended modern alternatives.

Conclusion: Maximizing Value from the XC3042A-7PQ100C

The XC3042A-7PQ100C represents a proven FPGA solution for legacy system support, maintenance applications, and educational purposes. While no longer recommended for new designs, its reliable performance and established design methodology make it valuable for organizations maintaining existing equipment.

When sourcing this component, prioritize authorized suppliers, verify authenticity, and consider long-term availability for critical applications. For new projects, explore modern Xilinx FPGA families that deliver enhanced performance, reduced power consumption, and assured long-term support.

Whether you’re maintaining legacy systems, supporting existing products, or exploring FPGA technology for educational purposes, understanding the capabilities and limitations of the XC3042A-7PQ100C ensures successful implementation and reliable operation.