Overview of XC3042-100PG84C Field Programmable Gate Array
The XC3042-100PG84C is a versatile Field Programmable Gate Array (FPGA) from AMD Xilinx’s acclaimed XC3000 Logic Cell Array family. This high-density programmable logic device features 144 configurable logic blocks (CLBs) and operates at speeds up to 100MHz, making it an ideal solution for custom VLSI design applications. With its 84-pin plastic grid array (PGA) package, the XC3042-100PG84C offers exceptional flexibility for digital circuit implementation across industrial, commercial, and embedded system applications.
Key Technical Specifications
Core Performance Specifications
| Parameter |
Value |
| Part Number |
XC3042-100PG84C |
| Manufacturer |
AMD Xilinx (formerly Xilinx) |
| Product Family |
XC3000 Series FPGAs |
| Logic Gates |
3,000 equivalent gates |
| Configurable Logic Blocks (CLBs) |
144 CLBs |
| Maximum Operating Frequency |
100MHz |
| Supply Voltage |
5V |
| Package Type |
84-Pin CPGA (Ceramic Pin Grid Array) |
| Technology |
CMOS |
| Operating Temperature Range |
Commercial (0°C to +70°C) |
| Speed Grade |
-100 |
Memory and Architecture Details
| Feature |
Description |
| Architecture |
Logic Cell Array (LCA) |
| Configuration Memory |
Static RAM-based |
| User I/O Pins |
Up to 42 configurable I/O blocks |
| Flip-Flops |
288 available flip-flops |
| Configuration Data Size |
Approximately 2,000 to 3,000 bits |
| Routing Resources |
Programmable interconnect matrix |
What Makes XC3042-100PG84C Special?
Advanced FPGA Architecture
The XC3042-100PG84C employs a sophisticated Logic Cell Array architecture consisting of three primary configurable elements:
- Configurable Logic Blocks (CLBs): 144 CLBs provide the core computational capability
- Input/Output Blocks (IOBs): Programmable interface around the perimeter for flexible connectivity
- Programmable Interconnect: Extensive routing resources enabling complex signal paths
Programmability and Flexibility
This Xilinx FPGA offers unmatched design flexibility through its SRAM-based configuration, allowing for:
- Rapid prototyping with unlimited reprogrammability
- In-system reconfiguration for adaptive applications
- Multiple configuration modes including master, slave, and peripheral
- Design iteration without hardware changes
Performance Characteristics
| Timing Parameter |
Specification |
| Combinatorial Delay |
10ns typical |
| Clock-to-Output Delay |
12ns maximum |
| Setup Time |
5ns typical |
| Hold Time |
0ns typical |
| Global Clock Distribution |
Low-skew clock network |
| Toggle Rate |
Up to 100MHz flip-flop operation |
Applications and Use Cases
Industrial Control Systems
The XC3042-100PG84C excels in industrial automation applications:
- Programmable logic controllers (PLCs)
- Motor control circuits
- Sensor interfacing and data acquisition
- Process monitoring systems
- Industrial communication protocols
Embedded System Development
Ideal for embedded applications requiring:
- Custom peripheral controllers
- Protocol converters
- State machine implementations
- Digital signal processing functions
- System-on-chip (SoC) glue logic
Communication Equipment
Perfect for telecommunications infrastructure:
- Data encoding/decoding
- Protocol translation
- Interface bridging
- Custom communication controllers
Legacy System Upgrades
An excellent choice for:
- Replacing obsolete TTL and MSI logic
- Consolidating multiple discrete components
- Modernizing existing designs
- Reducing board space and power consumption
Technical Advantages
Development Tool Support
| Tool/Feature |
Capability |
| XACT Development System |
Complete design entry environment |
| Schematic Capture |
Visual design entry |
| Auto Place-and-Route |
Automated design implementation |
| Logic Simulation |
Pre-implementation verification |
| Timing Simulation |
Post-layout timing analysis |
| In-Circuit Emulation |
Real-time design validation |
Configuration Options
The XC3042-100PG84C supports multiple configuration modes:
- Master Serial Mode: Direct configuration from PROM
- Slave Serial Mode: Configuration from external controller
- Peripheral Mode: Configuration via microprocessor interface
- Daisy-Chain Configuration: Multiple device programming
Pin Configuration and Package Details
84-Pin CPGA Package Features
| Package Aspect |
Details |
| Total Pins |
84 pins |
| User I/O Available |
Up to 42 pins |
| Power Pins (VCC) |
Multiple distributed |
| Ground Pins (GND) |
Multiple distributed |
| Dedicated Configuration Pins |
Mode pins (M0, M1, M2) |
| Package Material |
Ceramic for reliability |
| Mounting Style |
Through-hole PGA |
Special Function Pins
- DONE: Configuration complete indicator
- INIT: Initialization control
- PROGRAM: Configuration initiation
- CCLK: Configuration clock
- DIN: Data input during configuration
Electrical Characteristics
Power Consumption
| Operating Mode |
Current Specification |
| Active Power (Typical) |
0.25mW per MHz |
| Standby Current |
Low power CMOS design |
| Dynamic Power |
Depends on toggle rate and utilization |
DC Specifications
| Parameter |
Min |
Typ |
Max |
| VCC Supply Voltage |
4.75V |
5.0V |
5.25V |
| Input High Voltage (VIH) |
2.0V |
– |
VCC |
| Input Low Voltage (VIL) |
GND |
– |
0.8V |
| Output High Voltage (VOH) |
2.4V |
– |
– |
| Output Low Voltage (VOL) |
– |
– |
0.4V |
Design Implementation Guide
Getting Started with XC3042-100PG84C
- Design Entry: Use schematic capture or HDL (VHDL/Verilog)
- Synthesis: Convert design to logic gates
- Place and Route: Map logic to CLBs and routing resources
- Timing Analysis: Verify performance requirements
- Configuration File Generation: Create programming bitstream
- Device Programming: Load configuration via selected mode
Best Practices
- Utilize global clock resources for synchronous designs
- Implement proper I/O constraints for signal integrity
- Consider flip-flop packing for area optimization
- Use dedicated carry chains for arithmetic operations
- Implement pull-up resistors on unused I/Os
Comparison with Related Devices
XC3000 Family Comparison
| Device |
CLBs |
Gates |
Speed |
Best For |
| XC3020 |
64 |
2,000 |
50-125MHz |
Small designs |
| XC3030 |
100 |
2,500 |
50-125MHz |
Medium complexity |
| XC3042 |
144 |
3,000 |
50-125MHz |
Balanced performance |
| XC3064 |
224 |
5,000 |
50-125MHz |
Large designs |
| XC3090 |
320 |
7,000 |
50-125MHz |
Complex systems |
Quality and Reliability
Manufacturing Standards
- Commercial-grade temperature rating
- Comprehensive device testing
- Quality assurance per industry standards
- Long-term product availability support
Reliability Features
- Proven CMOS technology
- Radiation-tolerant design options available
- Extensive qualification testing
- Field-proven reliability track record
Ordering Information and Availability
Part Number Breakdown
XC3042-100PG84C
- XC3042: Device family and size (144 CLBs)
- 100: Speed grade (100MHz maximum)
- PG84: Package type (84-pin PGA)
- C: Commercial temperature range
Package Marking
Device packages include:
- Part number
- Speed grade
- Date code
- Country of origin
- Lot traceability code
Support and Resources
Development Resources
- Complete datasheet documentation
- Application notes and design guides
- Reference designs and example projects
- Technical support from AMD Xilinx
- Online design community and forums
Migration Path
The XC3042-100PG84C offers straightforward migration to:
- XC3300 Series: HardWire mask-programmed alternatives for high volume
- Newer FPGA Families: Upgrade path to advanced architectures
- Pin-compatible variants: Different speed grades and temperature ranges
Why Choose XC3042-100PG84C?
Proven Technology
With decades of successful deployments, the XC3000 series represents mature, reliable FPGA technology trusted by engineers worldwide.
Cost-Effective Solution
- Competitive pricing for mid-density applications
- Reduces overall BOM cost by replacing multiple components
- Lower NRE costs compared to ASIC development
- Eliminates tooling and mask costs
Design Security
- Configuration data can be encrypted
- Anti-tamper features available
- Bitstream protection options
- Secure supply chain from authorized distributors
Technical Support
AMD Xilinx provides comprehensive support including:
- Technical documentation library
- Design consultation services
- Software tool updates
- Online knowledge base
Frequently Asked Questions
What is the difference between XC3042-100PG84C and XC3042-100PC84C?
The main difference is the package type: PG84C uses a ceramic pin grid array (CPGA) while PC84C uses a plastic leaded chip carrier (PLCC). The CPGA offers better thermal performance and reliability.
Can the XC3042-100PG84C be reprogrammed?
Yes, this SRAM-based FPGA can be reprogrammed unlimited times, making it ideal for prototyping and applications requiring field updates.
What development tools are compatible?
The device is supported by Xilinx XACT development system and can be programmed using various third-party tools supporting Xilinx configuration formats.
Is this device suitable for new designs?
While classified as a legacy product, the XC3042-100PG84C remains suitable for cost-sensitive applications, legacy system maintenance, and educational purposes.
Conclusion
The XC3042-100PG84C delivers reliable, flexible programmable logic performance in a proven architecture. With 144 configurable logic blocks, 100MHz operation, and comprehensive development tool support, this Xilinx FPGA continues to serve diverse applications from industrial control to embedded systems. Its balance of density, performance, and cost makes it an enduring choice for engineers seeking programmable logic solutions.
Whether upgrading legacy designs, prototyping new concepts, or implementing custom digital logic, the XC3042-100PG84C provides the versatility and performance needed for successful FPGA implementations.
