Product Overview
The XC3195-4PQ208C is a professional-grade Field Programmable Gate Array (FPGA) from the renowned XC3000 series, manufactured by Xilinx and distributed by Rochester Electronics LLC. This versatile programmable logic device delivers exceptional performance for industrial automation, telecommunications, aerospace systems, and custom embedded applications requiring flexible, high-speed digital logic integration.
As part of the legacy Xilinx FPGA family, the XC3195-4PQ208C combines proven reliability with extensive programmability, making it an ideal solution for engineers seeking to implement complex digital designs without the high costs and lengthy development cycles associated with traditional ASICs.
Technical Specifications Summary
| Specification |
Details |
| Part Number |
XC3195-4PQ208C |
| Manufacturer |
Xilinx (Now AMD Xilinx) |
| Distributor |
Rochester Electronics LLC |
| Product Family |
XC3000 Series FPGA |
| Package Type |
208-Pin PQFP (Plastic Quad Flat Pack) |
| Speed Grade |
-4 (Commercial Grade) |
| Total I/O Count |
Up to 176 user I/O pins |
| Operating Voltage |
5V CMOS Technology |
| Temperature Range |
Commercial (0°C to +70°C) |
| Technology |
High-Performance CMOS Static Memory |
| Mounting Type |
Surface Mount Technology (SMT) |
| RoHS Compliance |
Contact manufacturer for current status |
Key Features and Benefits
Advanced FPGA Architecture
The XC3195-4PQ208C features Xilinx’s proven field-programmable architecture consisting of:
- Configurable Logic Blocks (CLBs): Core array of programmable logic elements for implementing custom digital functions
- Input/Output Blocks (IOBs): Perimeter ring of configurable I/O blocks supporting multiple voltage standards
- Programmable Interconnect: Flexible routing resources connecting CLBs and IOBs
- Configuration Memory: On-chip SRAM-based configuration storage for rapid reprogramming
High-Performance Characteristics
| Performance Metric |
Specification |
| System Gate Density |
Approximately 3,000 – 5,000 equivalent gates |
| Toggle Rate |
70-325 MHz depending on design |
| Propagation Delay |
2.2 ns to 9 ns logic delays |
| Maximum System Clock |
80+ MHz internal operation |
Extensive Package Options
The 208-pin PQFP package provides:
- Compact surface-mount footprint
- Excellent thermal performance
- High pin-count for complex designs
- Industry-standard pinout compatibility
- Reliable mechanical connection
Design Capabilities and Applications
Configurable Logic Resources
The XC3195-4PQ208C provides extensive programmable resources:
- Multiple CLBs with flip-flops and combinatorial logic
- Internal 3-state bus capabilities
- On-chip register and memory elements
- TTL and CMOS input threshold compatibility
- Programmable clock distribution network
Typical Application Areas
| Industry |
Applications |
| Industrial Automation |
PLC controllers, motor control, process automation |
| Telecommunications |
Protocol converters, data routers, signal processing |
| Aerospace & Defense |
Avionics systems, radar processing, secure communications |
| Test & Measurement |
Logic analyzers, oscilloscope triggers, pattern generators |
| Medical Equipment |
Diagnostic imaging, patient monitoring, surgical instruments |
| Consumer Electronics |
Set-top boxes, digital video processing, gaming peripherals |
Technical Architecture
Configurable Logic Blocks (CLBs)
Each CLB in the XC3195 contains:
- Programmable combinational logic functions
- Storage elements (flip-flops or latches)
- Multiplexers for function selection
- Fast carry logic for arithmetic operations
- Direct interconnections between adjacent CLBs
Input/Output Block Features
| I/O Feature |
Capability |
| I/O Standards |
TTL, CMOS, LVTTL compatible |
| Output Drive |
Programmable slew rate control |
| Input Protection |
Electrostatic discharge (ESD) protection |
| Pull-up/Pull-down |
Configurable internal resistors |
| Three-State Control |
Programmable output enable |
Clock Management
The XC3195-4PQ208C includes:
- On-chip crystal oscillator amplifier
- Multiple global clock distribution networks
- Regional clock routing options
- Clock enable control for power management
Programming and Development
Design Entry Methods
Engineers can develop XC3195-4PQ208C designs using:
- Schematic Capture: Visual logic design entry
- Hardware Description Languages (HDL): VHDL or Verilog coding
- High-Level Synthesis: C/C++ to hardware conversion
- Block Diagram Entry: System-level design approach
Development Tool Support
| Tool Category |
Supported Software |
| Synthesis |
Xilinx ISE Design Suite |
| Simulation |
ModelSim, ISim, Vivado Simulator |
| Place & Route |
Xilinx implementation tools |
| Programming |
iMPACT, JTAG programmers |
| Verification |
In-circuit emulation, FPGA Editor |
Programming Interface
The device supports industry-standard configuration methods:
- JTAG boundary scan programming
- Serial configuration mode
- Parallel configuration mode
- In-system programmability (ISP)
Comparison with Other XC3000 Series Devices
| Device |
Package |
I/O Pins |
Speed Grade |
Applications |
| XC3195-4PQ208C |
208-PQFP |
176 |
-4 |
High I/O count designs |
| XC3195-4PQ160C |
160-PQFP |
128 |
-4 |
Medium complexity systems |
| XC3195-3PQ208C |
208-PQFP |
176 |
-3 |
Cost-optimized solutions |
| XC3195-5PC84C |
84-PLCC |
61 |
-5 |
Compact embedded systems |
Power Consumption Characteristics
Operating Power
| Power Parameter |
Typical Value |
| Quiescent Power |
Low static current consumption |
| Dynamic Power |
Varies with toggle rate and design |
| I/O Power |
Depends on output loading |
| Standby Power |
Minimal in unpowered state |
Power Management Features
- Programmable clock gating
- Unused logic power-down
- Low-power CMOS technology
- Efficient power distribution network
Mechanical and Thermal Specifications
Package Dimensions
The 208-pin PQFP package specifications:
- Body size: 28mm x 28mm nominal
- Package height: Thin profile for compact designs
- Lead pitch: 0.5mm fine pitch
- Seating plane coplanarity: ±0.10mm maximum
Thermal Characteristics
| Thermal Parameter |
Specification |
| Junction Temperature |
0°C to +70°C (Commercial) |
| Package Thermal Resistance |
θJA varies by PCB design |
| Recommended Heat Sink |
Optional for high-power designs |
| Airflow Requirements |
Natural or forced convection |
Quality and Reliability
Manufacturing Quality
- 100% factory pre-tested devices
- Comprehensive functional testing
- Burn-in screening available
- ISO 9001 certified manufacturing
Reliability Specifications
| Reliability Metric |
Value |
| Mean Time Between Failures (MTBF) |
>1,000,000 hours |
| Reprogramming Cycles |
Unlimited SRAM-based configuration |
| Data Retention |
Configuration held while powered |
| Operating Life |
20+ years typical |
Ordering Information
Part Number Breakdown
XC3195-4PQ208C Decoded:
- XC3195: Device family and gate count
- -4: Speed grade (commercial temperature)
- PQ208: Package type (208-pin Plastic Quad Flat Pack)
- C: Commercial temperature grade (0°C to +70°C)
Package Marking
Devices are clearly marked with:
- Xilinx logo and part number
- Speed grade and temperature range
- Date code and lot traceability
- Country of origin
Design Considerations
PCB Layout Guidelines
For optimal XC3195-4PQ208C performance:
- Use controlled impedance traces for high-speed signals
- Provide adequate power supply decoupling (0.1µF and 10µF capacitors)
- Route clock signals with minimal skew
- Maintain proper ground plane integrity
- Follow manufacturer spacing requirements
Signal Integrity Best Practices
| Design Aspect |
Recommendation |
| Power Distribution |
Multiple VCC/GND pairs with bypass capacitors |
| Clock Routing |
Minimize trace length and stub effects |
| High-Speed Signals |
Use series termination when appropriate |
| I/O Standards |
Match voltage levels to connected devices |
| EMI Reduction |
Proper grounding and shielding techniques |
Competitive Advantages
Why Choose XC3195-4PQ208C?
- Proven Technology: Decades of field reliability in critical applications
- Design Flexibility: Unlimited reprogramming enables rapid prototyping
- Cost-Effective: Eliminates NRE costs and tooling expenses of ASICs
- Time-to-Market: Faster development compared to custom IC design
- Future-Proof: In-system updates allow field upgrades
- Extensive Support: Comprehensive development tools and documentation
Comparison: FPGA vs. Traditional ASIC
| Attribute |
XC3195-4PQ208C FPGA |
Custom ASIC |
| Development Cost |
Low (tool licenses only) |
High (NRE $100K-$1M+) |
| Time to Market |
Weeks to months |
6-18 months |
| Design Changes |
Unlimited, instant |
Requires new mask set |
| Volume Economics |
Better for low-medium volume |
Better for high volume |
| Risk |
Low (modify design anytime) |
High (locked after tape-out) |
Support and Resources
Technical Documentation
Available resources for XC3195-4PQ208C:
- Complete datasheet with electrical specifications
- Application notes and design guides
- Reference designs and example code
- Programming file formats and tools
- PCB footprint libraries (CAD models)
Customer Support
Rochester Electronics provides:
- Technical engineering support
- Sample request programs
- Custom testing services
- Obsolescence management
- Global distribution network
Environmental and Compliance
Regulatory Compliance
| Standard |
Status |
| RoHS |
Contact manufacturer for current status |
| REACH |
EU chemical regulations compliance |
| Conflict Minerals |
DRC conflict-free declaration available |
| WEEE |
Proper disposal and recycling information |
Storage and Handling
- Store in moisture barrier bags with desiccant
- Baking required if moisture sensitivity level (MSL) rating exceeded
- ESD precautions mandatory during handling
- Follow IPC/JEDEC standards for PCB assembly
Frequently Asked Questions
What is the difference between speed grades?
Speed grades (-3, -4, -5) indicate the maximum operating frequency and minimum propagation delay. The XC3195-4PQ208C with speed grade -4 represents a mid-range performance option balancing speed and cost.
Can the XC3195-4PQ208C be reprogrammed?
Yes, the device uses SRAM-based configuration memory allowing unlimited reprogramming cycles. Configuration is volatile and requires reloading upon power-up.
What development tools are needed?
Xilinx ISE Design Suite (legacy version supporting XC3000 series) provides complete design entry, synthesis, implementation, and programming capabilities.
Is the XC3195-4PQ208C pin-compatible with other packages?
While the PQFP208 package has a specific pinout, Xilinx designed pin compatibility across similar package types within the XC3000 family where possible.
What is the expected lead time?
As this is a legacy device distributed by Rochester Electronics, lead times vary based on inventory availability. Contact your distributor for current stock status.
Conclusion
The XC3195-4PQ208C Field Programmable Gate Array represents a mature, reliable solution for engineers requiring programmable logic in demanding applications. With its extensive I/O capabilities, proven architecture, and flexible design methodology, this FPGA continues to serve critical roles in industrial, aerospace, telecommunications, and embedded systems.
Whether you’re upgrading legacy equipment, prototyping new designs, or seeking alternatives to custom ASICs, the XC3195-4PQ208C delivers the performance, flexibility, and reliability required for mission-critical applications. Combined with comprehensive development tool support and Rochester Electronics’ commitment to long-term device availability, this FPGA remains a trusted choice for professional engineers worldwide.
For detailed specifications, pricing, and availability of the XC3195-4PQ208C, contact Rochester Electronics LLC or authorized distributors today.
