Overview of XC2S50E-6PQG208C FPGA
The XC2S50E-6PQG208C is a powerful field-programmable gate array from the Spartan-IIE family, manufactured by Xilinx (now AMD). This advanced FPGA delivers exceptional performance with 50,000 system gates and 1,728 logic cells, making it an ideal solution for cost-sensitive applications requiring flexible, high-performance programmable logic. Built on advanced 0.15-micron technology, this device operates at 1.8V, providing optimal power efficiency for modern embedded systems.
As part of the renowned Xilinx FPGA product line, the XC2S50E-6PQG208C offers unlimited reprogrammability, making it a superior alternative to traditional mask-programmed ASICs. With its 208-pin PQFP package and 146 user I/O pins, this FPGA provides excellent connectivity options for complex digital designs.
Key Technical Specifications
Core Features and Performance
| Specification |
Value |
| Part Number |
XC2S50E-6PQG208C |
| Manufacturer |
Xilinx (AMD) |
| FPGA Family |
Spartan-IIE 1.8V |
| System Gates |
50,000 |
| Logic Cells |
1,728 |
| Configurable Logic Blocks (CLBs) |
432 |
| Maximum Frequency |
357 MHz |
| Process Technology |
0.15 μm |
| Core Voltage (VCCINT) |
1.8V |
Package and I/O Specifications
| Parameter |
Details |
| Package Type |
208-PQFP (Plastic Quad Flat Pack) |
| Total Pins |
208 |
| User I/O Pins |
146 |
| Package Dimensions |
28mm x 28mm |
| Operating Temperature Range |
Commercial: 0°C to +85°C |
| RoHS Compliance |
Yes (Lead-Free) |
Memory Configuration
| Memory Type |
Capacity |
| Distributed RAM |
32,768 bits (32 Kb) |
| Block RAM |
32,768 bits (32 Kb) |
| Total RAM |
Up to 65 Kb |
| Block RAM Configuration |
4K-bit dual-port blocks |
Advanced Features and Capabilities
Programmable Logic Architecture
The XC2S50E-6PQG208C incorporates the proven Spartan-IIE architecture, featuring:
- Hierarchical SelectRAM Memory: Combines distributed RAM (16 bits per LUT) with configurable 4K-bit true dual-port block RAM for flexible memory implementation
- Four Delay-Locked Loops (DLLs): One at each corner of the die for precise clock management and skew elimination
- Fast Predictable Interconnect: Ensures consistent timing across design iterations
- Unlimited Reprogrammability: In-system programmability enables field upgrades without hardware replacement
I/O Standards Support
The device supports 19 selectable I/O standards, including:
| I/O Standard Category |
Supported Standards |
| LVTTL/LVCMOS |
LVTTL, LVCMOS33, LVCMOS25, LVCMOS18, LVCMOS15 |
| Differential |
LVDS, RSDS, mini-LVDS |
| Bus Standards |
PCI 33MHz/66MHz, GTL, GTL+ |
| High-Speed |
HSTL Class I-IV, SSTL-2, SSTL-3 |
Clock Management System
The integrated DLL system provides:
- Clock de-skewing and phase shifting
- Frequency synthesis and multiplication
- Low-jitter clock distribution
- Multiple clock domains support
Applications and Use Cases
Industrial Automation
The XC2S50E-6PQG208C excels in industrial control systems, offering:
- Motor drive controllers with precise PWM generation
- PLC (Programmable Logic Controller) implementations
- Industrial communication protocol interfaces (PROFIBUS, Modbus, EtherCAT)
- Real-time data acquisition and processing systems
Communications Equipment
Ideal for telecommunications applications:
- Network switching and routing logic
- Protocol converters and bridges
- Wireless base station signal processing
- SDR (Software-Defined Radio) implementations
Consumer Electronics
Perfect for cost-sensitive consumer applications:
- Gaming peripherals and controllers
- Display drivers and video processors
- Audio/video signal processing
- Smart home device controllers
Automotive Electronics
Suitable for automotive applications requiring reliability:
- Body control modules
- Lighting control systems
- Sensor interface controllers
- Infotainment system logic
Design and Development Support
Configuration Methods
The XC2S50E-6PQG208C supports multiple configuration modes:
| Configuration Mode |
Description |
| Master Serial |
Reads from external serial PROM autonomously |
| Slave Serial |
Receives serial data from external controller |
| Slave Parallel |
Accepts parallel data for faster configuration |
| JTAG/Boundary Scan |
IEEE 1149.1 compliant for testing and programming |
Design Tools Compatibility
This FPGA is fully supported by:
- Xilinx ISE Design Suite (legacy support)
- Xilinx Vivado Design Suite (with compatibility modes)
- Third-party synthesis tools
- ModelSim, Questa, and other simulation platforms
Technical Advantages Over ASICs
Cost-Effectiveness
- Zero NRE costs: Eliminates expensive mask sets and fabrication setup
- Rapid prototyping: Design iterations in hours, not months
- Lower volume economics: Cost-effective for production runs from 100 to 100,000 units
Flexibility and Risk Mitigation
- Field upgradability: Update functionality post-deployment
- Design security: Eliminate risk of frozen specifications
- Future-proof designs: Adapt to changing standards and requirements
Time-to-Market Advantages
| Traditional ASIC |
XC2S50E-6PQG208C FPGA |
| 6-12 month development |
Days to weeks |
| High initial investment |
Low startup costs |
| Fixed functionality |
Unlimited reprogramming |
| Risky specification lock-in |
Flexible design evolution |
Power Management and Efficiency
Low Power Operation
The 1.8V core voltage provides significant power advantages:
- Reduced power consumption compared to 2.5V Spartan-II devices
- Lower thermal dissipation enables compact designs
- Extended battery life for portable applications
- Simplified power supply requirements
Power Supply Requirements
| Supply Rail |
Voltage |
Tolerance |
Purpose |
| VCCINT |
1.8V |
±5% |
Core logic supply |
| VCCO |
1.8V to 3.3V |
±5% |
I/O bank supply (configurable) |
| VCCAUX |
1.8V |
±5% |
Auxiliary circuits |
Quality and Reliability
Manufacturing Standards
- Built on proven 0.15-micron CMOS process technology
- Full RoHS compliance (lead-free)
- Manufactured in ISO-certified facilities
- Comprehensive quality testing and screening
Reliability Features
- ESD protection on all pins
- Latch-up immune design
- Built-in CRC checking for configuration integrity
- Hot-socket capable I/Os
Ordering Information and Package Details
Part Number Breakdown
XC2S50E-6PQG208C
- XC2S50E: Device family and size (50K gates)
- 6: Speed grade (6ns delay)
- PQG208: Package type (Plastic Quad with Gold plating, 208 pins)
- C: Commercial temperature range
Pin Configuration
The 208-pin PQFP package provides:
- 146 user-configurable I/O pins
- 8 I/O banks for flexible voltage assignment
- 4 dedicated global clock inputs
- Multiple VCCO and VCCINT power pins for stable operation
- Ground pins strategically distributed for optimal signal integrity
Comparison with Related Products
Spartan-IIE Family Comparison
| Device |
System Gates |
Logic Cells |
Block RAM |
User I/Os |
Package Options |
| XC2S50E |
50,000 |
1,728 |
32 Kb |
146-182 |
TQ144, PQ208, FT256 |
| XC2S100E |
100,000 |
2,700 |
40 Kb |
146-202 |
PQ208, FT256 |
| XC2S150E |
150,000 |
3,888 |
72 Kb |
182-265 |
FT256, FG456 |
| XC2S200E |
200,000 |
5,292 |
56 Kb |
182-265 |
PQ208, FT256, FG456 |
Frequently Asked Questions
What is the maximum operating frequency?
The XC2S50E-6PQG208C supports system performance beyond 200 MHz, with internal logic capable of 357 MHz operation depending on design complexity and routing.
Is this device compatible with 3.3V logic?
Yes, the I/O banks can be configured for 3.3V LVTTL/LVCMOS operation while maintaining the 1.8V core voltage for optimal power efficiency.
What development tools are required?
You’ll need Xilinx ISE Design Suite or compatible FPGA development tools, along with a JTAG programmer for device configuration and debugging.
Can this FPGA replace an existing ASIC design?
Absolutely. The Spartan-IIE family is specifically designed as an ASIC replacement, offering greater flexibility, lower risk, and faster time-to-market at competitive costs for medium to high-volume production.
What is the difference between XC2S50E and XC2S50?
The “E” designation indicates the enhanced Spartan-IIE family, which operates at 1.8V instead of 2.5V, uses 0.15μm technology (vs 0.18μm), and offers improved performance and lower power consumption.
Conclusion: Why Choose XC2S50E-6PQG208C
The XC2S50E-6PQG208C represents an excellent balance of performance, cost, and flexibility for modern digital designs. With 50,000 system gates, advanced clock management, comprehensive I/O standard support, and the proven Spartan-IIE architecture, this FPGA delivers reliable performance for industrial, communications, consumer, and automotive applications.
Its 1.8V operation, RoHS compliance, and unlimited reprogrammability make it an ideal choice for engineers seeking a cost-effective, future-proof solution. Whether you’re replacing an aging ASIC design, prototyping a new product, or seeking a flexible platform for evolving specifications, the XC2S50E-6PQG208C provides the capabilities and reliability your project demands.
For more information about Xilinx FPGA products and comprehensive technical resources, visit our Xilinx FPGA product page.
