The XCS40-3PQ208C is a high-performance Field Programmable Gate Array (FPGA) from the renowned Xilinx Spartan family. This 5V programmable logic device delivers exceptional value for embedded systems, industrial automation, telecommunications, and digital signal processing applications. As a cost-effective ASIC replacement solution, the XCS40-3PQ208C offers up to 40,000 system gates with unlimited reprogrammability.
XCS40-3PQ208C Key Specifications Overview
| Parameter |
Specification |
| Manufacturer |
Xilinx (now AMD) |
| Product Family |
Spartan FPGA Series |
| Part Number |
XCS40-3PQ208C |
| Device Type |
Field Programmable Gate Array (FPGA) |
| System Gates |
40,000 (40K Gates) |
| Logic Cells |
1,862 |
| Maximum Frequency |
125 MHz |
| Supply Voltage |
5V |
| Package Type |
208-PQFP (Plastic Quad Flat Pack) |
Detailed Technical Parameters for XCS40-3PQ208C Programmable Logic Device
Logic Architecture Specifications
| Feature |
Value |
| Configurable Logic Blocks (CLBs) |
784 |
| Logic Cells |
1,862 |
| Typical Gate Count |
13,000 Gates |
| Maximum System Gates |
40,000 Gates |
| Distributed RAM Bits |
25,088 |
| Look-Up Tables (LUTs) |
3 per CLB |
| Flip-Flops per CLB |
2 |
I/O and Package Characteristics
| Parameter |
Specification |
| User I/O Pins |
169 |
| Total Pin Count |
208 Pins |
| Package Dimensions |
28mm × 28mm |
| Package Style |
PQFP / BFQFP |
| Mounting Type |
Surface Mount (SMD) |
| Lead Pitch |
0.5mm |
Operating Conditions and Environmental Specifications
| Condition |
Range |
| Operating Temperature |
0°C to +85°C (Commercial Grade) |
| Junction Temperature (TJ) |
0°C to +85°C |
| Supply Voltage (VCC) |
5V (±5%) |
| Technology |
CMOS |
| Speed Grade |
-3 |
XCS40-3PQ208C Spartan FPGA Architecture Features
Configurable Logic Block (CLB) Structure
The XCS40-3PQ208C utilizes Xilinx’s proven Spartan CLB architecture with three lookup tables (LUTs) per block serving as logic function generators. Each CLB contains two flip-flops and multiple signal steering multiplexers, enabling implementation of complex logic functions up to nine inputs including parity checking operations.
On-Chip Memory Capabilities
| Memory Feature |
Specification |
| Distributed RAM |
Yes |
| RAM Configuration |
CLB-based |
| Total RAM Bits |
25,088 bits |
| RAM Usage |
20-30% of CLBs usable as RAM |
Interconnect and Routing Resources
The device features a powerful hierarchy of routing resources including single-length lines, double-length lines, and longlines. The VersaRing perimeter routing provides additional flexibility for I/O connections. Programmable Switch Matrices (PSMs) enable optimal signal routing throughout the FPGA fabric.
XCS40-3PQ208C Interface and Configuration Features
JTAG Boundary Scan Support
| JTAG Feature |
Support Status |
| IEEE 1149.1 Compliance |
Full Support |
| Boundary Scan Testing |
Yes |
| In-System Programming |
Yes |
| IDCODE Register |
Supported |
| EXTEST |
Supported |
| SAMPLE/PRELOAD |
Supported |
Configuration Modes
| Mode |
Description |
| Master Serial |
FPGA generates configuration clock |
| Slave Serial |
External source provides clock |
| Slave Parallel |
Byte-wide configuration |
| JTAG Configuration |
Programming via boundary scan |
I/O Standards and Compatibility
| I/O Feature |
Specification |
| Input Threshold |
Configurable TTL (1.2V) or CMOS (VCC/2) |
| Output Drive |
Programmable |
| 3.3V Device Compatibility |
Yes (TTL mode input) |
| Slew Rate Control |
Programmable |
Ordering Information and Part Number Decode
XCS40-3PQ208C Part Number Breakdown
| Code Element |
Meaning |
| XCS |
Xilinx Spartan Family |
| 40 |
40K System Gates |
| -3 |
Speed Grade -3 |
| PQ |
Plastic Quad Flat Package |
| 208 |
208 Pin Count |
| C |
Commercial Temperature Range (0°C to +85°C) |
Related Part Numbers in the XCS40 Series
| Part Number |
Speed Grade |
Temperature Range |
| XCS40-3PQ208C |
-3 |
Commercial (0°C to +85°C) |
| XCS40-3PQ208I |
-3 |
Industrial (-40°C to +100°C) |
| XCS40-4PQ208C |
-4 |
Commercial (0°C to +85°C) |
| XCS40-4VQ280C |
-4 |
Commercial, VQ280 Package |
Applications for XCS40-3PQ208C FPGA
The Xilinx Spartan XCS40-3PQ208C is ideal for a wide range of applications:
Industrial and Automation
- Programmable Logic Controller (PLC) implementations
- Motor control systems
- Industrial networking interfaces
- Process automation equipment
Communications and Networking
- Protocol conversion bridges
- Data encryption modules
- Communication interface controllers
- Network packet processing
Consumer Electronics
- Display controllers
- Audio/video processing
- Gaming peripherals
- Set-top box functions
Prototyping and Development
- ASIC prototyping and emulation
- Algorithm verification
- System development and testing
- Educational platforms
Development Tools and Software Support
Design Software Compatibility
| Tool |
Support Level |
| Xilinx ISE Design Suite |
Full Support |
| Schematic Entry |
Supported |
| HDL Synthesis (VHDL/Verilog) |
Supported |
| Simulation Tools |
Supported |
| Bitstream Generation |
Supported |
Configuration Memory Options
The XCS40-3PQ208C can be configured using Xilinx Serial PROMs or other compatible configuration sources. In-system programming allows field updates without device removal.
Why Choose XCS40-3PQ208C for Your Design
Key Advantages
- Cost-Effective: Approaches mask-programmed ASIC pricing at high volumes
- Flexibility: Unlimited reprogrammability for design iterations
- Performance: Up to 125 MHz system frequency
- Reliability: Proven Xilinx Spartan architecture
- Legacy Support: Extensive documentation and design resources available
Quality and Compliance
- 100% functionally tested devices
- Commercial temperature grade qualification
- RoHS compliance available (check specific variants)
Additional Resources
For comprehensive selection of Xilinx FPGA devices including the Spartan family, evaluation boards, and development kits, explore authorized distributors and technical documentation to support your programmable logic design requirements.
Summary Specifications Table for XCS40-3PQ208C
| Category |
Parameter |
Value |
| Logic |
System Gates |
40,000 |
| Logic |
Logic Cells |
1,862 |
| Logic |
CLBs |
784 |
| Memory |
Distributed RAM |
25,088 bits |
| Performance |
Max Frequency |
125 MHz |
| I/O |
User I/O |
169 |
| Power |
Supply Voltage |
5V |
| Package |
Type |
208-PQFP |
| Package |
Dimensions |
28mm × 28mm |
| Temperature |
Operating Range |
0°C to +85°C |
| Interface |
JTAG |
IEEE 1149.1 |
| Technology |
Process |
CMOS |
The XCS40-3PQ208C represents Xilinx’s commitment to delivering high-performance, cost-effective FPGA solutions for volume applications requiring reliable programmable logic.
