Meta Description: XCS40-3BG256C is a Xilinx Spartan FPGA with 40K gates, 1862 logic cells, 205 I/O pins in 256-BGA package. Ideal for ASIC replacement and industrial applications.
The XCS40-3BG256C is a high-performance Field Programmable Gate Array (FPGA) from the Xilinx Spartan family, now manufactured by AMD. This versatile programmable logic device delivers exceptional value for designers seeking ASIC replacement solutions with gate counts up to 40,000. Whether you’re working on industrial automation, automotive infotainment, or embedded systems, this Xilinx FPGA provides the flexibility and performance your project demands.
XCS40-3BG256C Key Features and Benefits
The Spartan series represents Xilinx’s commitment to delivering cost-effective programmable logic solutions. The XCS40-3BG256C combines high gate density with on-chip RAM capabilities, making it suitable for complex digital designs that would traditionally require expensive ASIC development.
Why Choose the XCS40-3BG256C FPGA?
This device eliminates the long development cycles and inherent risks associated with conventional ASICs. Engineers benefit from rapid prototyping capabilities while maintaining production-ready performance levels that meet industrial standards.
XCS40-3BG256C Technical Specifications
| Parameter |
Specification |
| Part Number |
XCS40-3BG256C |
| Manufacturer |
AMD (formerly Xilinx) |
| Family |
Spartan |
| System Gates |
40,000 |
| Logic Cells |
1,862 |
| CLB Array |
28 × 28 (784 CLBs) |
| Maximum Frequency |
125 MHz |
| Supply Voltage |
5V |
| User I/O Pins |
205 |
| Total RAM Bits |
25,088 |
| Flip-Flops |
2,016 |
| Package Type |
256-Pin BGA |
XCS40-3BG256C Package Information
| Specification |
Details |
| Package Style |
Ball Grid Array (BGA) |
| Pin Count |
256 |
| Package Dimensions |
27 mm × 27 mm |
| Mounting Type |
Surface Mount (SMD) |
| RoHS Compliance |
Yes (Lead-Free) |
| Operating Temperature |
Commercial Grade (0°C to +85°C) |
XCS40-3BG256C Architecture Overview
Configurable Logic Blocks (CLBs)
The XCS40-3BG256C features 784 Configurable Logic Blocks arranged in a 28×28 array. Each CLB contains three look-up tables (LUTs) for logic function generation, two flip-flops, and signal steering multiplexers. This architecture enables implementation of Boolean functions with up to nine inputs through LUT combination.
On-Chip Memory Resources
With 25,088 bits of distributed RAM, the XCS40-3BG256C supports data storage requirements without external memory components. The RAM bits integrate seamlessly with the CLB structure, allowing designers to allocate memory resources as needed for their specific applications.
Input/Output Block (IOB) Features
The 205 user I/O pins provide flexible interfacing options for connecting to external components and systems. Each IOB supports multiple I/O standards, enabling compatibility with various voltage levels and signaling protocols used in modern electronic designs.
XCS40-3BG256C Speed Grade Information
| Speed Grade |
Description |
| -3 |
Standard speed grade |
| -4 |
Enhanced performance grade |
| -5 |
High-speed grade |
The “-3” designation in XCS40-3BG256C indicates the standard speed grade, providing optimal balance between performance and power consumption for typical applications.
XCS40-3BG256C Application Areas
Industrial Automation
The XCS40-3BG256C excels in motor drive controllers, PLC modules, and sensor interface applications where real-time processing and reliable operation are essential requirements.
Automotive Infotainment Systems
Dashboard displays, navigation systems, and audio processing units benefit from the FPGA’s parallel processing capabilities and flexible I/O configuration options.
Consumer Electronics
Gaming devices, set-top boxes, and personal electronics leverage the XCS40-3BG256C for video processing, user interface management, and peripheral control functions.
Telecommunications Equipment
Protocol conversion, signal processing, and network interface applications utilize the device’s high-speed logic and memory resources.
XCS40-3BG256C Configuration Options
| Configuration Mode |
Description |
| Master Serial |
FPGA generates configuration clock |
| Slave Serial |
External controller provides clock |
| Master Parallel |
8-bit parallel configuration |
| Boundary Scan (JTAG) |
IEEE 1149.1 compliant programming |
JTAG Boundary Scan Support
The XCS40-3BG256C includes full JTAG boundary scan capability with IDCODE register support. This feature enables in-circuit testing and device identification during board-level debugging and production testing.
XCS40-3BG256C Design Considerations
Power Supply Requirements
Proper power sequencing and decoupling capacitor placement ensure stable FPGA operation. The 5V supply voltage requires adequate filtering to minimize noise-related configuration errors.
PCB Layout Guidelines
The 256-pin BGA package requires controlled impedance routing for high-speed signals. Maintain proper ground plane integrity beneath the device footprint for optimal signal integrity.
Thermal Management
While the XCS40-3BG256C operates within commercial temperature ranges, adequate airflow or heat spreading may be necessary in thermally constrained enclosures.
XCS40-3BG256C Ordering Information
| Order Code |
Package |
Temperature |
| XCS40-3BG256C |
256-BGA |
Commercial (0°C to +85°C) |
| XCS40-3BG256I |
256-BGA |
Industrial (-40°C to +100°C) |
XCS40-3BG256C vs Alternative FPGA Options
| Feature |
XCS40-3BG256C |
XCS30-3BG256C |
XCS40-4PQ208C |
| System Gates |
40,000 |
30,000 |
40,000 |
| Logic Cells |
1,862 |
1,368 |
1,862 |
| User I/O |
205 |
205 |
169 |
| Package |
256-BGA |
256-BGA |
208-PQFP |
| Speed Grade |
-3 |
-3 |
-4 |
XCS40-3BG256C Development Tools
Xilinx ISE Design Suite provides comprehensive support for XCS40-3BG256C development. The toolchain includes schematic capture, HDL synthesis, simulation, and device programming capabilities essential for successful FPGA implementation.
Conclusion
The XCS40-3BG256C delivers proven Spartan FPGA technology in a compact 256-BGA package. With 40,000 system gates, 1,862 logic cells, and 205 user I/O pins, this device serves diverse applications from industrial control to consumer electronics. The combination of on-chip RAM, flexible configuration options, and comprehensive development tool support makes the XCS40-3BG256C an excellent choice for cost-sensitive programmable logic designs.
