The XC3S5000-4FGG900I is a high-capacity, industrial-grade Field Programmable Gate Array (FPGA) from Xilinx’s renowned Spartan-3 family. Designed for cost-sensitive, high-volume applications, this device delivers 5 million system gates, 74,880 logic cells, and 630 MHz performance in a compact 900-pin FBGA package — making it one of the most capable devices in the Spartan-3 lineup. Whether you’re designing for broadband access, industrial control, or embedded systems, the XC3S5000-4FGG900I offers a compelling combination of logic density, I/O flexibility, and low power consumption.

For engineers exploring the broader range of programmable logic solutions, browse our full selection of Xilinx FPGA devices.

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XC3S5000-4FGG900I Key Specifications at a Glance

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What Is the XC3S5000-4FGG900I?

The XC3S5000-4FGG900I is the largest density member of the Xilinx Spartan-3 family, offering 5 million system gates in an industrial-grade (-40°C to +100°C) package. It draws its architecture from Xilinx’s Virtex-II platform, delivering significantly more functionality and bandwidth per dollar than previous-generation programmable logic devices.

The “4” in the part number denotes the speed grade (–4 being the fastest in the Spartan-3 family), while the “I” suffix confirms industrial temperature range operation — a critical requirement for rugged and harsh-environment deployments.

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XC3S5000-4FGG900I Part Number Decoder

Understanding the part number helps engineers quickly identify the correct variant for their design.

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Architecture & Logic Resources

Configurable Logic Blocks (CLBs)

The XC3S5000-4FGG900I contains 8,320 CLBs, each consisting of four slices. Every slice includes two 4-input Look-Up Tables (LUTs) and two flip-flops, enabling efficient implementation of combinational and sequential logic. The architecture supports both distributed RAM and shift register functions within the LUTs, reducing the need for external memory in many applications.

Block RAM

With 1,916,928 bits (approximately 234 KB) of on-chip block RAM, the XC3S5000-4FGG900I supports data buffering, FIFO queues, and embedded processor memory maps without requiring external SRAM. Each block RAM is dual-port, supporting simultaneous read/write operations at independent clock domains.

Digital Clock Managers (DCMs)

The device includes multiple Digital Clock Manager (DCM) blocks derived from the Virtex-II platform. These provide:

• Clock multiplication and division
• Phase shifting
• Clock deskewing
• Frequency synthesis

DCMs are essential for synchronizing interfaces with external components and for meeting tight timing requirements in high-speed designs.

Dedicated Multipliers

Hardware 18×18 signed multipliers are embedded in the device, accelerating DSP functions like FIR filters, FFTs, and control loops without consuming CLB resources.

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I/O Capabilities and Supported Standards

User I/O Overview

Supported I/O Standards

The XC3S5000-4FGG900I supports a wide range of single-ended and differential I/O standards, giving designers the flexibility to interface with virtually any external component or bus.

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Electrical Characteristics

Power Supply Requirements

The low 1.2 V core voltage directly contributes to reduced dynamic power consumption, making the XC3S5000-4FGG900I suitable for systems with tight thermal budgets.

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Package Information: 900-Pin FBGA

Physical Package Details

The 900-pin FBGA package provides the highest I/O count available in the XC3S5000 family, enabling dense board-level integration. The 1 mm ball pitch is compatible with standard PCB manufacturing processes, though proper BGA soldering and X-ray inspection are recommended for quality assurance.

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Operating Conditions

Temperature and Reliability

The “I” (Industrial) temperature grade means the XC3S5000-4FGG900I is characterized and guaranteed to operate within specification across the full industrial junction temperature range of –40°C to +100°C TJ. This makes it suitable for:

• Outdoor and remote installations
• Industrial automation equipment
• Automotive-adjacent applications
• Military and aerospace-adjacent systems (non-Hi-Rel)
• Harsh-environment embedded systems

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XC3S5000-4FGG900I Applications

The combination of logic density, industrial temperature rating, rich I/O support, and cost-effective pricing makes the XC3S5000-4FGG900I ideal across a broad range of markets.

Target Application Areas

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Ordering Information and Variants

XC3S5000 Family Variants by Package and Speed Grade

The XC3S5000-4FGG900I offers the best balance of I/O density and industrial reliability for the XC3S5000 logic capacity tier.

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Development Tools and Design Support

Xilinx ISE Design Suite

The XC3S5000-4FGG900I is supported by Xilinx ISE Design Suite (versions up to ISE 14.7), which provides:

• HDL synthesis (VHDL / Verilog)
• Place-and-route for Spartan-3 devices
• Timing analysis and constraint management
• iMPACT configuration tool for JTAG programming

Note: The Spartan-3 family is not supported in Xilinx Vivado. Use ISE 14.7 (the final release) for all XC3S5000-4FGG900I designs.

Soft Processor Support

The device can host Xilinx MicroBlaze (32-bit soft-core processor), enabling embedded software development using Xilinx SDK. PicoBlaze (8-bit) is also supported for lightweight control tasks.

Configuration Options

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Comparison: XC3S5000-4FGG900I vs. Other Spartan-3 Devices

The XC3S5000-4FGG900I sits at the top of the Spartan-3 density range, offering the maximum logic, RAM, and I/O resources available in the family.

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Frequently Asked Questions (FAQ)

Q: What is the XC3S5000-4FGG900I used for? It is used in applications requiring high logic density, many I/Os, and industrial-grade reliability, including industrial control, broadband equipment, embedded systems, and consumer electronics.

Q: What is the difference between XC3S5000-4FGG900I and XC3S5000-4FGG900C? The “I” suffix denotes the Industrial temperature grade (–40°C to +100°C TJ), while the “C” suffix denotes the Commercial temperature grade (0°C to +85°C TJ). Otherwise, they are electrically identical.

Q: Is the XC3S5000-4FGG900I supported in Vivado? No. This device requires Xilinx ISE Design Suite (ISE 14.7 is the recommended final version). Vivado does not support Spartan-3 devices.

Q: Can I run a soft-core processor on this FPGA? Yes. The XC3S5000-4FGG900I has sufficient logic resources to host MicroBlaze and other soft-core processor designs, complete with peripherals and on-chip memory.

Q: What configuration method should I use? For production designs, Master Serial (SPI Flash) is the most common. For development and debugging, JTAG configuration via iMPACT is recommended.

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Summary

The XC3S5000-4FGG900I is the flagship device of the Xilinx Spartan-3 family, combining 5 million system gates, 633 user I/Os, 234 KB of block RAM, and a 630 MHz maximum frequency in an industrial-rated, surface-mount 900-pin FBGA package. It is an ideal choice for engineers who need maximum Spartan-3 logic density with the assurance of industrial temperature operation. With extensive toolchain support via Xilinx ISE and a well-established ecosystem of reference designs and soft-core processors, the XC3S5000-4FGG900I continues to be a trusted solution for cost-sensitive, high-performance embedded and communications designs.