The XC4085XLA-O9BGG352C is a high-capacity, SRAM-based Field Programmable Gate Array (FPGA) from the Xilinx XC4000XLA family, now under AMD’s product portfolio following Xilinx’s 2022 acquisition. This device delivers approximately 85,000 equivalent logic gates in a robust 352-pin BGA package, making it one of the most capable devices in its legacy series. It is a go-to choice for engineers who need reliable, reprogrammable logic for industrial control, signal processing, data communications, and VLSI prototyping applications.

For a comprehensive overview of related products, visit Xilinx FPGA solutions available today.

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Key Features of the XC4085XLA-O9BGG352C

The XC4085XLA-O9BGG352C combines architectural versatility with proven CMOS technology. Key highlights include:

• 85,000 equivalent logic gates with 7,448 logic cells
• 0.35 µm CMOS process technology for reduced power consumption and enhanced routing efficiency
• 3.3V core supply voltage with support for 3.3V LVTTL, 5V TTL, and PCI I/O standards
• Up to 227 MHz maximum operating frequency
• 352-pin BGA package with a commercial temperature grade
• SRAM-based configuration — fully reprogrammable, supports unlimited design iterations
• JTAG boundary scan (IEEE 1149.1) for in-system programming and testing
• Programmable slew rate and drive strength for enhanced signal integrity
• Compatible with Xilinx ISE and Foundation legacy design tools

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XC4085XLA-O9BGG352C Complete Specifications

General Specifications

Package & Physical Specifications

I/O and Interface Specifications

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What Is the XC4000XLA FPGA Family?

The XC4000XLA series represents the culmination of Xilinx’s fourth-generation FPGA architecture. These devices were the result of over fifteen years of FPGA design experience, engineered to provide the benefits of custom CMOS VLSI without the cost, risk, or long lead times associated with masked gate arrays. The “XLA” designation indicates the enhanced version of the XC4000 family — built on a refined 0.35 µm process that delivers improved speed grades and lower power compared to earlier XC4000XL variants.

The XC4085XLA sits at the top of the XLA density range, offering the maximum gate count available in this architecture, while maintaining full footprint and toolchain compatibility with other XC4000-series devices. This makes the XC4085XLA-O9BGG352C an excellent drop-in upgrade option when a design demands maximum logic density.

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Part Number Decoder: Understanding XC4085XLA-O9BGG352C

The part number encodes important ordering and specification information:

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XC4085XLA-O9BGG352C vs. Related Variants

Xilinx offered the XC4085XLA in multiple package and temperature options. The table below compares the most common variants:

The -O9BGG352C variant targets commercial-grade applications requiring the compact 352-pin BGA footprint with the standard -09 speed grade, offering a balance of performance and cost for non-harsh environments.

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Applications and Use Cases

#### Industrial Automation and Control Systems

The XC4085XLA-O9BGG352C provides the logic density required to implement complex state machines, multi-axis motor controllers, and real-time I/O processing for industrial PLC replacement designs and custom control hardware.

#### Data Communications and Networking

With up to 227 MHz operation and PCI-compatible I/O, this FPGA handles packet processing, routing table lookups, and protocol bridging in legacy network equipment, switches, and data communication modules.

#### VLSI Prototyping and ASIC Emulation

Engineers use the XC4085XLA-O9BGG352C to prototype and emulate ASIC functionality before chip fabrication. Its SRAM-based configuration allows rapid iteration, hardware debugging, and architectural validation — reducing design risk significantly.

#### Signal Processing and DSP Applications

The device supports high-speed arithmetic and data path implementations suitable for digital filtering, FFT computation, and video/image processing pipelines used in legacy embedded systems.

#### Defense and Aerospace Legacy System Maintenance

Due to its extended production history and broad availability through authorized distributors such as Rochester Electronics, the XC4085XLA-O9BGG352C is widely used for sparing, repair, and obsolescence management of deployed defense and aerospace systems.

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Programming and Development Tools

The XC4085XLA-O9BGG352C is supported by Xilinx ISE (Integrated Software Environment) and older Xilinx Foundation tools. Modern Vivado software does not support this device. Designers use VHDL or Verilog as their hardware description language of choice for implementing and simulating designs targeting this FPGA.

Programming is performed via a JTAG interface using a compatible cable, such as the Xilinx Platform Cable USB II, connected to the device’s JTAG port. An external configuration PROM can also store the bitstream for automatic loading at power-up, enabling in-field updates without physically removing the device.

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Why Source the XC4085XLA-O9BGG352C from Authorized Distributors?

The XC4085XLA-O9BGG352C is classified as an obsolete/legacy component, meaning Xilinx no longer manufactures it in volume. This creates a supply risk for system designers who depend on this part. Sourcing from authorized distributors — such as Rochester Electronics, which manufactures these devices under an authorized license — ensures:

• Genuine, fully tested devices meeting original Xilinx specifications
• Traceability documentation for quality and compliance requirements
• Access to last-time-buy inventory and long-term support agreements
• Reduced risk of counterfeit or substandard components found in the open market

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Frequently Asked Questions (FAQ)

Q: Is the XC4085XLA-O9BGG352C still in production?
A: No. This device is classified as obsolete. However, authorized distributors including Rochester Electronics continue to offer genuine stock manufactured to the original Xilinx specifications.

Q: What design software supports the XC4085XLA-O9BGG352C?
A: Xilinx ISE WebPACK and Xilinx Foundation are the primary supported tools. Xilinx Vivado does not support this legacy device.

Q: What is the maximum operating temperature for the commercial grade?
A: The commercial temperature grade (“C” suffix) covers an ambient operating range of 0°C to +85°C.

Q: Can this FPGA be reprogrammed in the field?
A: Yes. The SRAM-based architecture allows unlimited reprogramming via JTAG, making remote or in-field firmware updates straightforward.

Q: What I/O voltage standards are supported?
A: The XC4085XLA-O9BGG352C supports 3.3V LVTTL, 5V TTL, and PCI-compatible I/O standards, providing broad interface flexibility for mixed-voltage system designs.

Q: Is the XC4085XLA-O9BGG352C RoHS compliant?
A: This is a legacy device and is listed as non-RoHS compliant. Designers with strict environmental compliance requirements should verify with their distributor for available compliant alternatives.

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Summary

The XC4085XLA-O9BGG352C is a proven, high-density FPGA that continues to play a critical role in legacy system maintenance, defense electronics, industrial automation, and ASIC prototyping. Its 85,000-gate capacity, 352-pin BGA package, 3.3V CMOS architecture, and JTAG-based reprogrammability make it a versatile and dependable device for engineers managing long-lifecycle designs. When sourced from authorized distributors, it remains a reliable solution for both new design starts requiring legacy compatibility and long-term system support programs.