The XCKU035-1FBVA676C is a high-performance Field Programmable Gate Array (FPGA) from AMD Xilinx, belonging to the Kintex UltraScale family. Built on 20nm process technology, this device delivers an industry-leading balance of price, performance, and power efficiency — making it one of the most sought-after mid-range FPGAs for demanding embedded applications. Whether you are designing for 100G networking, DSP-intensive imaging, or heterogeneous wireless infrastructure, the XCKU035-1FBVA676C offers the computational muscle and flexibility to meet your requirements.

If you are sourcing or evaluating Xilinx FPGA components for your next project, this guide covers everything you need to know — from key specifications and logic resources to supported interfaces, design tools, and typical applications.

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What Is the XCKU035-1FBVA676C?

The XCKU035-1FBVA676C is a 676-pin FCBGA (Flip-Chip Ball Grid Array) packaged FPGA from the Kintex UltraScale product line. The part number breaks down as follows:

This device is manufactured by AMD (formerly Xilinx), now listed under AMD’s Adaptive SoC and FPGA portfolio. It is RoHS compliant and is available in tray packaging.

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XCKU035-1FBVA676C Key Specifications at a Glance

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XCKU035-1FBVA676C Logic and Memory Resources

#### Configurable Logic Blocks (CLBs) and LUT Architecture

The XCKU035-1FBVA676C features 203,128 logic blocks delivering approximately 444,343 equivalent cells, providing substantial programmable logic capacity for complex digital designs. The UltraScale CLB architecture uses a 6-input LUT (LUT6) structure with dedicated carry chains, enabling efficient implementation of arithmetic, control logic, and state machines.

Each CLB in the Kintex UltraScale family supports:

• 6-input Look-Up Tables (LUT6)
• Flip-flops and latches
• Dedicated carry logic for fast arithmetic
• Distributed RAM and shift register capabilities

#### Block RAM Resources

Block RAM in the UltraScale architecture supports true dual-port operation, byte-wide write enables, and built-in FIFO logic — ideal for data buffering, look-up tables, and on-chip memory in networking and DSP pipelines.

#### DSP Slices

The XCKU035 device incorporates a large array of DSP48E2 slices, delivering exceptional signal processing performance. Key DSP capabilities include:

• 27×18-bit signed multipliers
• 48-bit accumulator
• Pre-adder for symmetric filter structures
• Pattern detection for overflow and convergence
• Cascadable architecture for high-throughput pipelines

This architecture is specifically optimized for applications like FIR filtering, FFT, radar signal processing, and video processing.

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I/O and Transceiver Capabilities

#### High-Speed I/O Interfaces

The XCKU035-1FBVA676C provides 520 maximum user I/Os across multiple I/O banks, supporting a wide range of single-ended and differential signaling standards.

#### Clocking Resources

• MMCM (Mixed-Mode Clock Manager) and PLL resources for flexible clock synthesis
• ASIC-like clocking architecture with fine-grained clock gating
• Up to 630 MHz operating frequency
• Global and regional clock networks for low-skew distribution

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Power Supply Requirements

Proper power sequencing and supply delivery are critical for the XCKU035-1FBVA676C. The table below summarizes the key power rails:

Xilinx recommends using the Xilinx Power Estimator (XPE) tool after configuration to accurately estimate current drain per supply rail under operating conditions.

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Package Details: 676-Pin FCBGA

The FCBGA package offers excellent thermal performance and signal integrity for high-density PCB designs. Its 1.0mm ball pitch is compatible with standard PCB manufacturing processes while maintaining robust mechanical reliability.

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Supported Applications

The XCKU035-1FBVA676C is engineered for high-performance, mid-range applications where cost-effectiveness and computational density both matter. Key target markets include:

#### Networking and Communications

• 100G Ethernet packet processing — line-rate classification, forwarding, and scheduling
• SD-WAN and network virtualization — programmable data planes
• Wireless base stations — LTE, 5G NR radio unit (RU) and digital front-end (DFE) processing

#### Aerospace and Defense

• Radar and SIGINT signal processing — real-time FFT, matched filtering, and pulse compression
• Secure communications — encryption/decryption at high data rates
• Avionics data acquisition — high-reliability embedded processing

#### Medical Imaging

• Ultrasound beamforming — real-time parallel DSP pipelines
• CT/MRI reconstruction — large-scale matrix operations
• 8K/4K video processing — multi-channel real-time image processing

#### Data Centers

• Hardware acceleration — SmartNIC offload, storage compression, encryption
• Machine learning inference — fixed-point matrix multiply pipelines
• High-frequency trading — ultra-low-latency market data processing

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Design Tool Support

The XCKU035-1FBVA676C is fully supported by AMD’s Vivado Design Suite, which provides an integrated environment for FPGA design closure.

Vivado is co-optimized with UltraScale devices and delivers significant improvements in timing closure speed and design utilization compared to older ISE tools.

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Footprint Compatibility and Migration

One of the practical advantages of the Kintex UltraScale family is its footprint compatibility with Virtex UltraScale devices. Designs targeting the XCKU035 in the FBVA676 package can be migrated to larger Virtex UltraScale devices in the same package footprint — enabling design scalability without PCB respins.

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Ordering Information

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XCKU035-1FBVA676C vs. Similar Kintex UltraScale Variants

The -1 speed grade variant is a production-qualified, cost-optimized option with VCCINT at 0.95V. The -2 and -3 speed grades offer higher performance at the expense of slightly higher power, while the -1L variant is screened for lower static power at 0.90V VCCINT.

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Frequently Asked Questions (FAQ)

Q: What is the XCKU035-1FBVA676C used for? The XCKU035-1FBVA676C is used in a wide range of applications including 100G networking, wireless base stations, medical imaging systems, data center acceleration, aerospace signal processing, and video/broadcast applications.

Q: What design software supports XCKU035-1FBVA676C? This device is fully supported by the AMD Vivado Design Suite and Vitis Unified Platform. It is not supported by the legacy ISE toolchain.

Q: What is the operating temperature range of the XCKU035-1FBVA676C? The “C” suffix indicates a Commercial temperature range: 0°C to +85°C. For industrial or extended range operation, look for the “I” or “E” suffix variants.

Q: Is the XCKU035-1FBVA676C RoHS compliant? Yes. The XCKU035-1FBVA676C is fully RoHS compliant.

Q: What is the core supply voltage for XCKU035-1FBVA676C? The VCCINT (core logic) supply voltage is 0.95V for the -1 speed grade.

Q: Can XCKU035-1FBVA676C be upgraded to a larger FPGA on the same PCB? Yes. The FBVA676 package is footprint-compatible with other Kintex UltraScale devices such as the XCKU025 and XCKU040, as well as compatible Virtex UltraScale devices, enabling board-level scalability.

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Summary

The XCKU035-1FBVA676C is a versatile, high-density FPGA that delivers exceptional performance-per-watt in a compact 676-pin FCBGA form factor. With 444,343 logic cells, 19,456 Kbits of block RAM, 520 user I/Os, and up to 630 MHz operating frequency — all built on 20nm technology — it addresses the most demanding mid-range FPGA applications across networking, defense, medical imaging, and data centers. Backed by full Vivado Design Suite support, footprint compatibility with the broader UltraScale family, and robust PCIe Gen3 and DDR4 integration, the XCKU035-1FBVA676C is a compelling choice for engineers seeking a production-proven, scalable FPGA platform.