The XCKU085-1FLVA1517I is a high-performance industrial-grade Field Programmable Gate Array (FPGA) from AMD Xilinx’s Kintex UltraScale family. Built on a 20nm process node and housed in a 1517-pin FCBGA package, it delivers over one million logic cells, deep on-chip memory, and high-speed serial transceivers — making it one of the most capable mid-range FPGAs available for demanding signal processing, communications, and embedded computing applications.

For engineers seeking a proven programmable logic device with industrial reliability, this component represents an optimal balance of performance, density, and cost — a hallmark of the Xilinx FPGA product line.

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What Is the XCKU085-1FLVA1517I?

The XCKU085-1FLVA1517I belongs to AMD Xilinx’s Kintex UltraScale series — a family of FPGAs specifically engineered for applications that demand high DSP throughput, large block RAM capacity, and next-generation multi-gigabit transceivers, all within a cost-effective silicon package. The “-1” speed grade designates standard performance, the “FLVA1517” refers to the 1517-pin Fine-pitch Land Grid Array Ball Grid Array (FCBGA) package, and the trailing “I” confirms industrial temperature grade operation.

This device uses AMD’s UltraScale architecture, which introduced ASIC-like design techniques to the FPGA world — including advanced routing, on-die decoupling, and optimized clock distribution — delivering performance levels that previously required much larger or more expensive devices.

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XCKU085-1FLVA1517I Key Specifications at a Glance

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XCKU085-1FLVA1517I Detailed Technical Specifications

Logic Architecture and Fabric Density

The XCKU085-1FLVA1517I features 1,088,325 logic cells arranged in 497,520 Configurable Logic Blocks (CLBs). Each CLB in the UltraScale architecture contains look-up tables (LUTs), flip-flops, and carry logic — organized to maximize routing efficiency and minimize critical path delays compared to previous Xilinx FPGA generations.

The UltraScale architecture introduced a new routing methodology that virtually eliminates inter-die speed penalties seen in older stacked silicon interconnect (SSI) devices. This makes the XCKU085 particularly well-suited for large, highly connected designs where routing congestion would otherwise limit performance.

Memory Resources

The large on-chip block RAM capacity makes this device highly effective for buffering, packet processing, and applications requiring large lookup tables — all without consuming external memory bandwidth.

DSP and Signal Processing

The XCKU085 family includes a rich complement of hardened DSP48E2 slices, each capable of high-speed multiply-accumulate operations. These slices support 27×18-bit multiplications and 48-bit accumulation, enabling efficient implementation of FFTs, FIR filters, matrix multiplications, and other compute-intensive signal processing pipelines.

I/O and Transceiver Capabilities

The device’s SelectIO technology provides flexible, high-performance I/O that can be configured for a wide range of single-ended and differential standards, supporting memory interfaces up to DDR4 speeds.

Clock Management

The XCKU085-1FLVA1517I includes Mixed-Mode Clock Managers (MMCMs) and Phase-Locked Loops (PLLs), enabling precise clock synthesis, frequency multiplication, phase shifting, and de-skewing across the device. The clock distribution network is designed to minimize skew and power consumption, meeting the requirements of both high-speed data processing and carefully timed multi-domain designs.

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Part Number Decoder: Understanding XCKU085-1FLVA1517I

Understanding the naming convention helps engineers select the right variant for their application.

The industrial “I” suffix is a critical differentiator — it guarantees the device has been screened and characterized for reliable operation across a wider thermal range than commercial-grade parts, making it suitable for deployments in harsh or mission-critical environments.

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Industrial Temperature Grade: Why the “I” Suffix Matters

The XCKU085-1FLVA1517I is rated for industrial temperature operation from -40°C to +100°C junction temperature. This extended range qualification is important for:

• Telecommunications infrastructure — outdoor base stations and routers exposed to temperature extremes
• Aerospace and defense systems — avionics, radar, and electronic warfare applications
• Industrial automation — factory floor equipment, motor drives, and PLCs operating in thermally variable environments
• Automotive and transportation — in-cabin systems or transportation hub electronics
• Medical electronics — devices requiring long-term reliability and broad operating conditions

Commercial-grade FPGAs rated only for 0°C to 85°C would not meet the qualification requirements for these markets. The industrial grade provides the necessary margins and screening for lifecycle-critical deployments.

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Kintex UltraScale Architecture Advantages

ASIC-Like Routing Performance

Unlike previous FPGA generations that relied on hierarchical routing trees, the UltraScale architecture uses a routing scheme inspired by ASIC design methodology. This reduces routing overhead and allows designs to close timing at higher clock frequencies with less effort from place-and-route tools.

Advanced Clock Distribution

The clock network minimizes skew, power, and delay across the entire device fabric. Clock management technology integrates tightly with dedicated memory interface circuitry to support high-performance external memories including DDR4 and serial interfaces like HMC.

High DSP-to-Logic Ratio

The Kintex UltraScale family was specifically engineered with a high ratio of DSP slices to logic fabric. This makes devices like the XCKU085 exceptionally well-suited to:

• Software-defined radio (SDR) baseband processing
• Video and image processing pipelines
• Machine learning inference accelerators
• Radar and sonar signal processing
• Financial computing (low-latency algorithmic trading)

Power Efficiency at Scale

The 20nm process node provides meaningful power savings over 28nm predecessors while maintaining or exceeding performance. The UltraScale power management capabilities — including per-bank voltage control and configurable I/O standards — allow designers to tune the power profile of the device to match system power budgets.

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Supported High-Speed Protocols and Interfaces

The combination of hardened PCIe Gen3 and 100G Ethernet blocks means a significant portion of common high-speed interface logic is implemented in dedicated, optimized silicon — freeing the programmable fabric for application-specific logic.

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Typical Application Areas for XCKU085-1FLVA1517I

The XCKU085-1FLVA1517I is particularly well-matched to the following application domains:

Wireless Communications and 5G Infrastructure High DSP density supports multi-antenna (MIMO) baseband processing, digital pre-distortion (DPD), and beamforming algorithms required by modern 5G radio access network (RAN) equipment.

Data Center Networking and SmartNICs The combination of 100G Ethernet, PCIe Gen3, and large logic fabric enables hardware-accelerated packet processing, network function virtualization (NFV), and FPGA-based SmartNIC implementations.

High-Performance Computing and AI Inference Large block RAM and DSP resources support matrix computation engines for neural network inference acceleration, commonly used in edge AI and data center AI accelerator cards.

Radar and Electronic Warfare Wideband signal acquisition and processing, pulse compression, and beamforming in defense radar systems benefit from the device’s high-speed transceivers and DSP throughput.

Broadcast and Professional Video 4K/8K video processing, multi-channel SDI interfaces, and video codec acceleration are well-supported by the device’s I/O flexibility and logic density.

Test and Measurement High-speed data capture, protocol analysis, and stimulus generation in automated test equipment (ATE) leverage the full capability of the XCKU085’s resources.

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Development Tools and Ecosystem

The XCKU085-1FLVA1517I is fully supported by AMD’s Vivado Design Suite, which provides:

• RTL synthesis and implementation
• Timing closure and static timing analysis
• IP integrator for block diagram-based design
• High-Level Synthesis (HLS) for C/C++ to RTL conversion
• Partial reconfiguration support
• In-system debugging via Integrated Logic Analyzer (ILA)

The Vivado toolchain supersedes the older ISE Design Suite and is the recommended path for all UltraScale development. Designers can also leverage AMD’s Vitis unified software platform for heterogeneous acceleration applications combining FPGA logic with host-side software.

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Ordering and Compliance Information

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XCKU085-1FLVA1517I vs. Speed Grade Variants

The XCKU085 die is available in multiple speed grades sharing the same package. Understanding these differences helps procurement and design teams select the correct variant.

The -1I variant (this product) is the most common choice for industrial designs where reliable operation over temperature is required, but the absolute maximum clock frequency of the -2 or -3 grade is not necessary.

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Summary: Why Choose the XCKU085-1FLVA1517I?

The XCKU085-1FLVA1517I delivers a compelling combination of attributes that are difficult to match in a single device:

• Over 1 million logic cells for complex, large-scale designs
• 56,900 Kbit of block RAM for on-chip data buffering
• 624 user I/Os with support for DDR4 and high-speed differential standards
• Hardened PCIe Gen3 and 100G Ethernet for system-level connectivity
• Industrial temperature grade for deployment in harsh environments
• 20nm process for an efficient balance of performance and power
• Full Vivado Design Suite support for modern FPGA development workflows

Whether the application is 5G infrastructure, data center acceleration, radar signal processing, or industrial automation, the XCKU085-1FLVA1517I provides the silicon resources and reliability to meet demanding design requirements.