The XCKU085-3FLVF1924E is a high-performance Xilinx FPGA from the Kintex® UltraScale™ family, built on TSMC’s 20nm process node. Designed to deliver an exceptional balance of price, performance, and power efficiency, the XCKU085-3FLVF1924E is one of the fastest speed-grade variants in the KU085 lineup, making it the preferred choice for demanding signal processing, networking, and data center acceleration workloads.

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What Is the XCKU085-3FLVF1924E?

The XCKU085-3FLVF1924E belongs to AMD Xilinx’s Kintex UltraScale product family — a mid-range FPGA series that delivers the highest signal processing bandwidth available in its class. The part number breaks down as follows:

The -3 speed grade is the highest performance tier available in the Kintex UltraScale series, providing the fastest logic switching speeds and maximum operating frequency — making the XCKU085-3FLVF1924E ideal for latency-sensitive, throughput-intensive applications.

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XCKU085-3FLVF1924E Key Specifications

Logic and Fabric Resources

Memory Resources

DSP and Arithmetic

I/O and Transceiver Resources

Clock Management

Operating Conditions

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XCKU085-3FLVF1924E vs. Other XCKU085 Speed Grades

Choosing the right speed grade impacts timing margins and maximum achievable clock frequency. The table below compares the three main commercial speed grades for the KU085 device:

The -3 speed grade gives designers the greatest timing margins and lets designs run at higher clock frequencies without risking setup or hold violations, reducing risk in high-speed PCIe, DDR4, and multi-gigabit transceiver applications.

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Architecture Highlights: Kintex UltraScale at 20nm

H2: UltraScale Architecture for Next-Generation Performance

The XCKU085-3FLVF1924E is built on Xilinx’s UltraScale architecture — the same architectural platform used in Virtex UltraScale devices, but optimized for mid-range cost points. This architecture introduces several key improvements over previous-generation 7 Series devices:

• AMBA AXI4-based NoC-inspired routing eliminates most routing congestion bottlenecks found in older FPGAs.
• SSI (Stacked Silicon Interconnect) technology allows the KU085 to use a partial die configuration, enabling a very large logic density at competitive cost.
• UltraRAM blocks (available on UltraScale+ variants) complement Block RAM for deep, wide memory arrays.
• Next-generation GTH transceivers deliver up to 16.3 Gbps per lane, supporting 100G Ethernet, PCIe Gen3, Interlaken, and more.

H3: DSP48E2 Slices for Signal Processing

The 2,760 DSP48E2 slices in the XCKU085-3FLVF1924E are purpose-built for high-throughput digital signal processing. Each slice supports:

• 27×18-bit signed multiplications
• Pre-adder to reduce LUT usage for symmetric FIR filters
• Pattern detector for convergent rounding and overflow detection
• Cascade connections for large multiply-accumulate chains without consuming routing resources

This makes the XCKU085 one of the most DSP-dense mid-range FPGAs available, ideal for radar signal processing, software-defined radio (SDR), video encoding pipelines, and financial analytics.

H3: High-Speed GTH Transceiver Capabilities

With 56 GTH transceivers capable of reaching 16.3 Gbps per channel, the XCKU085-3FLVF1924E excels in high-bandwidth serial connectivity:

• PCIe Gen3 x8 endpoint and root port support
• 100G Ethernet via multiple 10G lanes
• Interlaken protocol for chip-to-chip connectivity
• CPRI/OBSAI for wireless baseband front-haul
• Custom serial protocols using Xilinx’s GTP/GTH wrappers

H3: Advanced Clock Management with MMCM and PLL

The 10 MMCMs and 20 PLLs spread across 22 clock regions provide unparalleled flexibility in clock synthesis, frequency multiplication, phase shifting, and spread-spectrum clocking — critical for EMI reduction in commercial products.

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XCKU085-3FLVF1924E Package Details: FLVF1924

The 1924-pin FCBGA (Flip-Chip Ball Grid Array) package used by this part is one of the largest packages in the KU085 family, offering:

The FLVF1924 package provides the highest I/O count available for the KU085 die, making it the best choice for designs with large bus widths, multiple memory interfaces (DDR4/LPDDR4), or dense peripheral connectivity requirements.

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Typical Applications for the XCKU085-3FLVF1924E

The XCKU085-3FLVF1924E is used across a broad range of high-performance applications:

H3: Wireless and 5G Base Station Processing

The combination of 2,760 DSP slices and 56 GTH transceivers makes this FPGA well-suited for 4G/5G base station baseband processing, massive MIMO signal chains, and CPRI front-haul interfaces.

H3: Data Center Acceleration and SmartNIC

With PCIe Gen3 x8 support, 100G Ethernet capability, and over 1 million logic cells, the XCKU085-3FLVF1924E powers SmartNICs, FPGA-based inference accelerators, and storage controllers in cloud data centers.

H3: High-Performance Computing (HPC)

The device’s large logic fabric, deep Block RAM, and high-speed transceivers make it a strong candidate for HPC co-processors, scientific simulation accelerators, and custom compute engines.

H3: Test and Measurement Equipment

Precision clock management (MMCMs/PLLs), high I/O count, and wide DSP bandwidth make the XCKU085 ideal for ATE (automated test equipment), oscilloscopes, and protocol analyzers.

H3: Video and Broadcast Infrastructure

The FPGA’s 624 I/Os and transceiver capability support 4K/8K uncompressed video routing, SMPTE 2110 IP media networking, and real-time video processing pipelines.

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Development Tools and Design Flow

The XCKU085-3FLVF1924E is fully supported in AMD’s Vivado Design Suite, which provides:

Designers transitioning from 7 Series or older UltraScale devices will find the tool flow familiar, while new users benefit from Xilinx’s extensive IP catalog and reference designs for DDR4, PCIe, Ethernet, and more.

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Ordering Information

Note: The XCKU085-3FLVF1924E is RoHS compliant and classified as a commercial/extended temperature device. It is not a defense-grade (XQ) part. For military screening, consult AMD’s defense product catalog.

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Frequently Asked Questions

What does the “-3” speed grade mean on the XCKU085-3FLVF1924E?

The -3 speed grade represents the highest performance tier in the Kintex UltraScale family. Devices with faster speed grades have tighter internal timing specifications, allowing them to operate reliably at higher clock frequencies. For the XCKU085, the -3 grade supports operation up to approximately 725 MHz, compared to ~661 MHz for -2 and ~630 MHz for -1 devices.

What is the difference between XCKU085-3FLVF1924E and XCKU085-2FLVF1924E?

Both parts share the same die, package (FLVF1924), I/O count (624), and logic resources. The only difference is the speed grade: the -3 variant is screened for higher performance and supports faster operation. If your design has strict timing requirements or operates at very high frequencies, the -3 grade is the recommended choice.

Is the XCKU085-3FLVF1924E suitable for DDR4 memory interfaces?

Yes. The HP (High Performance) I/O banks and integrated MMCM/PLL clock management resources on the XCKU085-3FLVF1924E are specifically designed to support high-speed external memory standards including DDR4, LPDDR4, and QDR-IV SRAM using Xilinx’s MIG (Memory Interface Generator) IP.

What transceivers does the XCKU085 support?

The XCKU085 family includes 56 GTH transceivers capable of up to 16.3 Gbps per channel. These support PCIe Gen3, 10GbE/100GbE, Interlaken, CPRI, OTN, and a wide range of custom serial protocols.

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Summary

The XCKU085-3FLVF1924E stands out as the top-performance variant of one of Xilinx’s most capable mid-range FPGAs. With over 1 million logic cells, 2,760 DSP slices, 58 Mb of Block RAM, 56 GTH transceivers, and 624 user I/Os in the expansive 1924-pin FCBGA package — all operating at the fastest -3 speed grade — this device is built for engineers who need maximum performance without stepping up to the Virtex UltraScale tier.

Whether you’re building a 5G base station, a data center accelerator card, a 100G networking appliance, or a precision test instrument, the XCKU085-3FLVF1924E provides the logic density, memory bandwidth, and high-speed I/O to bring your design to production with confidence.