The XCKU115-L1FLVB2104I is a high-performance Field Programmable Gate Array (FPGA) from AMD Xilinx, belonging to the Kintex® UltraScale™ family. Manufactured at 20nm technology, this device offers an exceptional balance of processing power, signal bandwidth, and power efficiency — making it one of the most capable mid-range FPGAs available for demanding industrial and communications applications.

Whether you are designing for 100G networking, medical imaging, 8K video processing, or heterogeneous wireless infrastructure, the XCKU115-L1FLVB2104I delivers the logic density, DSP performance, and I/O flexibility your design requires.

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What Is the XCKU115-L1FLVB2104I?

The XCKU115-L1FLVB2104I is a member of AMD Xilinx’s Xilinx FPGA Kintex UltraScale series. It is built on 20nm planar technology and uses Stacked Silicon Interconnect (SSI) technology combined with monolithic die architecture to deliver the highest signal processing bandwidth in its class. The part number breaks down as follows:

This industrial-grade temperature range makes the XCKU115-L1FLVB2104I suitable for harsh operating environments, setting it apart from commercial-grade variants.

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XCKU115-L1FLVB2104I Key Specifications

The table below summarizes the core technical specifications of the XCKU115-L1FLVB2104I:

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Package & Ordering Information

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XCKU115-L1FLVB2104I Logic Resources in Detail

Configurable Logic Blocks (CLBs) and LUT Architecture

The XCKU115-L1FLVB2104I provides 663,360 CLB LUTs, enabling extremely complex combinatorial and sequential logic designs. With 1,326,720 flip-flops, the device supports deep pipelining architectures critical for high-throughput signal processing and packet forwarding engines. This level of logic density positions the KU115 at the top of the Kintex UltraScale family.

DSP Performance

With 1,920 DSP48E2 slices, the XCKU115-L1FLVB2104I is optimized for signal processing workloads including FFT engines, FIR filters, matrix multiplications, and floating-point arithmetic. Each DSP48E2 slice supports pre-adder, multiplier, and accumulator operations, enabling efficient implementation of advanced DSP algorithms.

Memory Resources

The device integrates approximately 75.9 Mb of on-chip Block RAM organized in dual-port 36Kb RAMB36 blocks. This deep on-chip memory eliminates the need for external memory in many buffering and caching scenarios, reducing board complexity and BOM cost. The total RAM bit count of 77,722 Kbits enables large data buffering for real-time processing pipelines.

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High-Speed Serial Transceivers

GTH Transceiver Specifications

The XCKU115-L1FLVB2104I features 64 GTH (Gigabit Transceiver High-speed) channels. These next-generation transceivers support a wide range of serial communication protocols and deliver:

The 64 GTH transceivers make this device particularly well-suited for 100G Ethernet line cards, coherent optical transport, and multi-channel radar signal processing.

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Clock Management and Timing

The XCKU115-L1FLVB2104I includes multiple Mixed-Mode Clock Manager (MMCM) and Phase-Locked Loop (PLL) resources for flexible clock generation and management:

The ASIC-like fine-grained clock gating available in UltraScale devices allows clock trees to be optimized dynamically, contributing to up to 40% lower power consumption compared to previous-generation Xilinx FPGAs.

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Configuration and I/O

SelectIO Technology

The 702 user I/O pins are organized into High-Performance (HP) and High-Range (HR) banks supporting:

• LVCMOS, LVDS, HSTL, SSTL, HSUL and other standards
• On-die input termination (ODT)
• Per-pin programmable input/output drive strength
• DCI (Digitally Controlled Impedance) for signal integrity management

Configuration Options

The XCKU115-L1FLVB2104I supports multiple configuration modes including Master SPI, Slave SPI, Master BPI, JTAG, and SelectMAP, providing flexibility for embedded and production programming environments.

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Power Specifications

The low-voltage -L1 speed grade is specifically designed to minimize dynamic and static power consumption while maintaining high performance, making the XCKU115-L1FLVB2104I ideal for power-constrained designs.

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Supported Design Tools

The XCKU115-L1FLVB2104I is fully supported by the AMD Vivado™ Design Suite, which includes:

• RTL synthesis and behavioral simulation
• Place-and-Route with timing analysis
• IP Integrator for block diagram-based design
• Logic analyzer (ILA) and Virtual I/O (VIO) debug cores
• Power analysis with Xilinx Power Estimator (XPE)

The device is also compatible with Vitis™ for high-level synthesis (HLS) and hardware-accelerated application development.

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Typical Applications for the XCKU115-L1FLVB2104I

Networking and Data Center

The KU115’s 64 GTH transceivers and 1,920 DSP slices make it the preferred choice for 100G/400G network line cards, deep packet inspection (DPI) engines, and hardware-accelerated network functions in cloud data centers.

Wireless Infrastructure

The device is widely deployed in heterogeneous wireless base station designs, including LTE-A, 5G NR massive MIMO architectures, and CPRI/eCPRI fronthaul interfaces. The high DSP bandwidth supports complex baseband processing including beamforming algorithms.

Medical Imaging

High-resolution medical imaging systems — including MRI reconstruction engines, CT scan post-processing, and ultrasound signal processing — benefit from the KU115’s large LUT array and dedicated DSP slices for real-time image pipeline acceleration.

Defense and Aerospace

The industrial temperature rating (–40°C to +100°C) and high I/O count make the XCKU115-L1FLVB2104I suitable for mission-critical signal intelligence (SIGINT), radar processing, EW (Electronic Warfare), and secure communications platforms.

High-Performance Computing (HPC)

FPGA-based hardware acceleration for financial analytics, genomics, and machine learning inference leverages the KU115’s combination of on-chip BRAM, GTH transceivers, and DSP slice density.

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XCKU115 Family Comparison Table

The XCKU115-L1FLVB2104I is unique in the family for combining the low-power -L1 speed grade with the maximum 2104-pin package and industrial temperature range, making it the optimal part for thermally constrained, high-density designs.

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Why Choose the XCKU115-L1FLVB2104I?

• Largest Kintex UltraScale device: The KU115 is the highest-density device in the Kintex UltraScale family, providing over 1.45 million system logic cells.
• Low-power speed grade: The -L1 designation offers reduced static and dynamic power vs. the -2 speed grade, extending thermal headroom in high-density PCB designs.
• Industrial grade reliability: Rated for –40°C to +100°C junction temperature, suitable for deployed field environments.
• Massive transceiver count: 64 GTH channels provide over 1 Tbps of aggregate serial I/O bandwidth.
• 20nm SSI technology: The multi-die Stacked Silicon Interconnect technology delivers monolithic-like performance at mid-range cost.
• RoHS Compliant: Meets global environmental compliance standards.

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Frequently Asked Questions (FAQ)

What is the difference between XCKU115-L1FLVB2104I and XCKU115-2FLVB2104I? The primary difference is the speed grade. The -L1 variant operates at a lower voltage and is optimized for power efficiency, while the -2 grade offers higher maximum operating frequency. Both use the same 2104-pin FCBGA package with industrial temperature rating.

What does the “I” suffix mean in XCKU115-L1FLVB2104I? The “I” at the end of the part number indicates Industrial temperature grade, meaning the device is rated to operate reliably from –40°C to +100°C junction temperature.

Is the XCKU115-L1FLVB2104I in production? Yes, this part is an active production device manufactured by AMD (formerly Xilinx). It is available through authorized distributors and global component brokers.

What design tools support the XCKU115-L1FLVB2104I? The device is supported by AMD’s Vivado Design Suite and Vitis platform. Vivado provides full synthesis, place-and-route, and timing closure workflows for this device.

What are the typical lead times for the XCKU115-L1FLVB2104I? Lead times vary by distributor and market conditions. Due to high demand for high-end FPGAs, it is advisable to plan procurement 12–26 weeks in advance for volume orders.

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Summary

The XCKU115-L1FLVB2104I is a top-tier industrial FPGA combining 1,451,100 logic cells, 1,920 DSP slices, 64 GTH transceivers, and 702 user I/Os in a 2104-pin FCBGA package — all within the power-optimized -L1 speed grade and a robust industrial temperature range. It is the definitive choice for engineers building next-generation networking, wireless, imaging, and defense systems who need maximum logic density with power efficiency.