What Is the XCKU095-2FFVA1156I?

The XCKU095-2FFVA1156I is a high-performance Xilinx FPGA from the AMD Kintex UltraScale family. Built on TSMC’s 20nm planar process, this device delivers an exceptional balance of logic density, DSP throughput, and transceiver performance — making it one of the most capable mid-range FPGAs available for demanding signal processing, wireless, and embedded applications.

The “2” in the part number denotes Speed Grade -2 (VCCINT = 0.95V), while the “I” suffix indicates an Industrial temperature rating, qualifying it for operation in environments from –40°C to +100°C. The FFVA1156 package designation indicates a 1156-ball Fine-Pitch BGA at a 1.0mm ball pitch.

This device is part of AMD’s UltraScale architecture generation — a major advancement over the 7 Series that introduces ASIC-class routing, improved clocking, next-generation transceivers, and a scalable interconnect fabric.

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XCKU095-2FFVA1156I Key Specifications

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XCKU095-2FFVA1156I Logic and Fabric Resources

CLB Architecture and LUT Structure

The XCKU095 device contains 537,600 Configurable Logic Blocks (CLBs), each housing 6-input Look-Up Tables (LUT6) and flip-flops. The LUT cells can also be configured as distributed memory, shift registers, and multiplexers, offering exceptional flexibility for both data path and control logic designs.

The UltraScale CLB architecture introduces several improvements over the 7 Series:

• Each CLB contains 8 LUTs and 16 flip-flops
• Dedicated carry chain logic extends across the full fabric height
• Advanced routing with ASIC-like place-and-route (reduces congestion in large designs)
• Integrated shift register (SRL) mode in every LUT

DSP Slices: 27×18 Multiplier Engines

The XCKU095 integrates 2,760 DSP48E2 slices, each containing a 27-bit pre-adder, 27×18 multiplier, and 48-bit accumulator. These slices are optimized for signal processing pipelines and support:

• Multiply-accumulate (MAC) operations
• Complex multiplication (e.g., for FFT and FIR filters)
• 96-bit XOR functionality for error correction
• Pattern detect for zero-latency overflow detection
• Cascaded operation for building high-precision arithmetic chains

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XCKU095-2FFVA1156I Memory Resources

Block RAM: 60,518 Kbits

The XCKU095 provides 60,518 Kbits of on-chip Block RAM, organized as dual-port 36 Kb tiles. Each tile can also be split into two independent 18 Kb blocks. Key features include:

• Built-in FIFO logic (first-in, first-out buffers)
• ECC (Error Correcting Code) support for data integrity
• True dual-port operation at full speed
• Independent read/write port widths (up to 72 bits)

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I/O and Transceiver Capabilities

520 High-Performance User I/Os

The XCKU095-2FFVA1156I provides 520 user I/O pins in the FFVA1156 package. The I/O banks support a wide range of single-ended and differential standards, including LVDS, HSTL, SSTL, and more. Key I/O features:

• Programmable drive strength and slew rate control
• Digital Controlled Impedance (DCI) for signal integrity
• On-die termination (ODT) for memory interfaces
• DDR4 and LPDDR4 memory interface support at high speeds

GTH Transceivers: High-Speed Serial Links

The XCKU095 includes 20 GTH transceivers capable of line rates from 500 Mb/s to 16.3 Gb/s. These full-duplex serial links are used for:

• PCIe Gen3 ×8 connectivity
• 10/40G Ethernet (with appropriate MACs)
• Serial Rapid IO (SRIO)
• JESD204B for high-speed ADC/DAC interfaces
• Custom high-speed backplane interconnects

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Clock Management and Timing

MMCM and PLL Resources

The XCKU095-2FFVA1156I integrates Mixed-Mode Clock Managers (MMCMs) and Phase-Locked Loops (PLLs) that provide flexible, low-jitter clock generation and distribution. The UltraScale clock network offers:

• Fine-grained phase/frequency synthesis
• Dynamic phase shift for real-time clock adjustment
• Clock domain crossing (CDC) support with dedicated buffers
• Minimum clock skew across the full device fabric

The maximum operating frequency for the -2 speed grade reaches 630 MHz for internal fabric logic, with transceivers operating independently at multi-gigabit rates.

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Package and Ordering Information

FFVA1156 Package Details

The XCKU095-2FFVA1156I is housed in a 1156-ball Fine-Pitch Ball Grid Array (FCBGA) package with a 1.0mm ball pitch. This package is footprint-compatible with other Kintex UltraScale devices sharing the “A1156” package designator, making it straightforward to migrate between density grades without PCB redesign.

Part Number Decoder: XCKU095-2FFVA1156I

Understanding the part number breakdown helps in selecting the correct variant:

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Applications and Use Cases

The XCKU095-2FFVA1156I is purpose-built for compute-intensive, high-bandwidth applications across multiple industries:

Wireless and 5G Infrastructure

The combination of 2,760 DSP slices, high Block RAM capacity, and 16.3 Gb/s GTH transceivers makes this device ideal for 5G baseband processing, including forward error correction (FEC), massive MIMO beamforming, and CPRI/eCPRI fronthaul interfaces.

High-Performance Computing (HPC) Acceleration

Used as a PCIe-attached accelerator in data center platforms, the XCKU095 can offload workloads such as database query acceleration, real-time data compression, and financial analytics from host CPUs.

Defense and Aerospace Systems

The Industrial temperature grade (–40°C to +100°C) and proven UltraScale reliability make this FPGA suitable for radar signal processing, electronic warfare (EW) systems, and secure communications platforms that demand long lifecycle support.

Test and Measurement Equipment

High-channel-count instruments benefit from the XCKU095’s large I/O count, flexible transceiver support, and fine-grained clock management, enabling wideband signal capture and protocol analysis.

Wired Networking and Packet Processing

With PCIe Gen3 ×8 hard blocks and high-speed GTH links, the device supports 40G/100G Ethernet line cards, deep packet inspection (DPI), and network function virtualization (NFV) platforms.

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Comparison: XCKU095-2FFVA1156I vs. Related Kintex UltraScale Variants

The XCKU095 sits above the XCKU060 in logic density and Block RAM capacity while sharing the same package footprint — making it a natural upgrade path for designs that have exhausted the XCKU060’s resources.

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Design Tool Support

The XCKU095-2FFVA1156I is fully supported by the AMD Vivado Design Suite (version 2015.3 and later). Vivado provides:

• RTL synthesis, implementation, and bitstream generation
• Integrated logic analyzer (ILA) for in-system debugging
• IP Integrator for block design-based development
• Power estimation via Xilinx Power Estimator (XPE)
• Partial reconfiguration support for dynamic FPGA updates

For timing closure in -2 speed grade designs, Vivado’s incremental compile and physical optimization features help achieve demanding timing constraints at 500+ MHz clock rates.

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Compliance and Reliability

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Summary: Why Choose the XCKU095-2FFVA1156I?

The XCKU095-2FFVA1156I delivers a compelling combination of logic density (1.17M cells), DSP throughput (2,760 slices), high-speed serial connectivity (20× GTH @ 16.3 Gb/s), and generous on-chip memory (60,518 Kbits Block RAM) — all within an industrial-grade 1156-ball BGA package. Its 20nm UltraScale architecture offers significantly better performance-per-watt than previous 28nm Kintex-7 devices, and its footprint compatibility with other A1156-package devices simplifies board-level design scalability.

For engineers designing 5G radios, HPC accelerators, radar systems, or high-speed networking equipment, the XCKU095-2FFVA1156I represents one of the most versatile mid-to-high density FPGAs in the AMD portfolio.