The XCKU040-1FBVA676I is a high-performance Field Programmable Gate Array (FPGA) from AMD Xilinx, part of the renowned Kintex UltraScale family. Built on a cutting-edge 20nm process node, this device delivers an exceptional balance of performance, power efficiency, and cost — making it one of the most versatile mid-range FPGAs available today. Whether you are designing for wireless communications, video processing, defense electronics, or industrial automation, the XCKU040-1FBVA676I is engineered to meet demanding system requirements.

As a leading Xilinx FPGA solution, this device leverages the UltraScale architecture to push performance boundaries while cutting system power consumption and BOM cost.

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What Is the XCKU040-1FBVA676I?

The XCKU040-1FBVA676I is an industrial-grade Kintex UltraScale FPGA packaged in a compact 676-pin FCBGA (Flip-Chip Ball Grid Array) format. The part number encodes key device characteristics:

This device is currently in active production status, fully RoHS compliant, and supported by AMD Xilinx’s Vivado Design Suite.

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XCKU040-1FBVA676I Key Specifications

Core Logic Resources

Memory Resources

I/O and Connectivity

Clocking and Signal Integrity

Environmental and Compliance

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XCKU040-1FBVA676I Architecture Overview

## UltraScale Architecture: Built for Next-Generation Performance

The XCKU040-1FBVA676I is based on AMD Xilinx’s UltraScale architecture, which was developed to address the performance limitations of previous-generation FPGAs while delivering significant power savings. The architecture uses both monolithic die technology and Stacked Silicon Interconnect (SSI) technology, enabling unprecedented routing efficiency and signal integrity.

Key architectural highlights include:

• Next-generation routing with abundant low-latency interconnect that eliminates the bottlenecks found in prior-generation Xilinx devices
• Clock region segmentation for flexible, high-performance, low-power clock distribution
• Advanced CLB structure — each Configurable Logic Block contains 8 LUTs and 16 flip-flops, with SLICEM blocks supporting distributed RAM and shift registers

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

Each CLB in the XCKU040-1FBVA676I contains one slice with 8 six-input LUTs and 16 flip-flops. LUTs in SLICEM slices can be configured as:

• 64-bit distributed RAM
• 32-bit shift registers (SRL32)
• Two SRL16 shift registers

This flexibility allows designers to optimize logic density and reduce external memory requirements.

### DSP Slices for High-Speed Signal Processing

The device incorporates high-performance DSP slices featuring:

• 27-bit pre-adder
• 27×18 multiplier core
• 96-bit wide XOR functionality
• 30-bit A input
• Support for multiply-accumulate, multiply-add, and pattern detect operations

These DSP resources make the XCKU040-1FBVA676I an excellent choice for radar signal processing, digital communications, image processing, and other computationally intensive applications.

### Block RAM with FIFO and ECC Support

The integrated block RAM provides 36Kb dual-port RAM blocks, each configurable as two independent 18Kb blocks. Built-in FIFO and Error-Correcting Code (ECC) support ensures data integrity in mission-critical applications without consuming additional fabric resources.

### High-Performance I/O Banks

With 312 user I/Os in HP (High-Performance) banks, the XCKU040-1FBVA676I supports a wide range of I/O voltage standards from 1.2V to 1.8V. HP I/O banks provide superior signal integrity for high-speed memory interfaces such as DDR4 and LPDDR4, as well as high-speed serial interfaces.

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XCKU040-1FBVA676I Package Information

## 676-Pin FCBGA Package Details

The XCKU040-1FBVA676I is housed in a 676-pin Flip-Chip Ball Grid Array (FCBGA), providing a compact footprint for board-level integration. Key package characteristics include:

A significant advantage of the Kintex UltraScale family is footprint compatibility: packages with the same last letter-number sequence (e.g., B676) are pin-compatible across different UltraScale-based devices, simplifying design scalability and migration.

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Power Supply and Operating Conditions

## Voltage Rails and Power Architecture

The XCKU040-1FBVA676I features a sophisticated multi-rail power architecture designed to minimize total system power:

The -1 speed grade operates at VCCINT = 0.95V. The UltraScale architecture supports numerous power optimization options, including per-bank I/O voltage control and fine-grained clock gating via BUFGCE and BUFGCE_DIV primitives.

Designers can use the Xilinx Power Estimator (XPE) tool to accurately estimate power consumption during the design phase.

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Configuration and Security Features

## FPGA Configuration Methods

The XCKU040-1FBVA676I supports multiple configuration modes to suit different system designs:

• Master SPI – using external SPI flash (e.g., Micron MT25QU256)
• Master BPI – parallel NOR flash interface
• JTAG – boundary scan and in-system programming
• Slave Serial / Slave SelectMAP – processor-driven configuration

Configuration security features include bitstream encryption (AES-256) and authentication, protecting IP from cloning and reverse engineering.

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Development Tools and Ecosystem

## Vivado Design Suite Support

The XCKU040-1FBVA676I is fully supported by AMD Xilinx’s Vivado Design Suite, which provides:

• Synthesis and implementation with UltraScale-optimized algorithms
• Timing closure assistance via advanced placement and routing engines
• IP Integrator for block-based design
• Partial reconfiguration support
• Integrated Logic Analyzer (ILA) for in-system debugging

For evaluation and prototyping, AMD Xilinx offers the KCU105 Evaluation Kit (part number EK-U1-KCU105-G), which is based on the XCKU040 family and provides a ready-made platform for rapid development.

### Compatible Programming Hardware

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Typical Applications of the XCKU040-1FBVA676I

## Where Is This FPGA Used?

The XCKU040-1FBVA676I’s combination of 530,250 logic cells, 312 I/Os, 630 MHz performance, and industrial-grade rating makes it ideal for a broad range of demanding applications:

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XCKU040-1FBVA676I vs. Related Kintex UltraScale Variants

## Device Comparison Table

The -1FBVA676I variant is specifically chosen when:

• Industrial temperature operation (–40°C to +100°C) is required
• A compact 676-pin BGA footprint is preferred over larger packages
• Standard (-1) speed grade performance meets timing requirements
• Cost optimization is a priority versus higher-pin-count packages

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Ordering Information

## How to Order the XCKU040-1FBVA676I

Note: The XCKU040-1FBVA676I is subject to US export control regulations. Buyers should verify Export Administration Regulations (EAR) compliance prior to purchase, particularly for defense and aerospace applications.

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Frequently Asked Questions (FAQ)

## XCKU040-1FBVA676I FAQ

Q: What is the difference between the XCKU040-1FBVA676I and XCKU040-1FBVA676C? The only difference is the temperature grade. The “I” suffix denotes the Industrial temperature range (–40°C to +100°C), while “C” indicates Commercial grade (0°C to +85°C). All other specifications — logic resources, I/O count, speed grade, and package — are identical.

Q: Is the XCKU040-1FBVA676I footprint compatible with other Kintex UltraScale devices? Yes. AMD Xilinx designed the UltraScale package family for footprint compatibility. The FBVA676 package is pin-compatible with other UltraScale devices using the same package suffix, enabling scalable design reuse.

Q: What programming tool is required for the XCKU040-1FBVA676I? The device is programmed using the Vivado Design Suite (v2015.4 or later required for production use). JTAG-based programming via the Digilent JTAG-SMT2-NC module or similar JTAG tools is fully supported.

Q: Does the XCKU040-1FBVA676I support partial reconfiguration? Yes. The UltraScale architecture natively supports Dynamic Partial Reconfiguration (DPR), allowing portions of the FPGA fabric to be reconfigured while the rest of the device continues to operate normally.

Q: What memory interfaces does this FPGA support? The HP I/O banks on the XCKU040-1FBVA676I support high-speed memory interfaces including DDR4, DDR3L, LPDDR4, and QDR SRAM, making it suitable for memory-intensive signal processing and computing applications.