The XCKU040-L1SFVA784I is a high-performance, low-power Xilinx FPGA from the Kintex® UltraScale™ family, manufactured by AMD (formerly Xilinx). Designed for demanding applications that require an optimal balance between processing power and power efficiency, this device is built on a 20nm process node and features the low-voltage -1L speed grade — making it the preferred choice for power-sensitive embedded, industrial, and communications designs.

Whether you are an FPGA engineer sourcing components, a purchasing manager comparing part numbers, or a designer evaluating the XCKU040 family, this comprehensive guide covers everything you need to know about the XCKU040-L1SFVA784I specifications, features, applications, and alternatives.

---

What Is the XCKU040-L1SFVA784I?

The XCKU040-L1SFVA784I is a Field Programmable Gate Array (FPGA) from AMD’s Kintex UltraScale series. The part number breaks down as follows:

The “L” in the -1L speed grade is significant: these devices are screened for lower maximum static power consumption and can operate at a VCCINT of 0.90V — reducing dynamic and static power versus standard -1 parts while maintaining the same timing performance at 0.95V.

---

XCKU040-L1SFVA784I Key Specifications

Core Logic Resources

Memory Resources

DSP and Compute Resources

I/O and Connectivity

Power and Electrical

Ordering and Packaging Information

---

XCKU040-L1SFVA784I Features and Advantages

H3: Low-Power -1L Speed Grade for Energy-Efficient Designs

The -1L speed grade is one of the most important differentiators of the XCKU040-L1SFVA784I. Unlike the standard -1 or -2 speed grades, the -1L device supports dual VCCINT operating voltages:

• At 0.95V: performance is identical to the standard -1 speed grade
• At 0.90V: static power is further reduced, making it ideal for battery-powered, thermally constrained, or fanless systems

This flexibility gives design engineers precise control over the performance-versus-power trade-off without changing the PCB layout.

H3: High-Density Logic Fabric with UltraScale Architecture

Built on Xilinx’s UltraScale ASMBL (Advanced Silicon Modular Block) architecture, the XCKU040 fabric supports:

• Pipelined routing fabric enabling faster clock frequencies
• LUT-based logic with wider adder chains for arithmetic-heavy designs
• Cascade connections for deep logic without routing penalties
• Large flip-flop arrays ideal for register-heavy state machines and pipelining

H3: 784-Pin FCBGA Package for Space-Constrained PCB Designs

The SFVA784 package (Small Form Factor, Flip-Chip BGA, 784 balls, 23×23mm, 0.8mm ball pitch) is a compact packaging option within the XCKU040 family. Compared to the larger 1156-ball packages, the 784-ball variant enables:

• Smaller PCB footprint
• Reduced board complexity
• Lower routing density requirements on PCB layers
• Compatible routing and pinout with other UltraScale devices in the same package

H3: High-Speed Serial Transceivers (GTH) up to 16.3 Gb/s

The XCKU040-L1SFVA784I includes 16 GTH transceivers, supporting a wide range of high-speed serial protocols:

These transceivers are critical for wired communications, radar signal processing, and high-bandwidth data links.

H3: Industrial Temperature Grade for Harsh Environments

With an operating junction temperature range of -40°C to +100°C, the XCKU040-L1SFVA784I meets the requirements of industrial-grade deployments including:

• Outdoor telecommunications equipment
• Industrial automation and motor control
• Military and aerospace test equipment
• Medical imaging and diagnostics

---

XCKU040-L1SFVA784I Typical Applications

The XCKU040-L1SFVA784I is widely used across multiple verticals due to its combination of DSP density, transceiver bandwidth, and low-power operation:

H3: Wired and Wireless Communications Infrastructure

• 4G LTE and 5G NR baseband processing
• CPRI/eCPRI fronthaul interfaces
• Packet processing and deep packet inspection (DPI)
• 100G Ethernet line cards

H3: Defense, Aerospace, and Radar

• Synthetic aperture radar (SAR) signal processing
• Electronic warfare (EW) signal intelligence
• Secure communications with TEMPEST requirements
• Avionics data processing

H3: High-Performance Computing and Data Centers

• Hardware accelerators for machine learning inference
• Network interface cards (SmartNICs)
• PCIe Gen3 offload engines
• Compression and encryption acceleration

H3: Test and Measurement Equipment

• Protocol analyzers (PCIe, Ethernet, SATA)
• High-speed data acquisition systems
• Signal generation and emulation platforms
• BERT (Bit Error Rate Testers)

H3: Industrial Automation and Machine Vision

• Real-time image processing pipelines
• Motor control with multi-axis coordination
• PLC replacement with deterministic timing
• Industrial Ethernet (EtherCAT, PROFINET)

---

XCKU040-L1SFVA784I vs. Other XCKU040 Variants

The XCKU040 family is available in multiple speed grades and packages. The table below shows how the XCKU040-L1SFVA784I compares to close alternatives:

Choosing between variants: If your design is I/O-constrained (≤468 user I/O) and power efficiency is critical, the XCKU040-L1SFVA784I is the optimal choice. If you need more than 468 I/Os, consider the 1156-ball package variants.

---

Design Tool Support: Vivado Design Suite

The XCKU040-L1SFVA784I is fully supported by the AMD Vivado Design Suite, including:

• Vivado ML Edition (free tier available for smaller projects)
• Synthesis, implementation, and timing closure tools
• IP Integrator for block design methodology
• Partial reconfiguration support
• Vivado Simulator for RTL and post-implementation simulation

For programming and debug, the device supports JTAG-based configuration via the Digilent JTAG-SMT2-NC (part 410-308-B) and other compatible programming cables.

---

Evaluation and Development Boards for XCKU040

Engineers looking to prototype with the XCKU040 can choose from several development platforms:

---

Frequently Asked Questions (FAQ)

H3: What does the “L1” in XCKU040-L1SFVA784I mean?

The L1 denotes the -1L low-voltage speed grade. This variant can operate at 0.90V VCCINT (versus 0.95V for standard parts), reducing static and dynamic power consumption. At 0.95V, the -1L delivers the same performance as a standard -1 speed grade device.

H3: Is the XCKU040-L1SFVA784I RoHS compliant?

Yes. The XCKU040-L1SFVA784I is RoHS compliant and uses lead-free solder ball technology in the FCBGA package.

H3: What is the pin pitch of the 784-ball SFVA package?

The SFVA784 package uses a 0.8mm ball pitch, compared to the 1.0mm pitch of the larger FFVA packages. This allows a more compact PCB footprint but requires tighter PCB design rules.

H3: Can the XCKU040-L1SFVA784I be used for machine learning acceleration?

Yes. With 1,920 DSP48E2 slices capable of 27×18 multiplications and up to 21.6 Mb of on-chip BRAM, the device is well-suited for deploying quantized neural network inference (e.g., INT8 or INT16 precision) using frameworks like Xilinx Vitis AI.

H3: What high-speed interfaces does the XCKU040-L1SFVA784I support?

The device supports PCIe Gen3 (x8), 100G Ethernet MAC, Interlaken, and 16 GTH transceivers at up to 16.3 Gb/s — covering most modern high-bandwidth I/O standards.

---

Summary

The XCKU040-L1SFVA784I is a versatile, power-efficient FPGA that delivers high logic density (530K cells), extensive memory (21.6 Mb BRAM), 1,920 DSP slices, and 16 GTH transceivers in a compact 784-ball industrial-grade package. The -1L speed grade makes it uniquely suited for designs that must balance compute performance with strict power budgets, particularly in communications, defense, industrial, and data center applications.

Its full support within the AMD Vivado ecosystem, combined with wide availability from authorized distributors, makes the XCKU040-L1SFVA784I a reliable long-lifecycle component for both prototyping and production deployments.