The XCKU040-L1FBVA900I is a high-performance, low-power Xilinx FPGA from the Kintex® UltraScale™ family, manufactured by AMD (formerly Xilinx). Designed for applications demanding the best price-to-performance ratio at the 20nm process node, this device delivers an exceptional blend of logic density, signal processing bandwidth, and power efficiency — all in a compact 900-pin FCBGA package.
Whether you are developing wireless communications infrastructure, industrial control systems, data center acceleration, or embedded vision pipelines, the XCKU040-L1FBVA900I provides the programmable logic resources, transceivers, and low-power operation needed to bring your design to production.
What Is the XCKU040-L1FBVA900I?
The XCKU040-L1FBVA900I belongs to AMD’s Kintex UltraScale FPGA family, which occupies the mid-range tier of the UltraScale architecture portfolio. The part number breaks down as follows:
| Part Number Segment |
Meaning |
| XCKU040 |
Kintex UltraScale, 40-series density |
| -L1 |
Low-power (-1L) speed grade; supports dual VCCINT (0.95V or 0.90V) |
| FBVA |
Flip-Chip Ball Grid Array, commercial-grade package variant |
| 900 |
900-pin package |
| I |
Industrial temperature range (–40°C to +100°C) |
The “-L1” speed grade is a standout feature: it operates at VCCINT = 0.95V with the same timing performance as the standard -1 grade, yet can be configured at VCCINT = 0.90V for a reduced power envelope — making this part ideal for thermally constrained or battery-sensitive applications.
XCKU040-L1FBVA900I Key Specifications
Core Logic and Fabric Resources
| Parameter |
Value |
| FPGA Family |
Kintex UltraScale |
| Process Technology |
20nm |
| Logic Cells |
424,200 |
| CLB Flip-Flops |
530,250 |
| CLB LUTs |
242,400 |
| Distributed RAM (Kb) |
3,456 |
| Block RAM (Kb) |
21,600 |
| Block RAM Blocks (36Kb) |
600 |
| UltraRAM Blocks |
0 (available in UltraScale+) |
| DSP Slices |
1,920 |
I/O and Connectivity
| Parameter |
Value |
| Package |
900-Pin FCBGA (FBVA900) |
| User I/O Pins |
468 |
| Differential I/O Pairs |
234 |
| GTH Transceivers (16.3 Gb/s) |
20 |
| Maximum Transceiver Bandwidth |
~326 Gb/s aggregate |
| PCIe Hard IP Blocks |
2 (Gen3 x8) |
| 100G Ethernet MAC |
Yes |
| Interlaken Support |
150G |
Clock Management and Memory Interfaces
| Parameter |
Value |
| MMCM (Mixed-Mode Clock Manager) |
8 |
| PLL |
8 |
| Max Operating Frequency |
725 MHz (internal logic) |
| Supported Memory Interfaces |
DDR3, DDR4, LPDDR3, QDR II+, RLDRAM 3 |
Electrical and Thermal Characteristics
| Parameter |
Value |
| Speed Grade |
-1L (Low Power) |
| VCCINT Options |
0.95V (standard performance) / 0.90V (low-power mode) |
| VCCAUX |
1.8V |
| I/O Supply Voltage (VCCO) |
1.2V – 3.3V (bank-configurable) |
| Operating Temperature |
–40°C to +100°C (Industrial) |
| Package Type |
Flip-Chip BGA |
| Package Dimensions |
31mm × 31mm |
| RoHS Compliant |
Yes |
XCKU040-L1FBVA900I Speed Grade: Understanding the -1L Advantage
The -1L speed grade is a key differentiator of the XCKU040-L1FBVA900I. Unlike conventional speed grades, the -1L operates at two validated VCCINT voltages:
- At VCCINT = 0.95V: Performance is equivalent to the standard -1 speed grade, with no timing derating.
- At VCCINT = 0.90V: Static power is significantly reduced, with a slight reduction in maximum operating frequency — ideal for power-critical deployments.
This dual-voltage flexibility gives design teams the ability to optimize power consumption at the system level without swapping components between board revisions.
XCKU040-L1FBVA900I vs. Similar Kintex UltraScale Variants
The XCKU040 is available in multiple speed grades and packages. The table below compares the most common variants to help you select the right part:
| Part Number |
Speed Grade |
Package |
Temperature |
Use Case |
| XCKU040-L1FBVA900I |
-1L (Low Power) |
900 FCBGA |
Industrial |
Low-power industrial / embedded |
| XCKU040-1FBVA900I |
-1 (Standard) |
900 FCBGA |
Industrial |
General-purpose industrial |
| XCKU040-2FBVA900I |
-2 (High Speed) |
900 FCBGA |
Industrial |
High-performance industrial |
| XCKU040-3FBVA900E |
-3 (Max Speed) |
900 FCBGA |
Commercial |
Maximum performance, commercial |
| XCKU040-1FBVA900C |
-1 (Standard) |
900 FCBGA |
Commercial |
Commercial / consumer grade |
| XCKU040-1SFVA784I |
-1 (Standard) |
784 SFBGA |
Industrial |
Smaller form factor option |
Note: The “L” suffix in -1L indicates the low-power screened variant, uniquely suited for applications where reducing total system power is a design priority.
Kintex UltraScale Architecture: What Makes It Different
The XCKU040-L1FBVA900I is built on AMD’s UltraScale architecture, which introduces several innovations over the previous 7-series generation:
Advanced Routing and Logic
The UltraScale architecture adopts an ASIC-like routing methodology, eliminating the routing bottlenecks present in earlier Xilinx FPGAs. The result is higher utilization efficiency and faster timing closure for complex designs.
High-Density DSP Processing
With 1,920 DSP48E2 slices, the XCKU040 is built for compute-intensive workloads. Each DSP slice can perform a 27×18 multiply-accumulate in a single clock cycle. This makes the device exceptionally well-suited for:
- Digital signal processing (radar, sonar, SDR)
- Machine learning inference at the edge
- High-speed financial analytics
- Image and video processing pipelines
Next-Generation GTH Transceivers
The XCKU040 integrates 20 GTH transceivers capable of operating up to 16.3 Gb/s per lane. These transceivers support a wide range of industry-standard protocols including:
- PCIe Gen3 (up to x8 per hard block)
- 10GbE / 25GbE
- CPRI / OBSAI (wireless fronthaul)
- SATA / SAS
- Aurora 64B/66B
Hard PCIe Gen3 IP
Two integrated PCIe Gen3 x8 hard blocks provide plug-and-play host and endpoint connectivity, reducing LUT utilization and saving months of soft-IP integration effort.
100G Ethernet and 150G Interlaken
For high-throughput networking applications, the XCKU040 features hard 100G Ethernet MAC and 150G Interlaken cores — enabling line-rate networking with minimal FPGA fabric overhead.
XCKU040-L1FBVA900I Applications
The XCKU040-L1FBVA900I is deployed across a wide range of demanding application domains:
Wireless and 5G Communications
- Remote Radio Units (RRUs) and baseband processing
- CPRI/eCPRI fronthaul aggregation
- Massive MIMO beamforming
Defense and Aerospace
- Radar and Electronic Warfare (EW) signal processing
- Software-Defined Radio (SDR)
- Secure, industrial-temperature embedded computing
Industrial Automation
- Real-time motor control and motion coordination
- Machine vision and defect detection
- Industrial Ethernet (EtherCAT, PROFINET)
Data Center and Networking
- SmartNIC and network function virtualization (NFV)
- Low-latency packet processing and deep packet inspection
- Storage acceleration (NVMe-oF)
Test and Measurement
- High-speed data acquisition and protocol analysis
- Waveform generation and RF test equipment
Development Tools for the XCKU040-L1FBVA900I
AMD provides a full suite of design and implementation tools compatible with all Kintex UltraScale devices:
| Tool |
Purpose |
| Vivado Design Suite |
RTL synthesis, implementation, bitstream generation |
| Vitis HLS |
High-Level Synthesis (C/C++ to RTL) |
| Vitis Unified IDE |
Application and kernel development |
| Xilinx Power Estimator (XPE) |
Pre-silicon power analysis |
| ChipScope Pro / ILA |
On-chip debug and logic analysis |
Vivado 2015.4 or later is required for production support of the XCKU040 device family. For VCCINT = 0.90V (-1LV) operation, the Vivado tool must be configured accordingly.
XCKU040-L1FBVA900I Ordering and Availability
| Attribute |
Detail |
| Manufacturer |
AMD (Xilinx) |
| Part Number |
XCKU040-L1FBVA900I |
| DigiKey Part Number |
6592312 |
| Package |
900-Pin FCBGA |
| Status |
Active |
| RoHS |
Compliant |
| Minimum Order Quantity |
1 |
| Temperature Grade |
Industrial (–40°C to +100°C) |
Frequently Asked Questions (FAQ)
What is the difference between XCKU040-L1FBVA900I and XCKU040-1FBVA900I?
The key difference is the speed grade. The -L1 variant is a low-power screened device that supports dual VCCINT operation (0.95V for standard performance, or 0.90V for reduced power). The -1 variant operates at a fixed 0.95V VCCINT. Both deliver equivalent timing performance at 0.95V, but the -1L offers a power-saving mode not available in the standard -1.
Is the XCKU040-L1FBVA900I pin-compatible with other XCKU040 variants?
Yes. All XCKU040 devices sharing the FBVA900 package footprint are pin-compatible, enabling seamless performance or power-grade migration without PCB redesign.
What memory interfaces does the XCKU040 support?
The XCKU040 supports DDR3, DDR4, LPDDR3, QDR II+, and RLDRAM 3 through its flexible SelectIO banks. Memory interface IP is available through Vivado’s MIG (Memory Interface Generator).
Is the XCKU040-L1FBVA900I suitable for safety-critical applications?
The industrial temperature grade (–40°C to +100°C) makes it appropriate for harsh environments. For functional safety (ISO 26262, IEC 61508), AMD provides a Safety Design Flow for UltraScale devices. Consult AMD’s functional safety documentation for specific certification status.
What is the maximum transceiver data rate for the XCKU040?
The GTH transceivers in the XCKU040 support up to 16.3 Gb/s per lane, with 20 lanes available in the FBVA900 package, yielding up to ~326 Gb/s aggregate transceiver bandwidth.
Summary
The XCKU040-L1FBVA900I is a production-ready, industrial-grade FPGA that combines high DSP bandwidth, advanced transceiver technology, integrated hard PCIe and 100G Ethernet IP, and a uniquely flexible low-power speed grade — all in a well-supported, ecosystem-rich platform. It is the ideal choice for engineers designing power-conscious yet high-performance embedded, communications, and computing systems at the 20nm node.
For full pin-out diagrams, timing constraints, and power analysis tools, refer to AMD’s official Kintex UltraScale documentation via the Vivado Design Suite or the AMD/Xilinx technical documentation portal.
