XC7VX485T-2FFG1761I vs XC7VX690T-2FFG1761I Comparison

ElecSuppliers Part Number ComparisonAug 23, 2026

XC7VX485T-2FFG1761I and XC7VX690T-2FFG1761I are high-performance Virtex-7 XT FPGAs designed for applications that require substantial programmable logic, high-speed processing and extensive connectivity.

Both devices use the -2 speed grade, industrial temperature grade and FFG1761 package family. The major difference is FPGA capacity. XC7VX690T provides considerably more logic cells, DSP slices, internal memory and I/O than XC7VX485T.

For engineers choosing between these two devices, the decision is mainly about how much FPGA resource the design actually needs.

XC7VX485T-2FFG1761I vs XC7VX690T-2FFG1761I

The XC7VX485T provides 485,760 logic cells, while XC7VX690T increases this to 693,120 logic cells.

The larger XC7VX690T also provides 3,600 DSP slices, compared with 2,800 DSP slices on XC7VX485T.

Internal memory increases from approximately 37,080 Kb to 52,920 Kb.

The difference is substantial enough that XC7VX690T is better suited to designs with multiple parallel processing blocks, larger data buffers or more demanding FPGA architectures.

Logic Capacity

XC7VX485T offers a large amount of programmable logic and can support complex FPGA designs.

Its 485,760 logic cells are suitable for many communication, signal-processing and data-processing applications.

XC7VX690T moves to a higher resource level with 693,120 logic cells.

The additional logic can be useful when an existing XC7VX485T design is approaching high utilization or when a new product requires several processing functions to operate simultaneously.

For a design with extensive control logic, multiple interfaces and embedded processing functions, the additional capacity can also provide more room for future expansion.

DSP Resources

DSP capacity is an important distinction between these two FPGAs.

XC7VX485T includes 2,800 DSP slices, while XC7VX690T includes 3,600.

That gives XC7VX690T 800 additional DSP slices for parallel mathematical processing.

This difference can matter in applications involving digital filtering, FFT processing, image processing, wireless communications and other workloads that make extensive use of multiplication and accumulation operations.

If DSP utilization is already close to the limit on XC7VX485T, the larger XC7VX690T can provide significantly more architectural flexibility.

Internal Memory

XC7VX690T also has a larger block RAM resource than XC7VX485T.

XC7VX485T provides approximately 37 Mb of memory, while XC7VX690T provides approximately 53 Mb.

Additional internal memory can be valuable for buffering high-speed data streams.

It can also be used for lookup tables, FIFO structures, intermediate processing results and embedded processor applications.

For systems where external memory access could become a bottleneck, having more on-chip memory can simplify the architecture.

I/O Resources

The two devices also differ in available I/O capacity.

The XC7VX485T FFG1761 version supports up to 700 user I/O, while the XC7VX690T FFG1761 version supports up to 850.

The additional I/O can be useful in large systems that connect the FPGA to multiple external interfaces.

Applications involving memory devices, data converters, communication hardware and multiple parallel interfaces may benefit from the additional I/O capacity of XC7VX690T.

FFG1761 Package

Both XC7VX485T-2FFG1761I and XC7VX690T-2FFG1761I use the FFG1761 package family.

This makes them an interesting pair for capacity comparisons because the package designation is shared.

However, engineers should not assume that identical package naming means the devices are automatically interchangeable.

The exact pin assignment, I/O bank configuration, power requirements and PCB routing should be checked before attempting a device migration.

A larger FPGA may also use certain package resources differently from a smaller member of the family.

Industrial Temperature Grade

Both part numbers end with I, indicating an industrial temperature grade.

This makes the two devices suitable for applications where the FPGA needs to operate across a wider temperature range than a commercial-grade component.

Since both parts have the same general temperature classification, temperature is not the primary reason to choose one over the other.

The more important differences are FPGA capacity, DSP resources, memory and I/O.

Same Speed Grade

Another important point is that both devices use the -2 speed grade.

This means the comparison is primarily about resource capacity rather than selecting between different speed grades.

For engineers working on a design that already uses XC7VX485T-2, moving to XC7VX690T-2 can therefore provide more resources without changing the basic speed-grade category.

Timing still needs to be verified after migration because implementation results can change when the device and resource distribution change.

XC7VX485T-2FFG1761I for Resource-Efficient Designs

XC7VX485T can be the better choice when the design fits comfortably within its available resources.

There is little reason to use a larger FPGA simply because more logic is available.

A design with moderate logic utilization, manageable DSP requirements and sufficient internal memory can use XC7VX485T efficiently.

It can also provide a reasonable amount of design margin without moving to the larger XC7VX690T.

XC7VX690T-2FFG1761I for Larger FPGA Designs

XC7VX690T becomes more attractive when resource utilization is the main limitation.

The additional logic cells can support larger processing architectures, while the extra DSP slices are useful for parallel signal processing.

The larger memory capacity can also reduce pressure on external memory resources.

For products expected to receive additional functionality over time, the larger device can provide useful headroom.

XC7VX485T vs XC7VX690T for Signal Processing

For DSP-intensive applications, XC7VX690T has a clear resource advantage.

Its 3,600 DSP slices allow a greater number of parallel operations to be implemented directly in dedicated DSP hardware.

This can benefit applications such as radar processing, communications, video processing and real-time signal analysis.

XC7VX485T remains suitable when the DSP architecture fits within its 2,800 available slices.

The right choice should therefore be based on actual DSP utilization rather than the nominal FPGA size.

XC7VX485T vs XC7VX690T for Data Processing

Large data-processing systems can benefit from the combination of additional logic and memory available in XC7VX690T.

The larger device can accommodate more processing pipelines and larger internal buffers.

This can be useful when several data streams need to be processed simultaneously.

XC7VX485T can still be preferable when the application has a smaller data-processing workload and does not need the additional resources.

Can XC7VX485T-2FFG1761I Replace XC7VX690T-2FFG1761I?

A smaller XC7VX485T cannot automatically replace XC7VX690T.

The first question is resource utilization.

If an existing XC7VX690T design uses more logic, DSP, memory or I/O than XC7VX485T provides, migration would require substantial redesign.

If the XC7VX690T is significantly underutilized, however, a migration may be possible.

The FPGA design should be synthesized and implemented on XC7VX485T before making a production decision. Logic utilization, DSP utilization, memory usage, I/O requirements and timing should all be checked.

Can XC7VX690T-2FFG1761I Replace XC7VX485T-2FFG1761I?

The XC7VX690T provides more resources, so migration in this direction may be more practical from a capacity perspective.

However, it should not automatically be treated as a drop-in replacement.

The PCB must support the selected device, and the power supply, configuration circuitry, I/O banks and pin assignments need to be verified.

If the existing board was designed specifically for XC7VX485T, a larger FPGA may require PCB changes even when the package family is similar.

Which One Should You Choose?

Choose XC7VX485T-2FFG1761I when the design has moderate resource requirements and the available logic, DSP, memory and I/O are sufficient.

Choose XC7VX690T-2FFG1761I when the design requires substantially more FPGA capacity or when additional resource margin is important.

For a new design, it is generally better to estimate the expected resource utilization first and then select the smallest device that provides sufficient capacity with reasonable development margin.

XC7VX485T-2FFG1761I vs XC7VX690T-2FFG1761I

The key difference can be summarized simply.

XC7VX485T-2FFG1761I

485,760 logic cells
2,800 DSP slices
37,080 Kb memory
Up to 700 I/O
-2 speed grade
Industrial temperature grade

XC7VX690T-2FFG1761I

693,120 logic cells
3,600 DSP slices
52,920 Kb memory
Up to 850 I/O
-2 speed grade
Industrial temperature grade

XC7VX690T-2FFG1761I is the stronger choice when FPGA resource capacity is the priority. XC7VX485T-2FFG1761I is more appropriate when its available resources are already sufficient and a smaller-capacity solution is preferred.

For replacement projects, always verify the complete package, pinout, power requirements, I/O configuration and FPGA timing before changing between the two devices.