XC7VX485T-1FFG1761I vs XC7VX690T-1FFG1761I Comparison

ElecSuppliers Part Number ComparisonAug 23, 2026

XC7VX485T-1FFG1761I and XC7VX690T-1FFG1761I are both Virtex-7 XT FPGAs designed for high-performance programmable logic applications. They use the same FFG1761 package family and industrial temperature grade, but the XC7VX690T provides substantially more FPGA resources.

For engineers choosing between the two devices, the key question is whether the additional logic, DSP, memory and I/O capacity of the XC7VX690T is actually required by the design.

XC7VX485T vs XC7VX690T

The two devices are based on the same Virtex-7 XT architecture, but they occupy different performance and capacity levels within the family.

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

The difference becomes even more significant for DSP-intensive designs. XC7VX485T provides 2,800 DSP slices, compared with 3,600 DSP slices on XC7VX690T.

Memory capacity also increases from approximately 37,080 Kb to 52,920 Kb.

This makes XC7VX690T a better fit for designs that need substantial parallel processing, large data buffers or a greater number of computational resources.

Logic Resources

The XC7VX485T provides enough logic capacity for many large FPGA designs, including digital signal processing, communications and high-speed data-processing applications.

XC7VX690T moves into a higher resource category, providing roughly 43% more logic cells than XC7VX485T.

This additional capacity can be valuable when a design contains multiple processing pipelines, large control architectures or several high-speed interfaces.

It can also provide more room for future firmware and hardware revisions.

DSP Capacity

DSP resources are one of the clearest differences between the two devices.

XC7VX485T includes 2,800 DSP slices.

XC7VX690T provides 3,600 DSP slices.

For applications involving multiplication, filtering, FFT processing, image processing or other parallel mathematical operations, the additional DSP resources can have a significant effect on the overall architecture.

A design that is already approaching the DSP utilization limit of XC7VX485T may benefit from moving to XC7VX690T rather than trying to optimize every remaining DSP resource.

Block RAM and Memory

Memory capacity is another reason to consider XC7VX690T.

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

The additional memory can be useful for:

High-speed data buffering

Signal-processing pipelines

Image and video data

Communication packet storage

Lookup tables

Embedded processor applications

Designs with substantial on-chip buffering may therefore benefit from XC7VX690T even when their logic utilization does not immediately require the larger device.

I/O Capacity

I/O resources also differ between the two devices.

The XC7VX485T FFG1761 version provides up to 700 user I/O connections, while XC7VX690T can provide up to 850.

For complex systems connected to multiple external memory devices, converters, communication interfaces or high-speed peripherals, the additional I/O can make board-level integration easier.

This is particularly useful when the FPGA is being used as the central interface between several independent subsystems.

Same FFG1761 Package Family

One useful aspect of this comparison is the shared FFG1761 package designation.

Both devices are available in the 1761-ball FFG package family, which makes this comparison particularly relevant when evaluating FPGA capacity within a similar package class.

However, engineers should still verify the exact pinout, bank configuration and PCB design before treating one device as a direct replacement for the other.

The same package name does not mean that every FPGA pin has an identical function or electrical capability.

Temperature Grade

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

This makes them suitable for applications where a wider operating temperature range is required.

Because both devices share the same general temperature classification, temperature grade is not the main factor separating these two parts.

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

When XC7VX485T Is the Better Choice

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

Using a smaller FPGA can help avoid paying for processing capacity that the application does not actually need.

It can also make resource planning more straightforward when the design has moderate logic and DSP requirements.

For an established design with comfortable utilization and timing margin, moving to XC7VX690T may provide little practical benefit unless future expansion is expected.

When XC7VX690T Makes More Sense

XC7VX690T becomes more attractive as FPGA resource requirements increase.

It provides more logic cells, DSP slices, memory and I/O, giving designers greater freedom when implementing complex architectures.

This can be particularly useful for high-performance signal processing, communications equipment, image processing and systems with several parallel processing paths.

The larger device can also provide additional design margin for future product revisions.

Can XC7VX485T Replace XC7VX690T?

Not necessarily.

The smaller XC7VX485T has fewer logic cells, DSP slices, memory resources and I/O.

If an existing XC7VX690T design uses resources beyond the capabilities of XC7VX485T, a direct migration is not practical without significant redesign.

If the original design uses only a small portion of the XC7VX690T resources, however, migration may be possible.

The FPGA project should be synthesized and implemented on XC7VX485T to verify resource utilization, timing and I/O requirements before making the change.

Can XC7VX690T Replace XC7VX485T?

From a resource-capacity perspective, XC7VX690T provides considerably more capability.

However, a higher-capacity FPGA is not automatically a drop-in replacement.

The exact package, pinout, power requirements, configuration design and PCB routing must all be checked.

If the design uses the FFG1761 package, the larger FPGA may be worth evaluating as a migration option, but the complete hardware and implementation constraints still need to be verified.

XC7VX485T vs XC7VX690T for DSP Applications

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

Its 3,600 DSP slices allow more parallel mathematical operations than the 2,800 available on XC7VX485T.

This can be important for applications such as radar processing, wireless communications, image processing and real-time signal analysis.

If DSP utilization is already high on XC7VX485T, moving to XC7VX690T can provide additional architectural flexibility.

XC7VX485T vs XC7VX690T for High-Speed Data Processing

Both devices are designed for high-performance FPGA applications, but XC7VX690T provides more resources for systems that need to process larger quantities of data simultaneously.

The combination of additional logic, DSP, memory and I/O makes it more suitable for complex data-processing architectures.

XC7VX485T remains a strong option when the system requirements are lower and the available resources are sufficient.

Choosing Between XC7VX485T and XC7VX690T

The choice should be based on actual FPGA utilization rather than simply selecting the larger device.

Choose XC7VX485T when:

The design fits comfortably within its logic resources.

DSP utilization is moderate.

The available memory is sufficient.

The I/O requirement is within its capacity.

Cost and resource efficiency are important.

Choose XC7VX690T when:

The design requires significantly more logic.

DSP utilization is high.

Larger on-chip memory is needed.

The system requires more FPGA I/O.

Future expansion is expected.

XC7VX485T-1FFG1761I vs XC7VX690T-1FFG1761I

The two devices share the Virtex-7 XT architecture and the FFG1761 package family, but XC7VX690T is substantially larger.

XC7VX485T provides 485,760 logic cells, 2,800 DSP slices and approximately 37 Mb of memory, while XC7VX690T provides 693,120 logic cells, 3,600 DSP slices and approximately 53 Mb of memory.

For a resource-constrained high-performance FPGA design, XC7VX690T offers considerably more room. For a design that already fits efficiently into XC7VX485T, the smaller device may be the more practical choice.

The final selection should therefore be based on logic utilization, DSP requirements, memory usage, I/O requirements and the expected development roadmap rather than FPGA capacity alone.