XC7VX690T-2FFG1926I vs XC7VX980T-2FFG1926I: Virtex-7 FPGA Upgrade

ElecSuppliers Part Number ComparisonAug 17, 2026

The XC7VX690T-2FFG1926I and XC7VX980T-2FFG1926I are high-density Virtex-7 FPGAs for applications that require large programmable logic resources, high-speed processing, substantial embedded memory, and multiple high-speed interfaces.

Both devices use the -2 speed grade and FFG1926 package, while the I suffix identifies the industrial temperature grade.

The XC7VX980T sits above the XC7VX690T in the Virtex-7 product range, providing significantly more programmable logic and internal resources.

XC7VX690T-2FFG1926I

The XC7VX690T provides 693,120 logic cells, making it one of the larger Virtex-7 devices.

According to the 7-Series FPGA device overview, it also provides approximately 52,920 Kb of block RAM, 10,888 DSP slices, and up to 1,000 user I/O depending on package configuration.

This resource level makes the device suitable for demanding FPGA applications such as communications, networking, image processing, radar, instrumentation, and high-speed data processing.

XC7VX980T-2FFG1926I

The XC7VX980T moves to a considerably larger FPGA fabric.

The 7-Series device overview lists approximately 979,200 logic cells, 54,000 Kb of block RAM, and 13,838 DSP slices for the XC7VX980T family.

The larger programmable fabric makes XC7VX980T attractive for applications where the XC7VX690T is approaching its resource limits.

XC7VX690T vs XC7VX980T Specifications

The XC7VX980T provides roughly 41% more logic-cell capacity and about 27% more DSP slices than the XC7VX690T.

Interestingly, the increase in block RAM is much smaller than the increase in logic capacity. This is an important distinction for engineers whose designs are limited by memory rather than LUTs.

Logic Capacity: The Biggest Upgrade

The biggest difference between these devices is programmable logic capacity.

XC7VX690T provides approximately 693K logic cells, while XC7VX980T reaches approximately 979K.

That additional fabric can be useful when an application needs more parallel processing.

A large FPGA design may contain several independent hardware functions running simultaneously. Increasing the number of processing channels can quickly increase LUT and register utilization.

For such designs, the XC7VX980T provides significantly more room before the FPGA becomes resource constrained.

DSP Capacity Also Increases

DSP resources are another major consideration.

The XC7VX690T provides approximately 10,888 DSP slices, while XC7VX980T provides approximately 13,838.

This difference can matter in applications involving:

Digital filters

FFT processing

Wireless algorithms

Image processing

Radar processing

Video processing

Mathematical accelerators

A design that is approaching its DSP limit on XC7VX690T may therefore benefit from the additional DSP resources of XC7VX980T.

More Logic Does Not Mean More Memory

One interesting aspect of this comparison is the relatively small difference in block RAM.

The XC7VX690T has approximately 52,920 Kb, while XC7VX980T has approximately 54,000 Kb.

This means engineers should not assume that moving to XC7VX980T solves every resource problem.

If an existing XC7VX690T design is limited primarily by BRAM, the larger device may not provide the same level of improvement as it does for LUT or DSP utilization.

The actual implementation report should therefore be examined before selecting the upgrade.

Package Considerations

Both compared devices use the FFG1926 package designation.

That makes this pair particularly relevant when evaluating a high-density FPGA migration where maintaining the same package class is important.

However, sharing a package designation does not automatically establish pin-for-pin interchangeability.

The exact device pinout, power connections, I/O banks, clock resources, transceiver assignments, and configuration interfaces must be checked before hardware changes are approved.

Is XC7VX980T a Good XC7VX690T Upgrade?

For designs that are limited by logic or DSP resources, XC7VX980T is a strong upgrade candidate.

The additional programmable fabric can accommodate larger hardware architectures without changing the application to a completely different FPGA family.

This can be useful when a product revision adds:

Additional processing channels

New communication interfaces

More complex algorithms

Hardware acceleration

Larger control logic

Additional parallel data paths

The migration still requires a new implementation and complete timing and hardware validation.

Can XC7VX690T Replace XC7VX980T?

The smaller XC7VX690T should only be considered if the existing XC7VX980T design has sufficient unused resources.

The first step is to examine FPGA utilization.

If the XC7VX980T design uses more than the available logic, DSP, or other resources of XC7VX690T, the downgrade will require architectural changes.

A practical evaluation should check:

LUT utilization

Register utilization

DSP utilization

BRAM utilization

I/O requirements

Clock resources

High-speed serial interfaces

Timing margin

A smaller device should not be selected simply because the existing design appears to have unused logic cells. Every critical FPGA resource must be checked.

XC7VX980T Replacement Considerations

When searching for an XC7VX980T replacement, there are two different situations.

A legacy product may require a device that can physically fit the existing PCB.

A new design may instead accept a newer FPGA family with a different package.

For a board-level replacement, package and pin compatibility become critical.

For a functional replacement, engineers should compare logic capacity, DSP, memory, transceivers, I/O, speed grade, power, and development-tool support.

A newer FPGA may provide substantially better performance but still require a complete PCB redesign.

Which One Is Better for Large FPGA Designs?

The answer depends on the resource that limits the design.

If the design is primarily limited by logic or DSP resources, XC7VX980T provides a clear advantage.

If the design already fits comfortably inside XC7VX690T, moving to the larger device may not provide a meaningful benefit.

For memory-heavy designs, the relatively small difference in BRAM between the two devices should be considered carefully.

This is why FPGA selection should be based on the complete utilization profile rather than one headline specification.

XC7VX690T-2FFG1926I vs XC7VX980T-2FFG1926I

The XC7VX690T-2FFG1926I provides a large Virtex-7 FPGA platform with approximately 693K logic cells and more than 10,000 DSP slices.

The XC7VX980T-2FFG1926I increases the logic capacity to approximately 979K cells and DSP resources to approximately 13,838 slices.

For large designs that are reaching the limits of XC7VX690T, XC7VX980T is a logical upgrade candidate.

For designs where BRAM is the primary limitation, however, the relatively small increase in block RAM means the migration should be evaluated more carefully.