XC6VLX240T-1FFG1156C vs XC6VLX365T-1FFG1156C: Virtex-6 FPGA Comparison

ElecSuppliers Part Number ComparisonAug 18, 2026

The XC6VLX240T-1FFG1156C and XC6VLX365T-1FFG1156C are high-density AMD Xilinx Virtex-6 FPGAs designed for applications requiring programmable logic, embedded memory, DSP processing, and extensive I/O.

Both devices belong to the same Virtex-6 family and use the -1 speed grade, FFG1156 package, and commercial temperature grade.

The main difference is resource capacity. XC6VLX365T provides a substantially larger FPGA fabric than XC6VLX240T, making it a potential option for designs that have outgrown the smaller device.

XC6VLX240T vs XC6VLX365T

XC6VLX365T is the larger device and is intended for more demanding FPGA implementations.

What Is the Main Difference?

The most important distinction is the amount of programmable logic available.

XC6VLX240T can handle complex FPGA designs, but a design can eventually reach a point where additional algorithms, interfaces, processing channels, or hardware accelerators no longer fit comfortably.

XC6VLX365T provides additional capacity for these larger architectures.

This makes the comparison particularly relevant when maintaining an existing Virtex-6 design and deciding whether a larger device is required.

When XC6VLX240T Is the Better Choice

The larger FPGA is not always the better option.

If an existing design fits comfortably inside XC6VLX240T, moving to XC6VLX365T may provide little practical benefit.

A smaller device can be preferable when the application has predictable resource requirements and the engineering team wants to avoid unnecessary device capacity.

For established products, a device that already meets the requirements with sufficient margin can be a sensible choice.

Why XC6VLX365T May Be Needed

XC6VLX365T becomes more attractive as FPGA functionality grows.

A product revision may add additional processing channels, communication interfaces, digital filters, data buffers, or hardware accelerators.

These changes can increase several resource categories simultaneously.

The larger device gives the designer more room to accommodate such changes.

This is especially useful when the existing XC6VLX240T design is already approaching its implementation limits.

Do Not Compare Only LUT Utilization

FPGA capacity is multidimensional.

A design can have available logic cells but still fail because another resource is exhausted.

Engineers should examine:

Logic resources

Registers

Block RAM

DSP resources

I/O

Clocking

Routing

Timing

For example, a DSP-heavy application may reach its multiplier or DSP limit before its general-purpose logic becomes full.

A memory-intensive design can encounter BRAM limitations instead.

The correct replacement or upgrade should therefore be based on the actual implementation report.

Virtex-6 for Legacy FPGA Systems

Virtex-6 is an older FPGA generation, so replacement planning can be especially important for long-running industrial and embedded products.

Existing Virtex-6 systems may still be deployed in communications, industrial equipment, instrumentation, image processing, and other applications where redesigning the complete hardware platform would be expensive.

In these cases, engineers may be looking for an original-device replacement, a compatible alternative, or a migration path to a newer FPGA family.

Each situation requires a different approach.

FFG1156 Package Compatibility

Both part numbers use the FFG1156 package.

This makes them relevant for designs where the existing PCB is already based around the FFG1156 package.

However, identical package designations do not by themselves prove complete pin compatibility.

Before treating XC6VLX365T as an XC6VLX240T replacement, verify:

Power pins

I/O banks

Clock inputs

Configuration pins

I/O standards

Dedicated interfaces

PCB routing

Thermal requirements

The exact device pinout should always be checked before a production change.

Can XC6VLX365T Replace XC6VLX240T?

XC6VLX365T can be considered a higher-capacity upgrade candidate when an XC6VLX240T design requires more FPGA resources.

The migration still requires the FPGA project to be implemented for the target device.

Timing, routing, power, and I/O configuration should all be reviewed.

A larger FPGA does not automatically make an existing design compatible without modification.

Can XC6VLX240T Replace XC6VLX365T?

The smaller XC6VLX240T can only replace XC6VLX365T when the existing design has enough unused resources.

The first step should be to examine the implementation results of the XC6VLX365T design.

If the design uses more logic, DSP, or memory than XC6VLX240T can provide, the migration will require architectural changes.

If the existing design has substantial unused capacity, a smaller device may be possible.

XC6VLX365T Replacement Considerations

When searching for an XC6VLX365T replacement, it is important to define the replacement requirement.

A legacy product may require the same package.

Another project may only need equivalent FPGA resources.

A new product may be able to move to a newer AMD Xilinx FPGA generation entirely.

These three situations should not be treated as the same replacement problem.

For a PCB-level replacement, pinout and electrical compatibility are critical.

For a functional replacement, FPGA capacity, DSP, memory, I/O, timing, power, and tool support become more important.

When a Newer FPGA Makes More Sense

For a completely new design, moving directly to a newer FPGA family may be more practical than building around an older Virtex-6 device.

Newer generations can offer improvements in architecture, power efficiency, processing capability, memory resources, and high-speed interfaces.

However, this approach usually requires changes to the PCB and FPGA development environment.

For an existing product where the hardware cannot easily be redesigned, maintaining the Virtex-6 platform may still be the more practical approach.

XC6VLX240T or XC6VLX365T?

The XC6VLX240T-1FFG1156C is suitable when the design fits comfortably within its available FPGA resources.

The XC6VLX365T-1FFG1156C is the better choice when additional logic, DSP, memory, or future expansion capacity is required.

Because both devices belong to Virtex-6 and use the FFG1156 package class, they are natural candidates for comparison when evaluating an existing legacy design.

For replacement projects, however, package similarity is only the starting point. The exact pinout, power requirements, I/O configuration, timing, resource utilization, and PCB implementation should all be verified before selecting the target device.