LIFCL-40 vs XC6SLX45
A comparison of the Lattice CrossLink-NX LIFCL-40 and the AMD Spartan-6 XC6SLX45 using the data from both vendors' selection guides.
Side-by-side specifications
| LIFCL-40 | XC6SLX45 | |
|---|---|---|
| Vendor / family | Lattice CrossLink-NX | AMD Spartan-6 |
| LUTs as published | 32,500 LUT4 | 27,288 LUT6 |
| LUT type | 4-input look-up table | 6-input look-up table, fracturable into two LUT5 with shared inputs |
| LUT4 equivalent (approx.) | ≈32,500 | ≈43,661 |
| CoreScore (SERV cores) | — | — |
| Vendor logic figure | 39,000 LC | 43,661 LC |
| DSP | 56 18×18 multipliers | 58 DSP48A1 slices |
| Block RAM | 1.5 Mb | 2 Mb |
| Large RAM | 1 Mb | — |
| Max. user I/O | 191 | 358 |
| Transceivers | None | None |
| Hard PCI Express | Gen2 | None |
| Hard processor | None | None |
| Process | 28 nm | 45 nm |
| Configuration memory | SRAM | SRAM |
| Packages | 5 | 4 |
| Design tool | Lattice Radiant | AMD ISE Design Suite |
Highlighted values are higher. LUT counts are shown as published; the LUT4 equivalent is an approximation to compare different LUT types, see how FPGA vendors count logic. Add up to two more devices to this comparison.
Key differences
The XC6SLX45 has about 34% more logic capacity (43.7K vs 32.5K LUT4 equivalents).
They use different logic architectures: the LIFCL-40 is built from LUT4 and the XC6SLX45 from LUT6, so the raw LUT counts (32.5K vs 27.3K) are not directly comparable.
For arithmetic, the XC6SLX45 has 58 DSP48A1 slices against 56 18×18 multipliers on the LIFCL-40.
The LIFCL-40 has more on-chip memory (2.5 Mb vs 2 Mb).
The LIFCL-40 is designed with Lattice Radiant; open source: Yosys + nextpnr-nexus with Project Oxide and the XC6SLX45 with AMD ISE Design Suite.
Full specifications
See the complete spec sheets with packages and grades: LIFCL-40 (CrossLink-NX) and XC6SLX45 (Spartan-6).