XC6SLX75 vs XC7S75
A comparison of the AMD Spartan-6 XC6SLX75 and the AMD Spartan-7 XC7S75 using the data from both vendors' selection guides.
Side-by-side specifications
| XC6SLX75 | XC7S75 | |
|---|---|---|
| Vendor / family | AMD Spartan-6 | AMD Spartan-7 |
| LUTs as published | 46,648 LUT6 | 48,000 LUT6 |
| LUT type | 6-input look-up table, fracturable into two LUT5 with shared inputs | 6-input look-up table, fracturable into two LUT5 with shared inputs |
| LUT4 equivalent (approx.) | ≈74,637 | ≈76,800 |
| CoreScore (SERV cores) | — | — |
| Vendor logic figure | 74,637 LC | 76,800 LC |
| DSP | 132 DSP48A1 slices | 140 DSP slices |
| Block RAM | 3 Mb | 3.2 Mb |
| Large RAM | — | — |
| Max. user I/O | 408 | 400 |
| Transceivers | None | None |
| Hard PCI Express | None | None |
| Hard processor | None | None |
| Process | 45 nm | 28 nm |
| Configuration memory | SRAM | SRAM |
| Packages | 3 | 2 |
| Design tool | AMD ISE Design Suite | AMD Vivado |
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
Both devices offer similar logic capacity: 74.6K and 76.8K LUT4 equivalents.
For arithmetic, the XC7S75 has 140 DSP slices against 132 DSP48A1 slices on the XC6SLX75.
The XC6SLX75 is designed with AMD ISE Design Suite and the XC7S75 with AMD Vivado; open source: openXC7 (experimental) with Project X-Ray.
Full specifications
See the complete spec sheets with packages and grades: XC6SLX75 (Spartan-6) and XC7S75 (Spartan-7).