XC6SLX25 vs XCSU35P
A comparison of the AMD Spartan-6 XC6SLX25 and the AMD Spartan UltraScale+ XCSU35P using the data from both vendors' selection guides.
Side-by-side specifications
| XC6SLX25 | XCSU35P | |
|---|---|---|
| Vendor / family | AMD Spartan-6 | AMD Spartan UltraScale+ |
| LUTs as published | 15,032 LUT6 | 16,000 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.) | ≈24,051 | ≈25,600 |
| CoreScore (SERV cores) | — | — |
| Vendor logic figure | 24,051 LC | 36,000 SLC |
| DSP | 38 DSP48A1 slices | 48 DSP slices |
| Block RAM | 0.9 Mb | 1.7 Mb |
| Large RAM | — | — |
| Max. user I/O | 266 | 304 |
| Transceivers | None | None |
| Hard PCI Express | None | None |
| Hard processor | None | None |
| Process | 45 nm | 16 nm |
| Configuration memory | SRAM | SRAM |
| Packages | 3 | 3 |
| 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: 24.1K and 25.6K LUT4 equivalents.
For arithmetic, the XCSU35P has 48 DSP slices against 38 DSP48A1 slices on the XC6SLX25.
The XCSU35P has more on-chip memory (1.7 Mb vs 0.9 Mb).
The XC6SLX25 is designed with AMD ISE Design Suite and the XCSU35P with AMD Vivado.
Full specifications
See the complete spec sheets with packages and grades: XC6SLX25 (Spartan-6) and XCSU35P (Spartan UltraScale+).