5CGXC4 vs XC6SLX45T
A comparison of the Altera Cyclone V 5CGXC4 and the AMD Spartan-6 XC6SLX45T using the data from both vendors' selection guides.
Side-by-side specifications
| 5CGXC4 | XC6SLX45T | |
|---|---|---|
| Vendor / family | Altera Cyclone V | AMD Spartan-6 |
| LUTs as published | 18,868 ALMs | 27,288 LUT6 |
| LUT type | adaptive logic module: fracturable 8-input LUT (one 6-input or two independent 4-input functions) | 6-input look-up table, fracturable into two LUT5 with shared inputs |
| LUT4 equivalent (approx.) | ≈37,736 | ≈43,661 |
| CoreScore (SERV cores) | — | — |
| Vendor logic figure | 50,000 LE | 43,661 LC |
| DSP | 70 variable-precision DSP blocks | 58 DSP48A1 slices |
| Block RAM | 2.4 Mb | 2 Mb |
| Large RAM | — | — |
| Max. user I/O | 336 | 296 |
| Transceivers | 6 × XCVR 3.125 Gb/s | 4 × GTP 3.2 Gb/s |
| Hard PCI Express | Gen1 | Gen1 x1 |
| Hard processor | None | None |
| Process | 28 nm | 45 nm |
| Configuration memory | SRAM | SRAM |
| Packages | 5 | 3 |
| Design tool | Altera Quartus Prime | 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 XC6SLX45T has about 16% more logic capacity (43.7K vs 37.7K LUT4 equivalents).
They use different logic architectures: the 5CGXC4 is built from ALMs and the XC6SLX45T from LUT6, so the raw LUT counts (18.9K vs 27.3K) are not directly comparable.
For arithmetic, the 5CGXC4 has 70 variable-precision DSP blocks against 58 DSP48A1 slices on the XC6SLX45T.
The 5CGXC4 has more on-chip memory (2.4 Mb vs 2 Mb).
Both have transceivers: 6 at up to 3.125 Gb/s on the 5CGXC4 and 4 at up to 3.2 Gb/s on the XC6SLX45T.
The 5CGXC4 is designed with Altera Quartus Prime; open source: Yosys + nextpnr-mistral (experimental) with Mistral and the XC6SLX45T with AMD ISE Design Suite.
Full specifications
See the complete spec sheets with packages and grades: 5CGXC4 (Cyclone V) and XC6SLX45T (Spartan-6).