iCE40LM1K vs iCE40UL640
A comparison of the Lattice iCE40 LP/HX/LM iCE40LM1K and the Lattice iCE40 Ultra iCE40UL640 using the data from both vendors' selection guides.
Side-by-side specifications
| iCE40LM1K | iCE40UL640 | |
|---|---|---|
| Vendor / family | Lattice iCE40 LP/HX/LM | Lattice iCE40 Ultra |
| Logic (LUT4-equivalent) | 1,100 | 640 |
| LUTs as published | 1,100 LUT4 | 640 LUT4 |
| Vendor logic figure | 1,100 LC | — LC |
| DSP | — 16×16 MAC blocks | — 16×16 MAC blocks |
| Block RAM | 0.1 Mb | 0.1 Mb |
| Large RAM | — | — |
| Max. user I/O | 39 | 26 |
| Transceivers | None | None |
| Hard PCI Express | None | None |
| Hard processor | None | None |
| Process | 40 nm | 40 nm |
| Configuration memory | NVCM or SRAM | NVCM |
| Packages | 3 | 2 |
| Design tool | Lattice iCEcube2 | Lattice iCEcube2 |
Highlighted values are higher. Logic is compared in LUT4 equivalents; see how FPGA vendors count logic.
Key differences
The iCE40LM1K has about 72% more logic capacity (1.1K vs 640 LUT4 equivalents).
The iCE40LM1K has more on-chip memory (0.1 Mb vs 0.1 Mb).
Configuration memory: nvcm or sram on the iCE40LM1K, nvcm on the iCE40UL640.
The iCE40LM1K is designed with Lattice iCEcube2 and the iCE40UL640 with Lattice iCEcube2.
Full specifications
See the complete spec sheets with packages and grades: iCE40LM1K (iCE40 LP/HX/LM) and iCE40UL640 (iCE40 Ultra).