iCE40LP640
LatticeiCE40 LP/HX/LMThe iCE40LP640 is a iCE40 LP/HX/LM FPGA from Lattice, built on a 40 nm process. It provides 640 LUT4 look-up tables, 0 Mb of block RAM, with no hard multipliers. It offers up to 10 user I/O pins. It comes in a single package, the WLCSP16 (1.40 × 1.48 mm). Designs are built with Lattice iCEcube2.
Specifications
| Vendor | Lattice |
|---|---|
| Family | iCE40 LP/HX/LM |
| Series | iCE40 |
| Process | 40 nm |
| Configuration memory | NVCM or SRAM |
| LUT4-equivalent capacity | 640 |
| Look-up tables (LUT4) | 640 |
| Logic cells | 640 |
| Block RAM | 0 Mb |
| DSP (16×16 MAC) | None |
| Max. user I/O | 10 |
|---|---|
| Transceivers | None |
| PCI Express | None |
| Analog / monitor | None |
| Design tool | Lattice iCEcube2 |
Packages
| Package | Size (mm) | Pitch (mm) | User I/O | Transceivers |
|---|---|---|---|---|
| WLCSP16 | 1.40 × 1.48 | 0.35 | 10 | — |
Package names are shown as in the selection guide; the full ordering code adds speed grade and temperature (see the data sheet).
Alternatives to the iCE40LP640
Closest matches in other families and vendors by logic, DSP, memory, I/O and transceivers. Check pin compatibility and tools before migrating.
| Device | LUT4-eq. | Vendor logic | DSP | Block RAM | Max I/O | Transceivers | PCIe |
|---|---|---|---|---|---|---|---|
| iCE40UL640Lattice iCE40 Ultra | 640 640 LUT4 | — | — | 0.1 Mb | 26 | — | — |
| iCE40UL1KLattice iCE40 Ultra | 1.2K 1.2K LUT4 | — | — | 0.1 Mb | 26 | — | — |
| GW1AN-1SGowin Arora | 1.2K 1.2K LUT4 | — | — | 0.1 Mb | 44 | — | — |
| GW1NZ-1Gowin LittleBee | 1.2K 1.2K LUT4 | — | — | 0.1 Mb | 48 | — | — |
| LCMXO2-640Lattice MachXO2 | 640 640 LUT4 | — | — | 0 Mb | 79 | — | — |
| LCMXO2-256Lattice MachXO2 | 256 256 LUT4 | — | — | — | 55 | — | — |
Compare side by side: iCE40LP640 vs iCE40UL640, iCE40LP640 vs iCE40UL1K, iCE40LP640 vs GW1AN-1S.
iCE40LP640 quick facts
How many LUTs does the iCE40LP640 have?
The iCE40LP640 has 640 LUT4 look-up tables, about 640 LUT4 equivalents.
How many DSP blocks does the iCE40LP640 have?
The iCE40LP640 has no 16×16 MAC blocks and 0 Mb of block RAM.
Does the iCE40LP640 have transceivers?
No, the iCE40LP640 has no multi-gigabit transceivers. Its user I/O supports up to 10 pins.
What are the alternatives to the iCE40LP640?
Devices of similar size in other families include iCE40UL640 (Lattice iCE40 Ultra), iCE40UL1K (Lattice iCE40 Ultra), GW1AN-1S (Gowin Arora).
Which software is used to design with the iCE40LP640?
Designs for the iCE40LP640 are built with Lattice iCEcube2.
Other iCE40 LP/HX/LM devices
| Device | LUT4-eq. | Vendor logic | DSP | Block RAM | Max I/O | Transceivers | PCIe |
|---|---|---|---|---|---|---|---|
| iCE40LP384 | 384 384 LUT4 | 384 LC | — | — | 39 | — | — |
| iCE40LP640 | 640 640 LUT4 | 640 LC | — | 0 Mb | 10 | — | — |
| iCE40LM1K | 1.1K 1.1K LUT4 | 1.1K LC | — | 0.1 Mb | 39 | — | — |
| iCE40LP1K | 1.3K 1.3K LUT4 | 1.3K LC | — | 0.1 Mb | 97 | — | — |
| iCE40HX1K | 1.3K 1.3K LUT4 | 1.3K LC | — | 0.1 Mb | 98 | — | — |
| iCE40LM2K | 2K 2K LUT4 | 2K LC | — | 0.1 Mb | 39 | — | — |
| iCE40LP4K | 3.5K 3.5K LUT4 | 3.5K LC | — | 0.1 Mb | 180 | — | — |
| iCE40HX4K | 3.5K 3.5K LUT4 | 3.5K LC | — | 0.1 Mb | 109 | — | — |
| iCE40LM4K | 3.5K 3.5K LUT4 | 3.5K LC | — | 0.1 Mb | 39 | — | — |
| iCE40LP8K | 7.7K 7.7K LUT4 | 7.7K LC | — | 0.1 Mb | 180 | — | — |
| iCE40HX8K | 7.7K 7.7K LUT4 | 7.7K LC | — | 0.1 Mb | 208 | — | — |
Source: Lattice iCE40 LP/HX/LM product page, Family Table, retrieved 2026-10-24. Data is extracted automatically from the vendor's selection guide; verify critical values in the device data sheet.