LFE5U-85
LatticeECP5The LFE5U-85 is an ECP5 FPGA from Lattice, built on a 40 nm process. It provides 84,000 LUT4 look-up tables, 3.7 Mb of block RAM and 156 18×18 multipliers. It offers up to 365 user I/O pins. It is available in 4 packages, from the csfBGA285 (10 × 10 mm) to the caBGA756 (27 × 27 mm). Designs are built with Lattice Diamond.
Specifications
| Vendor | Lattice |
|---|---|
| Family | ECP5 |
| Series | ECP5 |
| Process | 40 nm |
| Configuration memory | SRAM |
| LUT4-equivalent capacity | 84,000 |
| Look-up tables (LUT4) | 84,000 |
| Distributed RAM | 669 Kb |
| Block RAM | 3.7 Mb (208 × 18 Kb) |
| DSP (18×18 multiplier) | 156 |
| Max. user I/O | 365 |
|---|---|
| Transceivers | None |
| PCI Express | None |
| Analog / monitor | None |
| Design tool | Lattice Diamond |
Packages
| Package | Size (mm) | Pitch (mm) | User I/O | Transceivers |
|---|---|---|---|---|
| csfBGA285 | 10 × 10 | 0.5 | 118 | — |
| caBGA381 | 17 × 17 | 0.8 | 205 | — |
| caBGA554 | 23 × 23 | 0.8 | 259 | — |
| caBGA756 | 27 × 27 | 0.8 | 365 | — |
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 LFE5U-85
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 |
|---|---|---|---|---|---|---|---|
| XC7S75AMD Spartan-7 | 76.8K 48K LUT6 | 76.8K LC | 140 | 3.2 Mb | 400 | — | — |
| XC7S100AMD Spartan-7 | 102K 64K LUT6 | 102K LC | 160 | 4.2 Mb | 400 | — | — |
| EP4CE75Altera Cyclone IV | 75K 75K LUT4 | 75K LE | 200 | 2.7 Mb | 426 | — | — |
| Ti95Efinix Titanium | ≈93.2K 93.2K LEs | 93.2K LE | 210 | 4.5 Mb | 241 | — | — |
| T85Efinix Trion | ≈84.1K 84.1K LEs | 84.1K LE | 240 | 4 Mb | 278 | — | — |
| 5CEA5Altera Cyclone V | 58.2K 29.1K ALMs | 77K LE | 150 | 4.4 Mb | 240 | — | — |
Compare side by side: LFE5U-85 vs XC7S75, LFE5U-85 vs XC7S100, LFE5U-85 vs EP4CE75, LFE5U-85 vs Ti95.
LFE5U-85 quick facts
How many LUTs does the LFE5U-85 have?
The LFE5U-85 has 84,000 LUT4 look-up tables, about 84,000 LUT4 equivalents.
How many DSP blocks does the LFE5U-85 have?
The LFE5U-85 has 156 18×18 multipliers and 3.7 Mb of block RAM.
Does the LFE5U-85 have transceivers?
No, the LFE5U-85 has no multi-gigabit transceivers. Its user I/O supports up to 365 pins.
What are the alternatives to the LFE5U-85?
Devices of similar size in other families include XC7S75 (AMD Spartan-7), XC7S100 (AMD Spartan-7), EP4CE75 (Altera Cyclone IV).
Which software is used to design with the LFE5U-85?
Designs for the LFE5U-85 are built with Lattice Diamond.
Other ECP5 devices
| Device | LUT4-eq. | Vendor logic | DSP | Block RAM | Max I/O | Transceivers | PCIe |
|---|---|---|---|---|---|---|---|
| LFE5U-12 | 12K 12K LUT4 | — | 28 | 0.6 Mb | 197 | — | — |
| LFE5UM-25 | 24K 24K LUT4 | — | 28 | 1 Mb | 197 | 2 SERDES 3.2 Gb/s | — |
| LFE5UM5G-25 | 24K 24K LUT4 | — | 28 | 1 Mb | 197 | 2 SERDES 5 Gb/s | — |
| LFE5U-25 | 24K 24K LUT4 | — | 28 | 1 Mb | 197 | — | — |
| LFE5UM-45 | 44K 44K LUT4 | — | 72 | 1.9 Mb | 245 | 4 SERDES 3.2 Gb/s | — |
| LFE5UM5G-45 | 44K 44K LUT4 | — | 72 | 1.9 Mb | 245 | 4 SERDES 5 Gb/s | — |
| LFE5U-45 | 44K 44K LUT4 | — | 72 | 1.9 Mb | 245 | — | — |
| LFE5UM-85 | 84K 84K LUT4 | — | 156 | 3.7 Mb | 365 | 4 SERDES 3.2 Gb/s | — |
| LFE5UM5G-85 | 84K 84K LUT4 | — | 156 | 3.7 Mb | 365 | 4 SERDES 5 Gb/s | — |
| LFE5U-85 | 84K 84K LUT4 | — | 156 | 3.7 Mb | 365 | — | — |
Source: Lattice ECP5 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.