12K LUTs, 197 I/O — ECP5 for glue-logic and bridging
The LFE5U-12F-8BG381I is a Lattice ECP5 FPGA with 12000 logic cells and 3000 LABs/CLBs, packing 589824 bits of embedded RAM for small-frame buffering or state machines. 197 user I/O on a 381-FBGA package gives enough pins to bridge a parallel bus or aggregate sensor interfaces without needing a larger die.
Industrial temperature and supply rails
Core supply is 1.045 V to 1.155 V — a tight window that demands a regulated rail, not a direct battery feed. The 381-CABGA (17x17 mm) footprint is a standard BGA array; the 0.8 mm ball pitch routes cleanly on a 4-layer board with via-in-pad if the thermal vias are planned.
Peer fit — speed grade and temperature grade differences
The -8 speed grade on this variant is the fastest in the LFE5U-12 family — the -6 grade peers (LFE5U-12F-6BG256I, LFE5U-12F-6BG381I) share the same 12000 LUT count, 197 I/O, and 589824-bit RAM, but the -8 delivers tighter timing margins for the same logic. The commercial-temperature peer LFE5U-12F-6BG256C (0°C to 85°C) is a cost-reduction option if the end system never sees the industrial range, but the -8BG381I's wider temperature envelope avoids a qualification respin later.