Active MachXO3 with industrial temperature grade
The LCMXO3LF-4300E-5MG121I is an active-production Lattice MachXO3 FPGA offering 4320 logic cells (540 LABs/CLBs) and 100 user I/O in a 121-CSFBGA (6x6 mm) package.
Core supply and memory for glue-logic tasks
The single 1.14 V to 1.26 V core rail simplifies the power tree — a fixed 1.2 V LDO or a switcher set to 1.2 V ±5 % keeps the FPGA within the operating window without a separate 1.8 V or 2.5 V auxiliary supply. 94 Kbit of embedded block RAM (94208 total RAM bits) provides local scratchpad for small FIFOs, status registers, or look-up tables, reducing external SRAM on boards where the logic footprint is under 5K LUTs.
Speed-grade delta and BOM-fit check
The -5 speed grade is one notch below the -6 variant (LCMXO3LF-4300E-6MG121I) — both share the same 100 I/O, 4320 logic cells, and 121-CSFBGA footprint, so the PCB layout is identical; the trade-off is timing margin at the fastest clock frequencies. If the design was validated on a -6 part and the -5 is the available option, confirm that the critical-path propagation delay stays within the setup/hold budget at the target clock rate — the -5 grade typically adds 0.5–1 ns of combinational delay versus -6.