What this MachXO3 FPGA brings to a board
The Lattice LCMXO3L-4300E-5MG121C is an instant-on, non-volatile FPGA from the MachXO3 family, packing 4320 logic elements and 100 user I/O into a 121-ball CSFBGA that measures 6x6 mm.
Package and board-fit realities
That means a multi-layer PCB with microvias or at least four layers for fan-out; two-layer boards will struggle to route the inner balls. Supplier device package is 121-CSFBGA with a 6x6 mm body. The tray packaging suggests this is a production-tube or tray quantity, not reel — plan for pick-and-place with a tray feeder.
No stock-holding claim — we confirm per RFQ.
How it compares to the LCMXO3LF-4300E-6MG121C
The closest sibling is the LCMXO3LF-4300E-6MG121C — same logic density (4320 LEs), same 100 I/O, same 94 Kbit RAM, same 121-CSFBGA package and footprint. The difference is the speed grade: the -6 variant is rated for a faster maximum operating frequency, while the -5 is the standard-speed version. If your timing closure is already comfortable on the -5, the -6 buys no margin. But if you are pushing the fabric near its timing ceiling, the -6 is the swap to make — same pinout, same PCB, no re-spin.