14,000-gate MX FPGA in 84-PLCC — what it fits
The Microchip A42MX09-PLG84 is an MX-series antifuse FPGA delivering 14,000 usable gates with 72 user I/O in an 84-pin PLCC package. This is a one-time-programmable part — the configuration is set at programming and cannot be changed in the field, which locks the firmware before the board ships.
I/O count and package — board-level fit
72 I/O in an 84-PLCC gives a reasonable I/O-to-package ratio for medium-density glue logic or state-machine designs. The PLCC footprint is through-hole compatible for socketed prototyping or direct solder, and the 0.050-inch pitch keeps the fan-out manageable on a two-layer board. The 14,000-gate capacity handles 8- to 16-bit datapath functions, address decoding, and simple bus interfaces without the overhead of a larger FPGA.