4 layers

Boards in 1 GitHub repository, designed in KiCad, that use the SY89540UMY by Microchip Technology (-40℃~+85℃ 2.375V~2.625V 380ps Single Supply QFN-44-EP(7x7) Signal Switches, Multiplexers, Decoders ROHS). See how each wires it, with its parts, size, README and files; the SY89540UMY’s symbol, footprint and pinout are on its own page.
