6 layers15.2 × 50.8 mm

Boards in 1 GitHub repository, designed in KiCad, that use the PCAL6534EVJ by NXP Semiconductors (-40℃~+85℃ 1MHz 34 800mV~3.6V I2C、SMBus Interrupt Output VFBGA-42(2.6x3) I/O Expanders ROHS). See how each wires it, with its parts, size, README and files; the PCAL6534EVJ’s symbol, footprint and pinout are on its own page.
