4 layers25.4 × 42.9 mm

Boards in 1 GitHub repository, designed in KiCad, that use the PCAL9538APWJ by NXP Semiconductors (-40℃~+85℃ 1.65V~5.5V 400kHz I2C、SMBus Interrupt Output Reset function、Cascading and address extension、Built-in LED driver TSSOP-16 I/O Expanders ROHS). See how each wires it, with its parts, size, README and files; the PCAL9538APWJ’s symbol, footprint and pinout are on its own page.
