2 layers60 × 100 mm

Boards in 1 GitHub repository, designed in KiCad, that use the TCA9554APW by Texas Instruments (-40℃~+85℃ 1.65V~5.5V 1.9uA 10mA 25mA 4.1V 400kHz 400mV 8 8 I2C、SMBus Interrupt Output Push-Pull Reset function、Cascade and address expansion、Built-in LED driver TSSOP-16 I/O Expanders ROHS). See how each wires it, with its parts, size, README and files; the TCA9554APW’s symbol, footprint and pinout are on its own page.
