Type Port expander Applications Ideal for systems requiring additional I/O control, such as managing sensors, switches, and LEDs On-board modules TCAL9538 - 8-bit I2C-bus I/O expander from Texas Instruments Key Features 8 configurable I/O pins (input or output), polarity inversion for input pins, programmable output drive strength and pull-up/pull-down resistors, agile I/O features including latchable inputs and maskable interrupts, interrupt and reset feature, and more Interface I2C Feature Click Snap,ClickID Compatibility mikroBUS™ Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V