The PCA9535EDTR2G is a 16-bit input/output (I/O) expander manufactured by ON Semiconductor. It is an I2C device, with an I2C interface allowing the control of up to 16 independent I/O. The I/O can be configured to be either inputs, outputs, or as an open drain output. It features an integrated power-on reset circuit, an active-high enable pin, an active-high interrupt output pin, an active-high over-current protection pin, and an active-low output disable pin, allowing the user to tailor its functionality to their needs. Additionally, the PCA9535EDTR2G has an operating supply volatage range of 1.8V to 5.5V and an operating temperature range of -40C to +85C. It is available in 8-pin SOIC, VSSOP, or TQFN package options.