The PCF8574TS is an 8-bit I/O expander with I2C-bus protocol manufactured by NXP Semiconductors. It offers an extended operating temperature range of -40°C to +125°C and is housed in an 8-pin SOIC package. It provides an interface for up to 8 input/output ports that can be used to control electronic devices over an I2C. The PCF8574TS is an ideal solution for applications that require a low-cost, low-power and flexible I/O expander. It provides general-purpose I/O expandability for most microcontroller-based systems applications, such as LCDs, Keypads, LEDs, and more.