PCA9509DP,118 is a I2C level translator from NXP. It is designed to be used as an interface for connecting two devices of different logic levels together. It works as a signal buffer and repeater that can convert one logic level into another ensuring the compatibility of different devices and driving longer cables. It is capable of operating with a wide range of voltages, from 1.2 to 5.5 volts, and supports communications in up to 400 kbit/s. This part also features an auto-direction detection allowing it to detect and automatically set the direction of the transmission. It has a small form factor and requires minimal external components, making it suitable for various types of mobile and embedded solutions.