The SIT1028Q is a Local Interconnect Network (LIN) physical layer transceiver with internal integrated high voltage LDO. It can provide stable 5V/3.3V power supply for external ECU (Electronic Control Unit) microcontroller or related peripherals. The LIN transceiver is compliant with LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A, ISO 17987-4:2016(12V) and SAE J2602 standards. It is mainly suitable for in-vehicle networks with a transmission rate of 1kbps to 20kbps. The LIN bus output pin of the SIT1028Q has an internal pull-up resistor with a bus output waveform shaping function to reduce electromagnetic radiation (EME). TXD pin is used as the input end to send the low-voltage signal of the microcontroller to LIN bus. Meanwhile, LIN pin receives the data stream on the bus, and the data is transmitted back to the microcontroller or to other microcontrollers by RXD output pin of the receiver.