The SIT1021Q is a physical layer transceiver of Local Interconnect Network (LIN). It 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 typically used for low speed in-vehicle networks using baud rates from 1 kbps to 20 kbps. The LIN protocol data stream at the transmit data input (TXD) is converted by the SIT1021Q into a bus signal with optimized wave shaping to minimize ElectroMagnetic Emission (EME). The SIT1021Q converts the data stream on LIN bus to logic level signals that are sent to the microprocessor via the pin RXD. The LIN bus is pulled high by the internal slave resistor and a series diode. Master applications require an external pull-up resistor in series with a diode to connect pin VBAT and pin LIN.