TPIC1021D (TEXAS INSTRUMENTS)

The TPIC1021D is a Local Interconnect Network Physical Interface integrates the serial transceiver with wake up and protection features. The LIN bus is a single wire, bi-directional bus typically used for low-speed in-vehicle networks using baud rates between 2.4 and 20kbps. The LIN bus has two logical values: the dominant state (voltage near ground) represents a logic 0 and the recessive state (voltage near battery) and represents logic 1. In the recessive state the LIN bus is pulled high by the TPIC1021's internal pull-up resistor (30kR) and series diode, so no external pullup components are required for slave applications. Master applications require an external pullup resistor (1R) plus a series diode. The LIN protocol output data stream on the TXD pin is converted by the TPIC1021 into the LIN bus signal through a current limited, wave-shaping low-side driver with control as outlined by the LIN Physical Layer Specification Revision 2.0.