NXP Semiconductor’s TJA1028 is a Local Interconnect Network (LIN) bus transceiver with an integrated low-drop voltage regulator. The voltage regulator is designed to power an automotive Electronic Control Unit (ECU), integrating the major peripheral functions around the microcontroller of a typical LIN-networked ECU into a single chip. The combination of voltage regulator and bus transceiver makes it possible to develop compact yet powerful slave nodes in LIN bus systems.

The TJA1028 LIN Bus Controller is able to handle low-speed data communication in vehicles and is suitable for various LIN slave applications such as rain-light sensors, mirror modules, window lifters and switch panels. TJA1028 LIN Bus Controller is the interface between a LIN master/slave protocol controller and the physical bus in a Local Interconnect Network (LIN).

TJA1028 LIN Bus Controller combines the functionality of a LIN bus transceiver and a voltage regulator in a single chip and offers wake-up by bus activity. The voltage regulator is designed to power the Electronic Control Unit’s (ECU) microcontroller and its peripherals. TJA1028 LIN Bus Controller offers strong Electrostatic Discharge (ESD) and Electromagnetic Compatibility (EMC) performance with bus output designed to withstand high voltages, enabling robust automotive designs.

The TJA1028 LIN Bus Controller system basis chip (SBC) family can deliver up to 70 mA and is available in 3.3V and 5.0V variants. In order to minimize current consumption, the TJA1028 LIN Bus Controller supports a sleep mode in which the LIN transceiver and the voltage regulator are switched off while still having wake-up capability via the LIN bus. The TJA1028 LIN Bus Controller also offers a low-power standby mode, in which the LIN transceiver is switched off while the voltage regulator is still supplying the microcontroller.