Summary of CAN Transceiver for Automotive
The article presents the NXP TJA1042 CAN transceiver designed for high-speed automotive CAN applications up to 1 Mbps. This device bridges the CAN protocol controller and physical bus, providing improved ESD, EMI, and EME performance, plus support for 24V systems. The example integration involves a host microcontroller powered by 3V or 5V, with the transceiver powered through a dedicated 5V regulator to ensure proper CAN transmission.
Parts used in the TJA1042 CAN Transceiver Integration:
- TJA1042 CAN transceiver
- Microcontroller (3V or 5V supply)
- 5V voltage regulator
- Physical two-wire CAN bus connection
The TJA1042 of NXP Semiconductor is a CAN transceiver with high-speed capabilities that provides a physical link between physical transmission medium and the protocol controller. The transceiver is designed for high-speed (up to 1Mbps) CAN applications in the automotive industry, providing the differential transmit and receive capability to a microcontroller with a CAN protocol controller.
The NXP high-speed CAN transceivers provide the interface between a Controller Area Network (CAN) protocol controller and the physical two-wire CAN bus. This ensures full interoperability with other ISO11898 compliant transceiver products. These transceivers offer a significantly improved ESD robustness, a further reduction in Electromagnetic Emission (EME), an improved Electromagnetic Immunity (EMI), a higher voltage robustness in order to fully support 24V applications, and a predictable undervoltage behavior at all supply conditions.
The circuit shows how to integrate the TJA1042T within a typical application. The application example assumes either a 5V or a 3V supplied host microcontroller. There is a dedicated 5V regulator supplying the TJA1042T transceiver on its VCC supply pin (necessary for proper CAN transmit capability).
For more detail: CAN Transceiver for Automotive
