TJA1042T/3/1J: The Key to High-Speed CAN FD Networking in Modern Vehicles

The TJA1042T/3/1J model is an electronic component designed to facilitate high-speed communication in modern vehicles. This high-speed CAN transceiver provides an interface between a Controller Area Network (CAN) protocol controller and the physical two-wire CAN bus. The TJA1042T/3/1J is part of the third generation of high-speed CAN transceivers from NXP Semiconductors, offering significant improvements over previous generations.

Key Features of the TJA1042T/3/1J

1. High-Speed CAN Interface: The TJA1042T/3/1J supports high-speed CAN applications, providing differential transmit and receive capabilities to a CAN protocol controller. This ensures reliable communication in high-speed networks, with data rates up to 5 Mbit/s in the CAN FD fast phase.

2. Standby Mode with Wake-Up Capability: The transceiver features a very low-current standby mode, which allows it to conserve power while maintaining the ability to wake up via the CAN bus. This mode is ideal for applications where power consumption is critical.

3. Electromagnetic Compatibility (EMC) and ElectroStatic Discharge (ESD) Performance: The TJA1042T/3/1J offers improved EMC and ESD performance, making it suitable for applications in environments with high electromagnetic interference.

4. Direct Interfacing with Microcontrollers: The transceiver variants with a VIO pin allow for direct interfacing with microcontrollers with supply voltages from 3.3 V to 5 V. This feature simplifies the integration process and reduces the need for additional components.

5. Compliance with Industry Standards: The TJA1042T/3/1J is fully compliant with ISO 11898-2:2016, SAE J2284-1 to SAE J2284-5, and SAE J1939-14. This compliance ensures that the transceiver meets the necessary standards for reliable communication in modern vehicle networks.

6. Low Electromagnetic Emission (EME) and High Electromagnetic Immunity (EMI): The transceiver is designed to meet proposed EMC standards, such as IEC 62228-3 and SAE J2962-2. This ensures that the transceiver operates efficiently and reliably in environments with high electromagnetic interference.

Technical Details

The TJA1042T/3/1J is designed to support various voltage systems, including 12 V and 24 V systems. It implements the CAN physical layer as defined in ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5. This implementation allows for reliable communication in CAN FD fast phase at data rates up to 5 Mbit/s.

Application Information

The TJA1042T/3/1J requires minimal external circuitry for operation. The typical application diagram for a 5 V microcontroller is shown in Figure 7, and for a 3.3 V microcontroller in Figure 8. These diagrams illustrate the necessary connections and components for integrating the transceiver into a system.

Conclusion

The TJA1042T/3/1J is a versatile and reliable high-speed CAN transceiver designed for modern vehicle networks. Its advanced features, including standby mode with wake-up capability, improved EMC and ESD performance, and direct interfacing with microcontrollers, make it an excellent choice for applications requiring high-speed communication and power efficiency. The TJA1042T/3/1J is fully compliant with industry standards and ensures reliable communication in environments with high electromagnetic interference.

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