TJA1050T/VM,518

Introduction to TJA1050T/VM 518

The TJA1050T/VM 518 is an interface technology designed to provide low-cost, low-power, high-performance communication between control units and the physical control of other components in connected networks like CAN and LIN. This technology is a linear transceiver, which is a combination of a physical layer transceiver and a data-link layer transceiver. It is designed to ensure fast, error-free data transfer between two devices.

Application Fields of TJA1050T/VM 518

TJA1050T/VM 518 can be used in a variety of applications, such as vehicle security, automotive diagnostics, safety systems, industrial automation, and many more. It’s main application field is automotive, as it is widely used in modern cars. It is also used in in-vehicle infotainment systems, powertrains, HVAC systems, body electronics, and other vehicle networks.

The TJA1050T/VM 518 is suitable for high-speed applications due to its high-speed operation and the robustness of its data link layer protocol. Its operation is especially suitable for applications subject to significant EMI, such as electric vehicles, or applications with significant cable length requirements, such as measurement systems or factory automation.

Working Principle of TJA1050T/VM 518

The TJA1050T/VM 518 transceiver utilizes the CAN protocol to transmit and receive data. Its operation is based on the double-sampling technique, which allows it to successfully transfer data even in noisy environments or over long cable distances. The transceiver includes a CAN controller, which performs the functions of data link layer protocol, frame buffering and arbitration. It also includes a physical layer, which is responsible for the electrical interfacing with the bus and handling of the bit-level communication.

The CAN controller, which is at the heart of the transceiver, performs the following functions:

• Sending and receiving data
• Arbitration and frame transmission
• Error and frame checking
• Frame delay compensation
• Interrupt handling
• Bus monitoring

The physical layer is responsible for the electrical interfacing with the bus and handles the bit-level communication. The physical layer integrates a physical layer transceiver, which is a low-power, low-cost, short-range transceiver. It is compatible with all popular CAN bit rates and can support 12 V, 24 V and 42 V networks. The physical layer transceiver includes the following components:

• A ground contact
• A differential driver and receiver
• A termination network
• A medium access control (MAC) unit

The ground contact is responsible for the stability and robustness of the network. The differential driver and receiver convert the CAN logic levels into the corresponding CAN bus voltage level. The termination network provides impedance matching to minimize reflections and ground loops. The MAC unit is responsible for the coordination of the data transmission, arbitration and error handling.

Conclusion

The TJA1050T/VM 518 transceiver provides a high-performance, low-cost and low-power solution for automotive and industrial communication applications. It is based on the CAN protocol and is suitable for a varied range of applications. Its main components include the CAN controller and the physical layer transceiver that handle the data link and bit-level communication respectively.