TJA1055T/1J

The TJA1055T/1J is an Automotive Bus Transceiver and Protocol Controller, which is specifically developed to support intelligent vehicle components. This transceiver offers the best possible speed, throughput, and reliability in the most demanding applications. It enables robust data communications and provides an optimized, error-free interface between bus users and the bus itself. In this article, we will discuss the TJA1055T/1J’s application field, its working principle, and similarities with other transceivers.

Application Field

TJA1055T/1J transceivers are designed to support common in-vehicle communication protocols such as LIN, SAE J1850, and ISO11898-2. In addition, they provide an optimized, error-free interface between bus users and the bus. This transceiver is also fully compatible with standard electrostatic discharge (ESD) and electromagnetic interference (EMI) requirements and is specifically designed for applications in vehicles, such as electric and hybrid-electric vehicles, as well as for various applications in the automotive industry.

TJA1055T/1J transceivers are ideal for applications that require reliable data transmission, robust hot-plugging capability, improved EMC performance, and low power consumption. They are designed for applications such as powertrain and body electronics, engine management systems, airbags, antilock braking systems, chassis control systems, tire pressure monitoring systems, electric drive trains, and electric vehicle charging systems.

Working Principle

The TJA1055T/1J transceiver is a combined transceiver and protocol controller. It includes a voltage independent receiver and transmitter which allow the communication interface to be connected to the bus in either direction, allowing multiple devices to communicate bidirectionally. The on-chip protocol controller handles the bus protocol, allowing data to be sent and received in a stand-alone or distributed manner, as determined by the protocol being used.

The protocol controller has a flexible memory architecture with up to three levels of memory. The first level stores the received and transmitted data as it is received or transmitted by the bus. The second level is the frame buffer, which stores the complete frames as they are received from or transmitted to the bus. The third level is the message buffer, which stores the messages which were received or transmitted. The protocol controller also includes a comparator for error detection and correction, and an encoder for serializing the data for transmission over the bus.

Similarity with Other Transceivers

TJA1055T/1J transceivers are similar to other bus transceivers such as the PCA9306, SN65HVDA, and MCP2551. However, they have some distinct features that set them apart from other transceivers. Most notably, they are optimized to support high speed CAN communications with EMI and ESD protection. They also include an integrated protocol controller to allow the user to configure the protocol over the bus. Additionally, they have the ability to support 3-wire and 4-wire interfaces, allowing for increased functionality and robustness over single-wire CAN protocols.

The TJA1055T/1J is a powerful transceiver that provides improved reliability and better performance in critical automotive applications. It incorporates key features designed to address the needs of the most demanding applications in the automotive industry. With its integrated protocol controller, flexible memory architecture, error detection/correction features, and support for multiple communication protocols, the TJA1055T/1J is an ideal solution for robust and reliable in-vehicle communications.