TJA1027TK/20,118

The TJA1027TK/20,118 is a full-duplex transceiver specifically designed for Vehicle Area Network (VAN) applications. It provides an interface between the physical layer and the data link layer of the Controller Area Network (CAN) protocol. The device is characterized by its supporting low-power capabilities for applications that run on a single battery, as well as its wide operating temperature range of -40°C to 125°C.

Application Field

The TJA1027TK/20,118 is commonly used in automotive applications related to the in-car networks such as powertrain and body network architectures. It is used to connect the ECU’s, sensors, actuators and controllers via a single, fault-tolerant network. It is also suitable for industrial applications due to its relatively wide operating temperature range.

Working Principle

The TJA1027TK/20,118 is a full-duplex transceiver which uses differential input and output for improved signal integrity and robustness. The presented serial bus requires 3 logic lines: RxD (receiver), TxD (transmitter) and TRx (transceiver control line). It also operates at two different speeds (20Kb/s and 118Kb/s) and supports different frame formats (Rx, Standard, Extended).

The TJA1027TK/20,118 performs following operations:

• Sending data – transmitted data is shifted out the TxD pin after it is received via the RxD pin
• Receiving data – received data is shifted out the RxD pin after it is transmitted via the TxD pin
• Error detection – both transmitter and receiver have error detection mechanisms
• Transceiver control – theTRx pin is used to control the transceiver mode (receive, transmit or transmit/receive)

The transceiver provides several features such as:

• Data Period – the time allowed for data transmission on the bus
• Data Filter – the ability to filter out errors from incoming data frames
• CCL (CAN Connection Layer) – a dedicated frame format for multi-node networks
• Error Frame Detection and Reporting – the ability to detect and report errors on the bus