TJA1044T/1Z

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Interface - Drivers, Receivers, Transceivers

The TJA1044T/1Z interface is a communication device that facilitates the transmission of data between two separate devices while providing electrical and optical isolation. It is a key component in Automotive Ethernet applications, providing reliable connection and system safety and protection. Its primary application involves connecting a low-speed peripherals to higher speed Ethernet networks. It is a two-wire and two-wire transceiver for vehicles with a flexible bit-rate sending—CAN, FlexRay or LIN.

The TJA1044T/1Z can be used to achieve long distance and/or single-wire CAN and CAN-FD communication links in a vehicle or passenger car. It features a low power consumption for a lengthy existence, with a high level of safety, thanks to its low working voltage, featuring an in-built electrostatic shielding. This can help protect against external electromagnetic interference.

Working Principle

The TJA1044T/1Z operates as a half-duplex transceiver, and allows information to be sent and received over a single set of wires. It works by transmitting data at high speed through an output driver and input receiver, both of which have built-in complementary filters to reduce electromagnetic interference (EMI) in the system. The driver transmits the data by amplifying it to a level which is suitable for the receiver, while the receiver amplifies the data before it is sent to the systems network.

The TJA1044T/1Z operates by sensing input signals from the transmission bus and using them as data sources for a digital logic unit. It then transmits the data, in the form of a square wave, to a transmitter section which amplifies the signal for transmission over the bus. The receiver then detects the signal, rectifies it and sends it to the digital logic unit. The digital logic unit then acts on the data and sends the response back through the transmission bus.

Benefits

The TJA1044T/1Z is an important component in automotive Ethernet applications. It offers several benefits, such as:

• Its bi-directional half-duplex transceiver ensures reliable connection between two devices without sacrificing performance.
• It offers low power consumption, allowing for increased system safety and efficiency.
• It features built-in electrostatic shielding, which helps protect against external electromagnetic interference.
• It provides flexible bit-rate transmission for CAN, FlexRay and LIN.
• It is backward compatible with CAN v2.x networks.

Conclusion

The TJA1044T/1Z is a communication device that facilitates the transmission of data between two separate devices while providing electrical and optical isolation. Its primary application involves connecting a low-speed peripherals to higher speed Ethernet networks, and it is a key component in Automotive Ethernet applications. It works by transmitting and receiving data through an output driver, input receiver, and digital logic unit, and it also offers several benefits, such as low power consumption, built-in electrostatic shielding, flexible bit-rate transmission and backward compatibility with CAN v2.x networks.

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