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TJA1049T/3J Application Field and Working Principle

TJA1049T/3J is a high-speed, high-efficiency CAN transceiver manufactured by NXP Semiconductors. It is based on the Enhanced Physical layer protocol and is an ideal choice for automotive CAN applications. This transceiver operates at a maximum speed of 10 Mbps when driving low levels and 3 Mbps when driving high levels. It is also compliant with ISO 11898-2 (CAN Part 2) and has low power consumption, making it suitable for high-speed, low-noise battery-operated and other power-sensitive applications. This device is designed for use in the automotive industry, where it may be used in a variety of applications such as airbag control and injection control units, passive safety systems, engine control units, and many others.

Working Principle

The TJA1049T/3J is a transceiver chip that implements the CAN (Controller Area Network) physical layer protocol. CAN is used in automotive applications such as engine control, power steering and airbag control. The TJA1049T/3J is designed to meet the highest requirements of automotive CAN applications. It features a bidirectional differential serial data line and allows communication between two CAN nodes over two twisted-pair cables.

The TJA1049T/3J integrates a physical layer transceiver, an active low-power failure monitor and a bidirectional inter-filter for voltage regulation. The device also has an on-chip 25 MHz ceramic resonator, an oscillator and several input/output pins for clock signals, reset, control and status information. The integrated transceiver supports automatic baud rate detection and digital noise filtering.

The device features a flexible protocol that allows it to be used in a range of applications. It supports both low-frequency and high-speed applications. In addition, the device features an adjustable bus termination resistors and is capable of providing off-bus voltage levels up to 12V.

The TJA1049T/3J is suitable for use in a variety of applications, including in-vehicle communication networks, distributed electronic systems, industrial control systems and medical systems. The device is designed to work in a wide temperature range from -40°C to 125°C and is certified for commercial and automotive applications.

Conclusion

The TJA1049T/3J is a high-speed, low-power CAN transceiver designed for use in a wide range of automotive applications. It supports both low-frequency and high-speed applications, and features an adjustable bus termination resistors, digital noise filtering and off-bus voltage levels up to 12V. The device is also suitable for use in in-vehicle communication networks, distributed electronic systems, industrial control systems and medical systems.

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