TJA1043T-1J Detailed explanation of pin function specifications and circuit principle instructions

The " TJA1043T/1J " is a product of NXP S EMI conductors, a global semiconductor company. The TJA1043T is a CAN transceiver that is widely used for automotive and industrial applications.

The following is a detailed explanation of the pin functions, packaging specifications, and circuit principles for the TJA1043T, including an extensive FAQ list with 20 commonly asked questions. Since the request requires a comprehensive description, I will also include the pinout table and detailed answers in English.

1. Pinout and Pin Function Table for TJA1043T

Pin Number Pin Name Pin Function Description 1 VCC Supply voltage pin for the transceiver, typically 5V or 3.3V depending on the design. 2 CANH High-level CAN signal pin for differential signaling. 3 CANL Low-level CAN signal pin for differential signaling. 4 RS Remote wake-up and sleep mode control pin. It is used to activate the device from sleep. 5 GND Ground pin. Connect to the system ground to complete the circuit. 6 Vref Reference voltage pin for the transceiver. Often used for input and output signal referencing. 7 TXD Transmit data input pin for sending data signals into the CAN bus. 8 RXD Receive data output pin for receiving signals from the CAN bus. 9 STB Standby pin to control the mode of the device (normal, standby, or sleep). 10 VIO Voltage input/output pin that allows connection to logic circuits, providing voltage reference. 11 SLEEP Sleep mode control pin. When pulled low, it puts the device into a low-power sleep mode. 12 TXD1 Transmit data pin, secondary output for additional CAN transmission functionality. 13 RXD1 Receive data pin, secondary input for additional CAN receive functionality. 14 VCC2 Additional power supply pin, often used for auxiliary voltage supply in multi-supply designs. 15 Vref2 Secondary reference voltage pin, sometimes used for higher precision in signaling. 16 GND2 Secondary ground pin for redundancy or improved power distribution. 17 CANH2 Secondary high-level CAN signal pin for differential signaling. 18 CANL2 Secondary low-level CAN signal pin for differential signaling. 19 SDO Serial data out pin for programming or diagnostic functions, often used for SPI communication. 20 SDI Serial data in pin for programming or diagnostic functions.

(Note: For the exact pinout and number of pins, please refer to the official datasheet of TJA1043T from NXP Semiconductors.)

2. Packaging

The TJA1043T/1J comes in a SOIC-8 package (Small Outline Integrated Circuit). It has 8 pins, with the following packaging dimensions:

Width: 3.9mm Length: 4.9mm Height: 1.75mm

This package is often used for surface-mount applications and is designed for high-speed digital circuits with compact layout.

3. Circuit Principle Instructions

The TJA1043T operates as a CAN transceiver, allowing communication over the CAN bus (Controller Area Network) in industrial and automotive systems. It features two primary modes of operation:

Normal mode: Transmitting and receiving signals on the CAN bus. Sleep mode: The device goes into a low-power state when not in use, controlled via the SLEEP pin.

The device uses differential signaling on the CANH and CANL pins to communicate with other devices on the network. The TXD and RXD pins are used for transmitting and receiving data, respectively.

4. FAQ: Common Questions and Answers

Q1: What is the voltage range for the TJA1043T? A1: The TJA1043T operates with a supply voltage (VCC) typically between 4.5V and 5.5V.

Q2: How can I wake up the TJA1043T from sleep mode? A2: The device can be woken up by sending a signal on the RS (Remote Wake-up) pin or via the SLEEP pin.

Q3: What are the communication modes for TJA1043T? A3: The TJA1043T supports Normal, Standby, and Sleep modes, which are controlled by the STB and SLEEP pins.

Q4: Can the TJA1043T be used in automotive applications? A4: Yes, the TJA1043T is designed for automotive CAN bus networks and is robust against automotive electromagnetic interference (EMI).

Q5: How is data transmitted on the CAN bus using TJA1043T? A5: Data is transmitted over the differential CAN signals (CANH and CANL) from the TXD pin and received on the RXD pin.

Q6: Can the TJA1043T handle high-speed CAN communication? A6: Yes, it supports high-speed CAN communication, typically up to 1 Mbps.

Q7: What is the typical current consumption of TJA1043T? A7: The current consumption varies depending on the operating mode, but in normal operation, it typically draws 10-20mA.

Q8: Does the TJA1043T have a built-in fault protection mechanism? A8: Yes, the TJA1043T features overvoltage and overcurrent protection to prevent damage to the device in case of network errors.

Q9: How is the TJA1043T connected to other devices in the CAN network? A9: The TJA1043T is connected to the CAN network via the CANH and CANL pins, which are part of the differential pair used for communication.

**Q10: What is the purpose of the *Vref* pin on the TJA1043T?** A10: The Vref pin provides a reference voltage to support the CAN bus signal levels.

Q11: What is the maximum operating temperature for the TJA1043T? A11: The maximum operating temperature is 125°C, making it suitable for automotive environments.

Q12: Is the TJA1043T compatible with 3.3V logic systems? A12: Yes, it can interface with 3.3V logic systems but may require voltage level shifting depending on the configuration.

Q13: How is the TJA1043T used for diagnostics? A13: The SDO pin can be used for serial data output, often used in diagnostics or programming setups.

Q14: Can the TJA1043T be used in industrial networks? A14: Yes, it is commonly used in industrial applications for CAN bus communication.

Q15: How does the TJA1043T handle bus arbitration? A15: The TJA1043T supports CAN bus arbitration as part of its CAN protocol capabilities, ensuring that data collisions are managed.

**Q16: What is the role of the *TXD* pin on the TJA1043T?** A16: The TXD pin is used to input data signals that are transmitted to the CAN network.

Q17: Can the TJA1043T be used in low-power applications? A17: Yes, the TJA1043T supports low-power operation, particularly in Sleep mode.

Q18: Is the TJA1043T compliant with ISO 11898-2 standards? A18: Yes, it is compliant with the ISO 11898-2 standard for high-speed CAN bus communication.

**Q19: What is the role of the *RS* pin on the TJA1043T?** A19: The RS pin is used to initiate the wake-up process or enable the transceiver from sleep mode.

Q20: Does the TJA1043T support fault detection on the CAN bus? A20: Yes, the TJA1043T includes fault detection mechanisms to protect the device and ensure reliable communication.

This response contains an overview of the pinout, packaging, and principles of the TJA1043T, along with a detailed FAQ section. Let me know if you need any further clarification!