TJA1043TK-1Y Detailed explanation of pin function specifications and circuit principle instructions
The TJA1043TK/1Y is a specific model from NXP Semiconductors, a global leader in the development of semiconductor solutions. This model is a CAN transceiver designed for communication in a Controller Area Network (CAN) system, which is widely used in automotive and industrial applications.
Packaging and Pin Functionality
The TJA1043TK/1Y is typically available in a VQFN-14 (Very Thin Quad Flat No-lead) package, which has 14 pins. Here is the detailed pin function list for this 14-pin package:
Pin Number Pin Name Pin Function Description 1 VCC Power supply input (5V). Connect to the 5V supply voltage. 2 VIO Input/Output voltage for logic. Connect to the appropriate supply voltage level for the I/O logic of the system. 3 CANH CAN Bus High Pin. Used for the high side of the differential signal in CAN communication. 4 CANL CAN Bus Low Pin. Used for the low side of the differential signal in CAN communication. 5 GND Ground connection. Connect to system ground. 6 RxD Receiver Data Pin. Receives CAN data signals from the CAN bus. 7 TxD Transmitter Data Pin. Transmits CAN data signals to the CAN bus. 8 VREF Reference voltage for the CAN transceiver. This pin provides the reference for voltage detection. 9 Slope Slope control pin. This pin is used to control the slope of the CAN signal output. 10 EN Enable Pin. Activates or deactivates the CAN transceiver. A logic high enables the transceiver; a logic low disables it. 11 STB Standby Pin. If high, the transceiver enters a low power standby mode. 12 CANH CAN Bus High (again). The second pin for CAN High for redundancy in some configurations. 13 CANL CAN Bus Low (again). The second pin for CAN Low for redundancy in some configurations. 14 N/C No connection. Not connected internally, can be left unconnected externally.Pin Function Detailed Overview
Pin 1 (VCC): This is the power supply input for the device. It should be connected to a stable 5V power supply. This pin is critical for the operation of the transceiver. Pin 2 (VIO): The voltage for logic inputs/outputs. Typically connected to a logic voltage (3.3V or 5V depending on the system). Pin 3 (CANH): The high side of the differential signal for CAN communication. This pin should be connected to the high wire of the CAN network. Pin 4 (CANL): The low side of the differential signal for CAN communication. Connect this pin to the low wire of the CAN network. Pin 5 (GND): The ground connection for the IC, which should be connected to the system's ground. Pin 6 (RxD): This pin is used to receive CAN data signals from the bus. It outputs the received data to the microcontroller or other system. Pin 7 (TxD): The pin for transmitting CAN data signals to the bus. It outputs the data from the microcontroller or other system. Pin 8 (VREF): This is the reference voltage used by the CAN transceiver to detect the high and low states of the CAN signals. It should be connected to a reference voltage source. Pin 9 (Slope): Used to control the slew rate of the CAN output signals. Adjusting this pin can optimize the signal quality for different network configurations. Pin 10 (EN): This pin enables or disables the CAN transceiver. A logic high enables the operation of the transceiver, while a logic low puts the transceiver into a disabled state. Pin 11 (STB): Used to place the device in a low-power standby mode when set high. This helps reduce power consumption during inactive periods. Pin 12 (CANH): The second pin for the CAN high wire (redundancy). It is used in some configurations where multiple CAN transceivers are needed. Pin 13 (CANL): The second pin for the CAN low wire (redundancy). Like pin 12, used for redundancy or in multi-transceiver configurations. Pin 14 (N/C): This pin has no internal connection, so it can be left unconnected.20 Frequently Asked Questions (FAQ)
Q: What is the voltage supply required for the TJA1043TK/1Y? A: The TJA1043TK/1Y requires a 5V power supply connected to the VCC pin (Pin 1).
Q: Can I use the TJA1043TK/1Y with 3.3V logic? A: Yes, you can use it with 3.3V logic by connecting the VIO pin (Pin 2) to a 3.3V supply.
Q: What is the function of the RxD pin? A: The RxD pin (Pin 6) is used to receive CAN data signals from the bus.
Q: How does the TJA1043TK/1Y transmit data? A: It transmits data via the TxD pin (Pin 7), sending signals to the CAN bus.
Q: What happens if the EN pin is set to low? A: If the EN pin (Pin 10) is set to low, the TJA1043TK/1Y is disabled and will not communicate on the CAN bus.
Q: What is the purpose of the VREF pin? A: The VREF pin (Pin 8) provides the reference voltage for detecting the logic levels of the CAN signals.
Q: How do I enable the TJA1043TK/1Y transceiver? A: To enable the transceiver, the EN pin (Pin 10) must be set to a high logic level.
Q: Can the TJA1043TK/1Y work with different CAN bus speeds? A: Yes, the device supports various CAN bus speeds, and the slew rate can be adjusted via the Slope pin (Pin 9).
Q: What is the function of the CANH and CANL pins? A: CANH (Pin 3) and CANL (Pin 4) are used for the differential signal transmission and reception on the CAN network.
Q: Can I leave the N/C pin unconnected? A: Yes, the N/C pin (Pin 14) is not connected internally, so it can be left unconnected.
Q: How can I reduce power consumption with the TJA1043TK/1Y? A: You can reduce power consumption by setting the STB pin (Pin 11) high, which places the device into standby mode.
Q: How can I adjust the signal quality for my CAN network? A: The Slope pin (Pin 9) can be used to adjust the slew rate of the output CAN signals, optimizing the signal quality for the network.
Q: What should I do if the device is not communicating? A: Check the VCC, VIO, EN, and CANH/CANL connections, ensuring proper voltage levels and signal integrity.
Q: Is the TJA1043TK/1Y compatible with both 3.3V and 5V systems? A: Yes, it is compatible with both 3.3V and 5V systems by adjusting the VIO pin accordingly.
Q: What is the maximum voltage for the VCC pin? A: The VCC pin (Pin 1) should be connected to a 5V supply, with a maximum rating typically around 5.5V.
Q: Can I use the TJA1043TK/1Y for long-distance CAN communication? A: Yes, the TJA1043TK/1Y is designed for reliable communication in long-distance and high-speed CAN applications.
Q: What type of package does the TJA1043TK/1Y come in? A: The TJA1043TK/1Y comes in a 14-pin VQFN package, which is a small, surface-mount form factor.
Q: What should I connect to the ground pin (Pin 5)? A: Pin 5 (GND) should be connected to the system ground to provide a common reference for the IC.
Q: Is the TJA1043TK/1Y suitable for automotive applications? A: Yes, it is ideal for automotive applications, supporting the CAN protocol commonly used in vehicles.
Q: How do I ensure proper CAN signal integrity? A: Proper termination and wiring of the CANH and CANL pins, along with the correct use of the Slope and VREF pins, will ensure good signal integrity.
This detailed explanation provides the pin functionality for the TJA1043TK/1Y transceiver, as well as common FAQs and other important considerations for its use.
