TJA1145TK/FDJ

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1. Describe

The TJA1145TK/FDJ is a high-speed CAN transceiver that provides an interface between a Controller Area Network (CAN) protocol controller and a physical two-wire CAN bus. Designed for high-speed CAN applications in the automotive industry, this transceiver provides differential transmit and receive capability for microcontrollers (with) CAN protocol controllers. The TJA1145 has very low power consumption in standby and sleep modes, and optionally supports CAN partial wake-on-LAN according to ISO 11898-2:2016. Dedicated implementations of some network functions have been embedded in the TJA1145/FD variants TJA1145T/FD and TJA1145TK/FD. This feature is called "FD-passive" and can ignore FD frames when CAN is in sleep/standby mode waiting for a valid wakeup frame. The functionality of this additional partial network is well suited to support both CAN FD and standard CAN 2.0 communication. It allows unwanted normal CAN controllers to communicate CAN FD messages to keep the partial network sleep/standby mode without bus errors during CAN FD communication. Advanced power management regulates power to the entire node and supports local and remote wake-up capabilities. The I/O level is automatically adjusted to the level of the I/O controller, allowing the TJA1145 to interface directly with 3.3 V to 5 V microcontrollers. An SPI interface status information is provided for transceiver control and retrieval. When the power is off, the bus connection is truly floating. The TJA1145 implements the CAN physical layer as defined in ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-4. This implementation enables reliable communication CAN FD fast phase with data rates up to 2 Mbit/s. These features make the TJA1145 ideal for high-speed CAN networks containing nodes that are always connected to the battery power line, but are activated only when the application requires it to minimize current consumption.

2. Features

    1. ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-4 compliant

    2. Timing guaranteed for data rates up to 2 Mbit/s

    3. Autonomous bus biasing according to ISO 11898-2:2016

    4. Optimized for in-vehicle high-speed CAN communication

    5. No ‘false’ wake-ups due to CAN FD in TJA1145/FD variants

3. Designed for automotive applications

    1. ±8 kV ElectroStatic Discharge (ESD) protection, according to the Human Body Model (HBM) on the CAN bus pins

    2. ±6 kV ESD protection, according to IEC 61000-4-2 on pins BAT and WAKE and on the CAN bus pins

    3. CAN bus pins short-circuit proof to ±58 V

    4. Battery and CAN bus pins protected against transients according to ISO 7637-3, test pulses 1, 2a, 3a and 3b.

    5. Suitable for use in 12 V and 24 V systems

    6. Available in SO14 and leadless HVSON14 package (3 mm × 4.5 mm) with improved Automated Optical Inspection (AOI) capability

    7. AEC-Q100 qualified

    8. Dark green product 

4. Advanced ECU power management system

    1. Very low-current Standby and Sleep modes, with full wake-up capability

    2. Entire node can be powered down via the inhibit output

    3. Remote wake-up capability via standard CAN wake-up pattern or via ISO 11898-2:2016 compliant selective wake-up frame detection

    4. Local wake-up via the WAKE pin

    5. Wake-up source recognition

    6. Bit rates of 50 kbit/s, 100 kbit/s, 125 kbit/s, 250 kbit/s, 500 kbit/s and 1 Mbit/s supported during selective wake-up'

    7. Local and/or remote wake-up can be disabled to reduce current consumption

    8. Transceiver disengages from the bus when the battery supply is removed

    9. VIO input allows for direct interfacing with 3.3 V to 5 V microcontrollers

5. Pin configuration

6. Pin Description

7. High-speed CAN transceiver

Integrated high-speed CAN transceiver designed for bit-active communication Provides differential transmit and receive capability for CAN protocol at rates up to 1 Mbit/s controller. The transceiver complies with ISO 11898-2:2016 (defining high-speed CAN and selective wake-up function and autonomous bus bias). CAN transmitter is The power supply is supplied via pin VCC while the CAN receiver is supplied via pin BAT. TJA1145 Includes additional timing parameters for loop delay symmetry to ensure reliability Fast phase communication with data rates up to 2 Mbit/s used in CAN FD networks. CAN transceiver supports autonomous CAN biasing to help minimize RF emission. CANH and CANL are always biased at 2.5 V when the transceiver is active Or listen-only mode (CMC = 01/10/11). Autonomous Bias active in CAN Offline mode - 2.5 V if there is activity on the bus (CAN Offline Bias mode) Connect to GND if there is no activity on the bus during t > tto (silent) (CAN offline mode). This is useful when the node is disabled due to microcontroller failure or When the CAN portion of the network is enabled. The TJA1145 ensures that the CAN bus is Correctly biased to avoid interfering with ongoing communications between other nodes. This The autonomous CAN bias voltage comes directly from VBAT.