TJA1042TK/3/1J

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1. Describe

The TJA1042TK/3/1J high-speed CAN transceiver 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 functionality for microcontroller (with) CAN

protocol controller. The TJA1042 is part of NXP's third-generation high-speed CAN transceiver semiconductors and represents a significant improvement over first- and second-generation devices such as the TJA1040. It offers improved electromagnetic compatibility (EMC) and electrostatic discharge (ESD) performance, plus:

    1. Ideal passive behavior of the CAN bus when the supply voltage is off

    2. Very low current standby mode with bus wake-up capability

    2. The TJA1042T/3 and TJA1042TK/3 can interface directly with microcontrollers with a supply voltage of 3 V to 5 V The TJA1042 implements the CAN physical layer as defined in ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5. 

2. Feature

    1. general

        - Compliant with ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5

        - Guaranteed timing for CAN FD fast phase data rates up to 5 Mbit/s

        - For 12 V and 24 V systems

        - Low Electromagnetic Emissions (EME) and High Electromagnetic Immunity (EMI)

        - VIO input on TJA1042T/3 and TJA1042TK/3 allows direct connection to 3 V to 5 V microcontrollers

        - SPLIT voltage output on TJA1042T for stabilizing recessive bus levels

        - Available in SO8 and leadless HVSON8 packages with improved automatic optical inspection (AOI) capabilities

        - Dark green products

        - Compliant with AEC-Q100

    2. Predictable and fail-safe behavior

        - Very low current standby mode with host and bus wake-up capability

        - Predictable functional behavior under all supply conditions

        - Transceiver disconnected from bus when not powered (zero load)

        - Transmit data (TXD) explicit timeout function

        - Bus dominant timeout function in standby mode

        - Brown-out detection on VCC and VIO pins

    3. Protect

        - High ESD handling capability on bus pins (8 kV)

        - High voltage robustness on CAN pins (58 V)

        - Protects bus pins from transients in automotive environments

        - Thermal protection

3. Pin configuration

4. Pin description

5. Functional description

The TJA1042TK/3/1J is a HS-CAN stand-alone transceiver with Standby mode. It combines the functionality of the PCA82C250, PCA82C251 and TJA1040 transceivers with improved EMC and ESD handling capability and quiescent current performance. Improved slope control and high DC handling capability on the bus pins provide additional application flexibility. The TJA1042 is available in two versions, distinguished only by the function of pin 5:

    1. The TJA1042T is backwards compatible with the TJA1040 when used with a 5 V microcontroller, and also covers existing PCA82C250 and PCA82C251 applications

    2. The TJA1042T/3 and TJA1042TK/3 allow for direct interfacing to microcontrollers with supply voltages down to 3 V