High-Speed CAN Transceiver with Standby Mode

TJA1042

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The TJA1042 high-speed CAN transceiver provides an interface between a Controller Area Network (CAN) protocol controller and the physical two-wire CAN bus. The transceiver is designed for high-speed CAN applications in the automotive industry, providing the differential transmit and receive capability to (a microcontroller with) a CAN protocol controller.

The TJA1042 belongs to the third generation of high-speed CAN transceivers from NXP Semiconductors, offering significant improvements over first- and second-generation devices such as the TJA1040. It offers improved ElectroMagnetic Compatibility (EMC) and ElectroStatic Discharge (ESD) performance, and also features:

  • Ideal passive behavior to the CAN bus when the supply voltage is off
  • A very low-current Standby mode with bus wake-up capability
  • TJA1042T/3 and TJA1042TK/3 can be interfaced directly to microcontrollers with supply voltages from 3 V to 5 V

The TJA1042 implements the CAN physical layer as defined in the current ISO11898 standard (ISO11898-2:2003, ISO11898-5:2007) and the pending updated version of ISO 11898-2:2016. Pending the release of the updated version of ISO11898-2:2016 including CAN FD and SAE J2284-4/5, additional timing parameters defining loop delay symmetry are specified. This implementation enables reliable communication in the CAN FD fast phase at data rates up to 5 Mbit/s.

These features make the TJA1042 an excellent choice for all types of HS-CAN networks, in nodes that require a low-power mode with wake-up capability via the CAN bus.

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Block Diagram

TJA1042 Block Diagram

TJA1042 Block Diagram
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Features

General Features

  • Fully ISO 11898-2:2003 and ISO 11898-5:2007 compliant
  • Timing guaranteed for data rates up to 5 Mbit/s in the CAN FD fast phase
  • Suitable for 12 V and 24 V systems
  • Low electromagnetic emission (EME) and high ElectroMagnetic Immunity (EMI)
  • VIO input on TJA1042T/3 and TJA1042TK/3 allows for direct interfacing with 3 V to 5 V microcontrollers
  • SPLIT voltage output on TJA1042T for stabilizing the recessive bus level
  • Available in SO8 package and leadless HVSON8 package (3.0 mm × 3.0 mm) with improved Automated Optical Inspection (AOI) capability
  • Dark green product (halogen-free and Restriction of Hazardous Substances (RoHS) compliant)
  • AEC-Q100 qualified

Predictable and fail-safe behavior

  • Very low-current Standby mode with host and bus wake-up capability
  • Functional behavior predictable under all supply conditions
  • Transceiver disengages from the bus when not powered up (zero loads)
  • Transmit Data (TXD) dominant time-out function
  • Bus-dominant time-out function in Standby mode
  • Undervoltage detection on pins VCC and VIO

Protection

  • High ESD handling capability on the bus pins (±8 kV)
  • High voltage robustness on CAN pins (±58 V)
  • Bus pins protected against transients in automotive environments
  • Thermally protected

Product Longevity Program

  • This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The TJA1042 is included in the 15-year program.

Comparison Table

Part Number New Generation Recommendation
TJA1042T,112 TJA1044GT/1Z
TJA1042T,118 TJA1044GT/1Z
TJA1042T/1J TJA1044GT/1Z
TJA1042T/3,112 TJA1044GT/3Z
TJA1042T/3,118 TJA1044GT/3Z
TJA1042T/3/1J TJA1044GT/3Z
TJA1042T/3/CM,118 TJA1044GT/3Z
TJA1042T/CM,118 TJA1044GT/1Z
TJA1042TK/3,118 TJA1044GTK/3Z
TJA1042TK/3/1J TJA1044GTK/3Z

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