The TJA1044 is a high-speed CAN transceiver that provides an interface between aController 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 CANprotocol controller.

The TJA1044 offers a feature set optimized for 12 V automotive applications, withsignificant improvements over NXP's first- and second-generation CAN transceivers, suchas the TJA1040, and excellent ElectroMagnetic Compatibility (EMC) performance.Additionally, the TJA1044 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

These features make the TJA1044 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.

The TJA1044 implements the CAN physical layer as defined in the current ISO11898standard (ISO11898-2:2003, ISO11898-5:2007). The TJA1044T is specified for data ratesup to 1 Mbit/s. Pending the release of the updated version of ISO11898-2 includingCAN FD, additional timing parameters defining loop delay symmetry are specified for theTJA1044GT. This implementation enables reliable communication in the CAN FD fastphase at data rates up to 5 Mbit/s.

General

• Fully ISO 11898-2:2003 and ISO 11898-5:2007 compliant
• Very low-current Standby mode with host and bus wake-up capability
• Optimized for use in 12 V automotive systems
• EMC performance satisfies 'Hardware Requirements for LIN, CAN and FlexRayInterfaces in Automotive Applications’, Version 1.3, May 2012.
• Can interface with 3.3 V and 5 V-supplied microcontrollers, provided themicrocontroller I/Os are 5 V tolerant.
• AEC-Q100 qualified
• Dark green product (halogen free and Restriction of Hazardous Substances (RoHS)compliant)

Predictable and fail-safe behavior

• Functional behavior predictable under all supply conditions
• Transceiver disengages from bus when not powered (zero load)
• Transmit Data (TXD) and bus dominant time-out functions
• Internal biasing of TXD and STB input pins

Protection

• High ESD handling capability on the bus pins (8 kV IEC and HBM)
• Bus pins protected against transients in automotive environments
• Undervoltage detection on pin VCC
• Thermally protected

TJA1044GT

• Loop delay symmetry guaranteed for data rates up to 5 Mbit/s
• Improved TXD to RXD propagation delay of 210 ns