TJA1044T

2.1 General

• Fully ISO 11898-2:2016, SAE J2284-1 to SAE J2284-5 and SAE J1939-14 compliant
• Very low-current Standby mode with local and bus wake-up capability
• Optimized for use in 12 V automotive systems
• Low Electromagnetic Emission (EME) and high Electromagnetic Immunity (EMI),
according to proposed EMC Standards IEC 62228-3 and SAE J2962-2
• AEC-Q100 qualified
• Dark green product (halogen free and Restriction of Hazardous Substances (RoHS)
compliant)
• Variants with a VIO pin allow for direct interfacing with 3.3 V to 5 V microcontrollers.
Variants without a VIO pin can interface with 3.3 V (except TJA1044C) and 5 V-supplied
microcontrollers, provided the microcontroller I/Os are 5 V tolerant.

• Shorter propagation delay on the TJA1044B and TJA1044C variants supports larger
network topologies (see Table 8)
• Both VIO and non-VIO variants are available in SO8 and leadless HVSON8 (3.0 mm
× 3.0 mm) packages; HVSON8 with improved Automated Optical Inspection (AOI)
capability.

2.2 Predictable and fail-safe behavior
• Functional behavior predictable under all supply conditions
• Transceiver disengages from the bus (high-ohmic) when the supply voltage drops
below the switch-off undervoltage threshold
• Transmit Data (TXD) dominant time-out functions
• Internal biasing of TXD and STB input pins
2.3 Low-power management
• Very low-current Standby mode with host and bus wake-up capability
• Variants with VIO pin: CAN wake-up receiver powered by VIO allowing VCC to be shut
down
• Variants with VIO pin and TJA1044C: CAN wake-up pattern filter time of 0.5 μs to
1.8 μs, meeting Classical CAN and CAN FD requirements
2.4 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 pins VCC and VIO
• Thermally protected
2.5 TJA1044 CAN FD (applicable to all product variants except
TJA1044T)
• Timing guaranteed for CAN FD data rates up to 5 Mbit/s

Categories: Networks and Interfaces, Transceivers

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SPECIFICATION

The TJA1044 is part of the Mantis family of high-speed CAN transceivers. It 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 TJA1044 offers a feature set optimized for 12 V automotive applications, with
significant improvements over NXP’s first- and second-generation CAN transceivers,
such as the TJA1040 and TJA1042, 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
• Excellent EMC performance, even without a common mode choke
• Variants with a VIO pin can be interfaced directly with microcontrollers with supply
voltages from 3.3 V to 5 V
These features make the TJA1044 an excellent choice for all types of HS-CAN, 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 ISO 11898-2:2016 and
SAE J2284-1 to SAE J2284-5. The TJA1044T is specified for data rates up to 1 Mbit/s.
Additional timing parameters defining loop delay symmetry are specified for the other
variants. This implementation enables reliable communication in the CAN FD fast phase
at data rates up to 5 Mbit/s. The TJA1044B and TJA1044C feature shorter propagation
delay, supporting larger network topologies.