The TJA1049 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,
supplying the differential transmit and receive capability to (a microcontroller with) a CAN
protocol controller.
The TJA1049 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
- TJA1049T/3 and TJA1049TK/3 can be interfaced directly to microcontrollers with
supply voltages from 3 V to 5 V
The TJA1049 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 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 TJA1049 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.
