The TJA1052i is a high-speed CAN transceiver that provides a galvanically isolated interface
between a Controller Area Network (CAN) protocol controller and the physical two-wire
CAN bus. The TJA1052i is specifically targeted at Electric Vehicles (EV) and Hybrid
Electric Vehicles (HEV), where galvanic isolation barriers are needed between the high-
and low-voltage parts.
Safety: Isolation is required for safety reasons, eg. to protect humans from electric
shock or to prevent the electronics being damaged by high voltages.
Signal integrity: The isolator uses proprietary capacitive isolation technology to
transmit and receive CAN signals. This technology enables more reliable data
communications in noisy environments, such as high-voltage battery management systems or
the drive and regeneration systems in EVs and HEVs.
Performance: The transceiver is designed for high-speed CAN applications in the automotive
industry, supplying the differential transmit and receive capability to a CAN protocol
controller in a microcontroller. Integrating the galvanic isolation along with the
transceiver in the TJA1052i removes the need for stand-alone isolation. It also improves
reliability and system performance parameters such as loop delay.
The TJA1052i belongs to the third generation of high-speed CAN transceivers from NXP
Semiconductors, offering significant improvements over first- and second-generation
devices. It offers improved ElectroMagnetic Compatibility (EMC) and ElectroStatic
Discharge (ESD) performance, and also features ideal passive behavior to the CAN bus
when the transceiver supply voltage is off.
The TJA1052i implements the CAN physical layer as defined in the current ISO11898 standard
(ISO11898-2:2003). 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.
The TJA1052i is an excellent choice for all types of automotive and industrial CAN networks where
isolation is required for safety reasons or to enhance signal integrity in noisy