The TJF1052i 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 TJF1052i is specifically targeted at industrial applications, 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 electric pumps, elevators or industrial equipment.
Performance: The transceiver is designed for high-speed CAN applications, 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
TJF1052i removes the need for stand-alone isolation. It also improves reliability and
system performance parameters such as loop delay.
The TJF1052i 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 TJF1052i implements the CAN physical layer as defined in the current ISO11898 standard
(ISO11898-2:2003). 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.
The TJF1052i is an excellent choice for all types of industrial CAN networks where
isolation is required for safety reasons or to enhance signal integrity in noisy