Can the 5V powered CAN chip and the 3.3V powered CAN chip communicate normally?

rizhi

Can the 5V powered CAN chip and the 3.3V powered CAN chip communicate normally? [Copy link]

 Can the 5V powered CAN chip and the 3.3V powered CAN chip communicate normally?

rizhi

Occupy a sofa

huaiqiao

I think it should be possible, because the CAN chip mainly does a level conversion. For example, if the 3.3V MCU's TTL is connected to TJA1050 to communicate with other peripherals, it is completely possible. Among them, TJA1050 is a process of converting TTL to CAN level. The recessive level and linear level of CAN are both 2.5V, so whether it is a 5V chip or a 3.3V CAN chip, the CAN level they convert is the same. So communication is possible.

rizhi

huaiqiao posted on 2018-4-26 18:14 I think it should be possible, because the can chip is mainly used for level conversion, such as the 3.3V MCU's TTL connection TJA1050 and other peripherals to communicate...

Thank you

chunyang

CAN, 485, etc. are all 3V and 5V compatible.

wsdymg

Yes. CAN communication itself is a differential signal, and the bus is a 2.5V±1V explicit and implicit signal. The 5V.3V you mentioned refers to the level of the communication interface, right?