3.3V CAN transceivers

3.3V and 5V CAN transceivers are interoperable because High Speed CAN physical layer uses differential signaling that is the same for a 3.3V and 5V CAN transceiver. In addition both the 3.3V and 5V CAN transceivers have the same wide common mode range accommodating not only the typical signaling but also providing wide margin for ground shift potential. 

TI Doc – Overview of 3.3V CAN

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