JAJSGM4 December 2018 SN55HVD233-SEP
PRODUCTION DATA.
A common-mode signal is an average voltage of the two signal wires that the differential receiver rejects. The common-mode signal comes from the CAN driver, ground noise, and coupled bus noise. The supply voltage of the CAN transceiver has nothing to do with noise. The SN55HVD233-SEP driver lowers the common-mode output in a dominant bit by a couple hundred millivolts from that of most 5-V drivers. While this does not fully comply with ISO 11898, this small variation in the driver common-mode output is rejected by differential receivers and does not effect data, signal noise margins, or error rates.