Introduction The AMIS?30663 CAN transceiver is the interface between a controller area network （CAN） protocol controller and the physical bus and may be used in both 12 V and 24 V systems. The digital interface level is powered from a 3.3 V supply providing true I/O voltage levels for 3.3 V CAN controllers. The transceiver provides differential transmit capability to the bus and differential receive capability to the CAN controller. Due to the wide common?mode voltage range of the receiver inputs， the AMIS?30663 is able to reach outstanding levels of electromagnetic susceptibility （EMS）。 Similarly， extremely low electromagnetic emission （EME） is achieved by the excellent matching of the output signals.