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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 able to be powered from a 3,3 V or 5,0 V supply providing true I/O voltage levels for 3,3 V or 5,0 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. Similarly, extremely low electromagnetic emission is achieved by the excellent matching of the output signals.

The transceiver is intended for high-speed automotive and industrial applications, requiring baud rates up to 1 Mbit/s. It provides differential transmit capability to the bus and differential receiver capability to the CAN protocol controller.

A current-limiting circuit protects the transmitter output stage from damage caused by accidental short circuit to either positive or negative supply voltage.

A thermal protection circuit protects the IC from damage by switching off the transmitter if the junction temperature exceeds 160 °C. All other IC functions continue to operate. The thermal protection circuit is particularly needed when a bus line short circuits. The pins CANH and CANL are protected from electrical transients like those found in automotive environments.