The MCP2551 is a fault-tolerant, high-speed CAN device that can be used as CAN protocol controller and the physical bus interface. MCP2551 provides differential receive capability to the CAN Protocol controller, which is fully in line with ISO-11898 standards, including energy 24V requirements. Typically, each node on the CAN system must have a device, the digital signal is converted into CAN controller generates a signal for bus transport. It also provides high voltage spikes between CAN controllers and CAN bus joined the buffer, these high-pressure spikes may be generated by an external device.