The is a high-speed CAN transceiver that acts as the interface between a CAN protocol controller (like the MCP2515) and the physical bus. Because standard versions of Proteus do not always include a native simulation model for this specific chip, users typically rely on third-party libraries or the integrated web search feature. 1. Finding the MCP2551 in Proteus
Without a proper Proteus model, you cannot verify your CAN transceiver stage. Hence, the need for a specific is paramount.
In a Proteus simulation, the MCP2551 acts as the bridge between a CAN Controller (like a PIC microcontroller or Arduino with an MCP2515 ) and the CAN bus. TXD (Pin 1): Connect to the Controller's TX pin. RXD (Pin 4): Connect to the Controller's RX pin.