MCP2515-I/SO - 

In addition to microcontrollers with integrated CAN ports, Microchip offers peripherals designed to provide flexible, cost-effective options for implementing complete CAN nodes. The 18-pin MCP2510 is the easiest to use, most cost-effective, stand-alone controller on the market today. It features an industry standard SPI™ serial interface, enabling an easy connection to virtually any microcontroller. With minor software modifications for sending data to and from the MCP2510 SPI port, CAN communication can be added to existing systems through the simple SPI interface without requiring a complete system redesign. The MCP25020, MCP25025, MCP25050 and MCP25055 are a family of CAN I/O Expanders. These products connect to a CAN network and have input/output functionality that can be manipulated over the bus without a microcontroller in the system. This family of CAN I/O Expanders is targeted at thin client CAN nodes where complex functionality is not required. The MCP2551 is an ISO11898 compatible, high speed CAN transceiver. Its industry standard pinout and functionality allow it to be used in existing high speed CAN transceiver applications while offering customers improvements in system robustness.