MCP2515 CAN Controller Specifications and Applications

ElecSuppliers Part Number GuideSep 26, 2026

The MCP2515 is a stand-alone Controller Area Network (CAN) controller from Microchip Technology. It supports the CAN 2.0B protocol and connects to a host microcontroller through a standard SPI interface.

The device is designed for applications where the main MCU does not have an integrated CAN controller or where an external CAN interface is preferred. MCP2515 supports both standard and extended CAN frames and provides hardware-based message filtering to reduce the processing load on the host MCU.

The MCP2515 is currently listed by Microchip as an in-production device and is also recommended for automotive design with applicable automotive-grade ordering options.

MCP2515 Key Specifications

The MCP2515 supports CAN communication at data rates up to 1 Mbps and operates from a supply voltage of 2.7V to 5.5V. Its SPI interface supports speeds up to 10 MHz, allowing the host MCU to configure the controller and exchange CAN data efficiently.

The controller supports two receive buffers and three transmit buffers. Six 29-bit acceptance filters and two 29-bit masks allow incoming CAN messages to be selectively accepted according to their identifiers.

The MCP2515 supports both standard and extended CAN frames, with a data field of up to 8 bytes per frame. It also includes one-shot transmission mode, programmable clock output, interrupt functions, and configurable request-to-send inputs.

The device supports industrial temperature operation from -40°C to +85°C and extended temperature operation from -40°C to +125°C, depending on the ordering option.

MCP2515 CAN 2.0B Support

The MCP2515 implements CAN Version 2.0B and supports standard 11-bit identifiers as well as extended 29-bit identifiers. It can transmit and receive data frames and remote frames used in traditional CAN networks.

The maximum CAN data rate is 1 Mbps. Because MCP2515 is a classical CAN controller, it does not support CAN FD communication.

This distinction is important when selecting a CAN controller for a new design. Systems that require CAN FD features such as larger payloads or higher data-phase bit rates need a CAN FD-capable controller instead of MCP2515.

MCP2515 SPI Interface

One of the main advantages of MCP2515 is its SPI interface. The controller communicates with an external MCU through SPI signals including SCK, SI, SO, and chip select.

This architecture allows MCP2515 to work with a wide range of microcontrollers that provide SPI functionality. The host MCU does not need to include a dedicated CAN peripheral, making the MCP2515 useful for embedded designs based on different MCU families.

The SPI interface supports speeds up to 10 MHz, while the MCP2515 handles CAN protocol functions internally.

MCP2515 Message Filtering

Message filtering is an important feature of MCP2515. The controller provides six 29-bit acceptance filters and two 29-bit acceptance masks.

These functions allow the system designer to define which CAN identifiers should be accepted by the receive buffers. Unwanted messages can be filtered at the CAN controller instead of being passed to the MCU for software processing.

This can be useful in networks with multiple CAN nodes, where a device may only need to process messages associated with specific identifiers.

MCP2515 Transmit and Receive Functions

MCP2515 includes two receive buffers with prioritized message storage and three transmit buffers with prioritization and abort functions.

The receive architecture allows incoming CAN messages to be stored before the host MCU reads them through SPI. The transmit buffers allow multiple messages to be prepared for transmission and managed according to their priority.

The controller also provides interrupt outputs that can notify the MCU when specific CAN events occur. This allows firmware to respond to received messages without continuously polling the device.

MCP2515 Package Options

MCP2515 is available in several package configurations, including 18-lead PDIP and SOIC versions, as well as 20-lead TSSOP and QFN options.

Package selection depends on PCB space, assembly requirements, thermal considerations, and the mechanical requirements of the final product.

For compact embedded systems and high-density PCB designs, smaller surface-mount packages can be more suitable. Through-hole packages may be useful for development boards, prototypes, educational systems, and applications where manual assembly is required.

MCP2515 Applications

MCP2515 can be used in automotive electronics, industrial automation, embedded control systems, instrumentation, mobile equipment, and CAN communication interfaces.

In automotive applications, it can provide CAN controller functionality for systems that require communication between electronic control units and other vehicle devices.

In industrial equipment, MCP2515 can be used to connect controllers, sensors, motor control systems, PLC-related equipment, and other networked devices through a CAN bus.

The device is also suitable for embedded development boards and communication modules where an MCU needs to communicate with an existing CAN network through an SPI interface.

MCP2515 Design Considerations

When designing with MCP2515, the CAN physical layer should be considered separately from the CAN controller. MCP2515 provides CAN protocol control but does not integrate the CAN transceiver required to electrically interface with the CAN bus.

A compatible CAN transceiver is therefore required between MCP2515 and the physical CAN network.

The system designer should also select the appropriate oscillator frequency, configure CAN bit timing correctly, and ensure that the CAN bus termination and wiring meet the requirements of the application.

SPI communication between the MCU and MCP2515 should also be configured according to the device timing requirements. Interrupt handling can be used to improve communication efficiency, particularly when the CAN network is handling frequent messages.

MCP2515 Sourcing Considerations

When sourcing MCP2515, buyers should confirm the complete manufacturer part number, package type, temperature grade, date code, and required quantity.

For production orders, it is also important to verify whether the offered devices are factory-original parts and whether the supplied package and ordering code match the target PCB design.

For automotive or industrial applications, temperature range and qualification requirements should be checked before purchasing. Different ordering options may have different temperature and qualification specifications even when they share the same basic MCP2515 device name.

MCP2515 remains a practical option for designs requiring classical CAN 2.0B communication through an SPI-connected external CAN controller. Its combination of CAN protocol support, hardware message filtering, multiple transmit and receive buffers, and broad MCU compatibility makes it suitable for a wide range of embedded and industrial communication designs.