What is CAN Controller : Top Manufacturers & Suppliers

A CAN controller is an electronic component that manages communication on a Controller Area Network (CAN), enabling reliable data exchange between microcontrollers, sensors, actuators, and other devices. Widely used in automotive, industrial automation, medical equipment and embedded systems, CAN controllers help ensure efficient, real time, and fault tolerant network communication. The popular manufacturers are Microchip, NXP, Infineon, STMicroelectronics etc.

In modern automotive and industrial applications, CAN controllers are central to enabling reliable, standardized communication between multiple electronic control units (ECUs) on a CAN bus.

CAN Controller Selection Guide

These controllers implement the protocol stack which performs framing, arbitration, error detectio (using CRC) and message handling. It coordinate with a physical layer transceiver to send and receive data across the CAN bus. It should be compliant with CAN 2.0 or CAN FD or CAN XL standards.

1. Integrated Vs. Standalone : Whether to use microcontroller having built-in CAN controller or a standalone CAN controller.
2. Choose protocol version of CAN such as classical CAN or CAN-FD or CAN-XL as per data rate and payload size requirements.
3. Number of channels required to interface different networks.
4. Buffer size to store incoming/outgoing messages. More is better to reduce the risk of message loss and to lower the load of CPU.
5. Ensure logic level voltage of controller e.g. 3.3V or 5V matches with host MCU and other system components.
6. Select appropriate temperature grade as per environment requirements.

CAN Controller Chip Manufacturers

A robust CAN controller from a reputable manufacturer ensures compliance with CAN standards. It enables scalable, efficient and interoperable network designs for embedded systems, vehicles and industrial automation.

Manufacturers	Product with Features
Microchip Technology	MCP2515 : A very popular and widely used standalone CAN controller with an SPI interface. MCP2518FD : An external CAN FD controller with an SPI interface, allowing any MCU to connect to a CAN FD bus. AT90CAN128 : 8 bit AVR microcontroller with integrated CAN controller. Other parts : PIC32MX series, dsPIC33C series, ATSAME51 series etc.
NXP Semiconductors	SJA1000 : A standalone CAN controller, widely used in automotive and industrial applications., LPC17xx series : ARM Cortex-M3 based microcontrollers with integrated CAN 2.0B controllers, S32K series : ARM MCU with CAN FD controller.
STMicroelectronics	STM32F103 series : integrated bxCAN (Basic Extended CAN) controllers, STM32F4 series etc.
Infineon Technologies	XMC4000 series (e.g., XMC4500) :ARM Cortex-M4 based industrial microcontrollers with integrated CAN modules.

CAN Controller based modules

• MikroElektronika produces wide range of “Click boards” such as MIKROE-2575 (CAN FD Click) and MIKROE-679 (CAN SPI Click 3.3V)
• SparkFun Electronics part number DEV-13262 is arduino shield based on MCP2515 (controller) and MCP2551 (transceiver).
• Adafruit Industries offers various boards and modules. One such part number is 4108 (Adafruit CAN PAL).
• Seeed Studio 114990223 (CAN-BUS Shield V2) is an arduino shield that uses MCP2515 controller.

Comparison between CAN Controller & CAN Transceiver

Feature	CAN Controller	CAN Transceiver
OSI model layer	Layer-2 (Data Link Layer) : Handles message framing, arbitration and error checking.	Layer-1 (Physical Layer) : Handles bit timing, voltage levels and physical connection to the wires.
Primary role	Protocol Management : Manages the rules, logic and framing of CAN messages	Physical Signaling : Converts signals between digital and electrical domains
Connection Interface	Connects to the main Microcontroller/CPU (via SPI, internal bus etc.) and to the Transceiver (via digital TX/RX pins).	Connects to the CAN Controller (via digital TX/RX pins) and to the physical CAN bus (via CAN_H/CAN_L pins).
Intelligence built-in	High, understands and enforces CAN protocol	Low, it has no knowledge of CAN protocol; it only converts voltage levels on its digital input
Signals handled by them	Digital Logic : Processes single ended digital signals (TTL/CMOS 1’s and 0’s) from/to the MCU.	Differential Analog : Creates and reads differential voltage signals on the CAN_H and CAN_L bus lines.

Summary

A CAN controller is a hardware component that handles data transmission, reception, error detection, and message filtering on a Controller Area Network (CAN). Leading CAN controller manufacturers and suppliers include NXP Semiconductors, Microchip Technology, Texas Instruments, Infineon Technologies and STMicroelectronics.