Texas Instruments has introduced their TCAN4550, a CAN FD stand-alone controller with integrated (on-chip) transceiver. The TCAN4550 represents an interface between a CAN Bus network and a host controller through a serial peripheral interface (18-MHz SPI).

It supports the Classical CAN and the CAN FD data link layer. In addition, the chip comes with CAN FD transceiver functionality: differential transmit capability to the bus lines, and differential receiving capability from the CAN Bus connection. The controller supports wake-up functionality via local wake-up (LWU) and bus wake-up using the Wake-up Pattern (WUP) as defined in ISO 11898-2:2016.

The integrated circuitry incorporates protection features including a failsafe mode, an internal dominant state timeout, a full bus operating range, and a timeout watchdog.

The chip comes in a 20-pin VQFN package measuring 4.5 mm by 3.5 mm. It is very well suitable for automotive as well as industrial and building automation applications. It features a +/- 42-VDC bus-fault detection and +/-12-VDC common-mode. When not powered, the logic and bus signals maintain high resistance.

Features

• CAN FD Controller with Integrated CAN Transceiver and Serial Peripheral Interface (SPI)
• CAN FD Controller Supports both ISO 11898-1:2015 and Bosch M_CAN Revision 3.2.1.1
• Meets the Requirements of ISO 11898-2:2016
• CAN FD Data Rates up to 5 Mbps with up to 18 MHz SPI Clock Speed
• Classic CAN Backwards Compatible
• Operating Modes: Normal, Standby, Sleep, and Failsafe Available:
• 3.3 V to 5 V Input/Output Logic Support for Microprocessors
• Wide Operating Ranges on CAN Bus
  • ± 42 VDC Bus Fault Protection
  • ± 12 VDC Common Mode
• Optimized Behavior when Unpowered
  • Bus and Logic Terminals are High Impedance
    (No Load to Operating Bus or Application)
  • Power Up and Down Glitch Free Operation

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CAN FD Breakout Board With SPI Interface

The CAN FD breakout board utilizes the Microchip MCP2517FD CAN FD controller in combination with the MCP2562FD CAN Bus transceiver.

The MCP2517FD is a cost-effective and small-footprint CAN FD controller that efficiently connects to a microcontroller over an SPI interface. 

Consequently, the CAN FD channel presents an extension to a microcontroller that is either lacking a CAN FD peripheral, or that doesn’t have sufficient CAN FD channels.

The MCP2517FD supports both, CAN Bus data frames in the Classical format (CAN2.0 A/B) and CAN Flexible Data Rate (CAN FD) format.

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