SN65HVD230 High-Speed CAN Transceiver Module - 3.3V Logic for Arduino & ESP32

Specifications

• Chipset: Texas Instruments SN65HVD230.

• Operating Voltage: 3.3V DC (Full compatibility with 3.3V logic).

• Data Rate: Up to 1 Mbps.

• Nodes: Supports up to 120 nodes on a single bus.

• Protection: High ESD protection for bus pins; Thermal shutdown protection.

• Operating Modes: High-speed, Slope control, and Standby (Low Power).

• Compatibility: Fully compatible with the ISO 11898 standard.

• Form Factor: Compact breakout with standard 2.54mm pitch headers.

Key Applications & Projects

• Automotive Diagnostics: Build an OBD-II logger for your car using an ESP32.

• Industrial Automation: Interfacing microcontrollers with PLCs and motor drivers.

• Drones & Robotics: Implementing high-reliability communication between sensors and flight controllers.

• Energy Management: Monitoring battery banks and solar inverters via CAN.

Project Evolution

• Past Projects (Prerequisites): If you've mastered UART and I2C but found they fail over long distances or in noisy environments, you're ready for CAN.

• Feature Upgrade: This module unlocks Differential Signalling. While single-wire communication fails due to noise, the SN65HVD230 uses a balanced pair to cancel out interference, allowing cables to run much longer (up to 1km at lower speeds).

• Effort/Requirements: Intermediate. You will need a CAN controller (built into ESP32/STM32 or external like MCP2515) and basic knowledge of the CAN protocol.

Virtual Technician & Wiring

⚠️ Tech Tip: Always ensure your CAN bus is terminated with a 120-ohm resistor at both physical ends of the line to prevent signal reflections.

Package Includes: 1 x SN65HVD230 High-Speed CAN Transceiver Module

Frequently Asked Questions (FAQ)

• Does this work with 5V Arduinos? It is designed for 3.3V, but it can interface with 5V logic if a level shifter is used. For native 5V, the TJA1050 is better.
• Is it compatible with the ESP32? Yes, it is the perfect companion for the ESP32’s built-in CAN (TWAI) controller.
• Does it include the 120-ohm resistor? Most modules have it pre-soldered. Check for resistor 'R1' on the board.
• What is the maximum baud rate? 1 Mbps.
• How many devices can I have on the bus? Up to 120 nodes.
• Can I use this for OBD-II? Yes, it is widely used for vehicle diagnostics.
• Does it support CAN FD? No, it is designed for standard CAN 2.0A and 2.0B.
• What wire should I use? Twisted-pair wire is highly recommended for noise immunity.
• Does it have a low-power mode? Yes, it can be put into standby via the 'RS' pin.
• Is it better than the MCP2551? The SN65HVD230 is superior for 3.3V systems as it doesn't require level shifting.
• Can it handle 12V or 24V bus voltages? The bus lines (CANH/L) can, but the VCC must be 3.3V.
• Is it compatible with Raspberry Pi? Yes, it is the standard transceiver used in Pi-CAN hats.
• What is the common-mode range? -2V to 7V.
• How long can the wires be? Up to 1km at 50kbps; ~40m at 1Mbps.
• Does it protect against short circuits? Yes, it has built-in bus-fault protection.
• Is it industrial grade? Yes, the chip is rated for industrial temperature ranges.
• What is the "RS" pin for? It selects the mode (High-speed, Slope control, or Standby).
• Can I use it with the MCP2515? Yes, they work perfectly together for MCUs without a built-in CAN controller.
• What happens if I swap CANH and CANL? Communication will fail, but the module is usually protected against this error.
• Is the chip genuine? Yes, we source verified SN65HVD230 transceivers to ensure performance.