【High-Speed CAN Communication】 1 Mbps data rate; 112-node support; 4.5V to 5.5V power supply; compatible with 5V logic systems and 12V/24V bus Settings
【Robust Protection Features】 Short-circuit protection up to ±45V; thermal shutdown at >150°C; undervoltage lockout below 4.25V; TXD dominant timeout protection to prevent bus lock
【Reliable Performance】 Operates from -40°C to +85°C; differential signaling suppresses noise; 120Ω termination resistor required for stable communication
【Easy Integration Support】 In-line 8P terminal block; 2.54mm pin compatibility; supports for Arduino, for Raspberry Pi, STM32; 10kΩ pull-up resistor on RXD for reliable signal reception
【Low-Power and EMI-Optimized Design】 Slope control mode reduces radio frequency interference; 1.8µA sleep current; Rs pin configurable for high-speed or low-power operation

Key Parameters

Core Chip: MCP2551 (Microchip , ISO 11898 Compliant)

Supply Voltage: 4.5V-5.5V DC (5V Logic Compatible, Supports 12V/24V Bus Settings)

Communication Rate: Up to 1 Mbps (Supports 112 Bus Nodes)

Protection: Short-Circuit (±45V Tolerance), Thermal Shutdown (>150°C), Undervoltage Lockout (UVLO

Operating Temperature: -40°C to +85°C (Reliable)

Interface: 8-Pin Terminal Block (2.54mm Pitch)
Pin Functions

VDD (Pin 8): Power Input (4.5V-5.5V). Use 10μF Electrolytic + 100nF Ceramic Capacitors.

GND (Pin 4): Power Ground. Star Point Grounding Recommended.

TXD (Pin 1): Data Input (Microcontroller TX). Series 220Ω Resistor for Ringing Suppression.

RXD (Pin 2): Data Output (Microcontroller RX). Parallel 10kΩ Pull-Up to VDD.

Rs (Pin 3): Mode Control: Floating = High-Speed, 47kΩ to GND = Slope Control (EMI Reduction), GND = Low-Power Standby.

CANH (Pin 7): Bus High-Level Line. Twist with CANL (Pitch ≤20mm), Terminate with 120Ω Resistor.

CANL (Pin 6): Bus Low-Level Line. Length Deviation from CANH ≤2mm.

FAQ

1.
Communication Failure?

Check Terminal Resistors (120Ω at Both Ends).

Verify Baud Rate Consistency Across Nodes.

Confirm CANH/CANL Wiring Polarity.

2.
Module Overheating?

Check for Bus Short-Circuit (CANH-CANL Resistance >60Ω).

Reduce Node Count for High Baud Rates (>20 Nodes).

Switch to Slope Control Mode (Rs=47kΩ) to Reduce EMI/Heat.

3.
3.3V Microcontroller Compatibility?

Direct Connection Supported (TXD High-Level Threshold: 1.8V).

Add Series 1kΩ Resistor to RXD for MCU Protection.

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