MCP2551-I/SN

Drivers, Receivers, Transceivers Overview

The MCP2551-I/SN is a high-speed, fault-tolerant CAN transceiver manufactured by Microchip Technology. It serves as the interface between a CAN protocol controller and the physical bus, fully compatible with ISO-11898 standards including 24V requirements. Operating at speeds up to 1 Mb/s, it supports industrial temperature ranges from -40°C to +85°C. The device features differential transmit and receive capabilities, providing a buffer against high-voltage spikes generated by external sources such as EMI, ESD, and electrical transients. It operates on a supply voltage of 4.5V to 5.5V with a maximum current of 75 mA.

Drivers, Receivers, Transceivers Feature Summary

• Externally-controlled slope for reduced RFI emissions
• Detection of ground fault (permanent Dominant) on TXD input
• Power-on Reset and voltage brown-out protection
• An unpowered node or brown-out event will not disturb the CAN bus
• Low current standby operation
• Protection against damage due to short-circuit conditions (positive or negative battery voltage)
• Protection against high-voltage transients
• Automatic thermal shutdown protection
• Up to 112 nodes can be connected
• High-noise immunity due to differential bus implementation

Drivers, Receivers, Transceivers Applications

• Automotive electronic systems
• Industrial control networks
• Embedded designs requiring CAN communication

Drivers, Receivers, Transceivers Procurement Notes

Verify the component datasheet revision G (December 2016), which explicitly states that the MCP2551 is not recommended for new designs. Confirm whether the application requires a legacy replacement or if an updated part number should be selected instead. Ensure the SOIC package dimensions match the PCB footprint requirements.

Drivers, Receivers, Transceivers Selection Notes

Select this component only for existing designs where the MCP2551 was originally specified. For new projects, consider alternative devices recommended by the manufacturer. Verify that the operating environment falls within the industrial temperature range of -40°C to +85°C. Ensure the system voltage remains within the 4.5V to 5.5V supply limits.

Drivers, Receivers, Transceivers Part Context

The MCP2551 is a member of the MCP2551 family of high-speed CAN transceivers. Variants include the extended temperature version (MCP2551-E/SN) and tape-and-reel packaging options (MCP2551T). The 'I' suffix denotes the industrial temperature grade, while 'SN' indicates the 8-lead SOIC package type.

Drivers, Receivers, Transceivers Replacement Considerations

Microchip recommends using the MCP2561 as a replacement for the MCP2551 in new designs.