MCP2557FDT-H/SN

Drivers, Receivers, Transceivers Overview

The MCP2557FDT-H/SN is a high-speed CAN FD transceiver manufactured by Microchip Technology, designed for communication speeds up to 8 Mbps. It operates within a supply voltage range of 4.5V to 5.5V on the VDD pin and supports digital I/O voltages from 1.7V to 5.5V on the VIO pin. The device features a maximum propagation delay of 120 ns and includes a Silent Mode controlled by the S pin to disable the transmitter. It provides thermal shutdown protection at approximately 175°C and permanent dominant detection with a typical timeout of 1.9 ms. The component is housed in an SOIC-8 package.

Drivers, Receivers, Transceivers Feature Summary

• Supports CAN FD operation at bit rates up to 8 Mbps with optimized loop delay symmetry.
• Includes Silent Mode functionality to disable the transmitter while maintaining receiver activity.
• Features internal protection against battery short circuits, electrical transients, and thermal overload.
• Digital inputs are compatible with both 3.3V and 5V microcontrollers.

Drivers, Receivers, Transceivers Applications

• Automotive CAN 2.0 and CAN FD networks
• Industrial control systems requiring high-speed communication
• Aerospace and medical equipment interfaces
• Consumer electronics utilizing CAN bus protocols

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'H' and '/SN' against the manufacturer's current Product Identification System documentation to confirm package type and temperature grade. Ensure that the silent mode pin configuration aligns with the system design requirements for disabling the transmitter. Cross-reference the datasheet revision date to validate all electrical characteristics and absolute maximum ratings before finalizing procurement specifications.

Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring CAN FD support at speeds exceeding 2 Mbps. The MCP2557FD variant is appropriate when the digital I/O supply is internally tied to VDD, simplifying power rail management compared to the MCP2558FD which utilizes a separate VIO pin. Consider the SOIC-8 package constraints regarding thermal dissipation and board space availability during the layout phase.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MCP2557FD/8FD family of CAN transceivers. It shares functional similarities with the MCP2558FD but differs in the handling of the digital I/O supply voltage. While the MCP2558FD offers a dedicated VIO pin for independent logic level shifting, the MCP2557FD integrates this supply internally, affecting interface compatibility with varying microcontroller voltage levels.

Drivers, Receivers, Transceivers Replacement Considerations

The MCP2558FDT-H/SN serves as a functional alternative within the same family, distinguished primarily by the presence of a dedicated VIO pin for independent digital I/O supply control. Other members like the MCP2557FD/MF or MCP2557FD/MNY offer different packaging options such as DFN or TDFN variants while maintaining identical electrical performance profiles.

Drivers, Receivers, Transceivers FAQ

How does the Silent Mode function affect the CAN bus?

In Silent Mode, the transmitter is disabled, preventing the device from driving the CAN bus. However, the high-speed differential receiver remains active, allowing the device to monitor bus traffic without transmitting data.

What happens if the TXD input remains Low for an extended period?

The device features Permanent Dominant Detection. If TXD stays Low beyond the typical timeout of 1.9 ms, the CANH and CANL output drivers are disabled to prevent data corruption, though the receiver continues to operate.

Is the RXD output compatible with 3.3V microcontrollers?

The RXD output is driven to VDD (typically 5V). Therefore, a 3.3V microcontroller connected to the RXD pin must have a 5V tolerant input to handle the high-level signal correctly.