LTC2877HMSE#PBF

Drivers, Receivers, Transceivers Overview

The LTC2877HMSE#PBF is a rugged PROFIBUS and RS485 transceiver designed for harsh industrial environments. It features ±60V fault tolerance on bus pins and ±52kV ESD protection on interface pins. The device supports data rates up to 20Mbps with a primary supply voltage range of 3.0V to 5.5V. A distinct logic supply pin (VL) allows flexible digital interfacing from 1.65V to VCC. It operates within an extended common-mode input range of ±25V and includes full failsafe operation for open, shorted, or terminated conditions. The component is housed in a 10-lead MSOP package.

Drivers, Receivers, Transceivers Feature Summary

• Exceptional robustness with ±60V bus fault tolerance and high ESD protection levels suitable for harsh environments.
• Flexible digital interfacing enabled by a separate low-voltage logic supply pin supporting 1.65V to 5.5V operation.
• Superior noise tolerance provided by fully balanced differential receiver thresholds with integrated hysteresis.
• Guaranteed failsafe operation ensures reliable data communication during open, shorted, or terminated bus conditions.

Drivers, Receivers, Transceivers Applications

• PROFIBUS-DP compliant master and slave networks
• Industrial communication systems requiring high noise immunity
• RS485 and RS422 multi-node communication links
• Low voltage differential signaling applications

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and RoHS compliance when sourcing. Confirm the HMSE designation corresponds to the high-temperature grade (-40°C to 125°C) and the MSOP-10 package type. Ensure the logic supply pin VL is properly decoupled according to datasheet recommendations for stable operation across the specified voltage range.

Drivers, Receivers, Transceivers Selection Notes

Select this model over the LTC2876 variant specifically when independent control of the logic supply voltage is required for compatibility with lower voltage microcontrollers. Verify that the application demands the extended -40°C to 125°C operating temperature range associated with the H-grade suffix. Ensure the system design accommodates the 10-lead MSOP footprint and exposed pad thermal requirements.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC2876/LTC2877 family of rugged transceivers manufactured by Analog Devices Inc. The series is engineered to meet IEC 61158-2 Type 3 specifications for medium attachment units. The family differentiates between models with and without a dedicated logic supply pin, providing options for varying interface voltage requirements in industrial networking equipment.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2876HMSE#PBF serves as a direct functional substitute if the logic supply pin (VL) is not utilized in the circuit design. Both components share identical electrical characteristics for the primary supply and bus interface. Verify that the PCB layout supports the 10-lead package of the LTC2877 if replacing the 8-lead LTC2876, or adapt the schematic to leave the VL pin unconnected if using the LTC2876.

Drivers, Receivers, Transceivers FAQ

What is the maximum data rate supported by the LTC2877?

The device supports a maximum baud rate of 20Mbps, which covers all standard PROFIBUS data rates up to 12Mbps.

How does the logic supply pin (VL) differ from the main supply (VCC)?

The VL pin powers the logic inputs and outputs independently, allowing operation from 1.65V to VCC, whereas VCC powers the driver and receiver stages and typically operates between 3.0V and 5.5V.

What level of ESD protection is provided on the bus pins?

The interface pins (PA and PB) are protected against electrostatic discharge up to ±52kV using the Human Body Model.