LTC2877IMSE#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC2877IMSE#TRPBF is a rugged PROFIBUS and RS485 transceiver in a 10-lead MSOP package. It features a ±60V fault-tolerant bus interface with ±52kV ESD protection on line pins. The device supports data rates up to 20Mbps and operates with a primary supply (VCC) of 3.0V to 5.5V. A distinct logic supply pin (VL) allows flexible digital interfacing from 1.65V to VCC. Electrical characteristics include a common-mode input range of ±25V, 240mV receiver hysteresis for noise tolerance, and short-circuit current limits of ±250mA.

Drivers, Receivers, Transceivers Feature Summary

• Integrated separate logic supply pin (VL) enabling low-voltage microcontroller interfacing independent of the main bus power.
• High robustness against overvoltage faults up to ±60V on bus lines with integrated thermal shutdown.
• Balanced differential receiver thresholds with 240mV hysteresis to ensure reliable data communication in noisy industrial environments.

Drivers, Receivers, Transceivers Applications

• PROFIBUS-DP master and slave nodes
• Industrial communication networks requiring high noise immunity
• RS485 and RS422 multi-drop systems

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm that the IMSE designation corresponds to the industrial temperature range and MSOP-10 package type required for the target design. Ensure compatibility with the intended PCB footprint before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this component over the LTC2876 variant specifically when a separate logic supply voltage is required to interface with low-voltage controllers. The inclusion of the VL pin distinguishes it from models lacking this feature. Verify that the 10-lead MSOP package fits the available board space constraints.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2876/LTC2877 family of rugged transceivers designed for harsh industrial environments. While functionally similar to the LTC2876, the LTC2877 includes an additional logic supply pin. This family is engineered to meet IEC 61158-2 Type 3 specifications for medium attachment units.

Drivers, Receivers, Transceivers Replacement Considerations

The LTC2876IMS8E#TRPBF serves as a functional substitute but lacks the VL pin and utilizes an 8-lead package. Direct replacement requires circuit modification to accommodate the missing logic supply pin and different physical footprint.

Drivers, Receivers, Transceivers FAQ

What is the purpose of the VL pin on the LTC2877?

The VL pin provides a separate logic supply ranging from 1.65V to VCC, allowing the digital interface to operate at lower voltages than the main VCC supply.

How does the device handle open or shorted bus conditions?

The receiver includes a failsafe mechanism that forces the output high if the bus inputs are open, shorted, or terminated without being driven for more than approximately 1.5µs.

What is the maximum differential output voltage specified for PROFIBUS compliance?

For PROFIBUS applications, the peak-to-peak differential output voltage must be between 4V and 7V under the specified PROFIBUS load conditions.