LTC2865IDE#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC2865IDE#TRPBF is a full-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc. It operates on a primary supply voltage (VCC) ranging from 3V to 5.5V and features an independent logic interface supply pin (VL) supporting 1.65V to 5.5V for flexible digital interfacing. The device supports data rates up to 20Mbps or a low EMI mode at 250kbps, selectable via the SLO pin. It provides ±60V fault protection on transmission lines and ±15kV ESD protection on interface pins. The component is housed in a 12-lead DFN package with an exposed pad and is rated for an operating temperature range of -40°C to +85°C.

Drivers, Receivers, Transceivers Feature Summary

• Features ±60V overvoltage fault protection on data lines during all operational modes, including power-down.
• Includes an independent VL pin allowing 1.65V to 5.5V logic supply for flexible digital interface compatibility.
• Offers logic-selectable low EMI 250kbps slew-rate limited mode alongside standard 20Mbps high-speed operation.
• Provides extended common mode input range of ±25V with guaranteed failsafe receiver operation under floating or shorted conditions.

Drivers, Receivers, Transceivers Applications

• Supervisory Control and Data Acquisition (SCADA) systems
• Industrial control and instrumentation networks
• Automotive and transportation electronics
• Building automation, security systems, and HVAC controls

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm that the IDE designation corresponds to the industrial temperature grade (-40°C to +85°C). Ensure the 12-lead DFN package dimensions match the PCB footprint requirements. Cross-reference the manufacturer's latest datasheet for any updates to electrical characteristics or pin configurations before finalizing procurement specifications.

Drivers, Receivers, Transceivers Selection Notes

Select the LTC2865IDE#TRPBF when a full-duplex architecture is required with an independent logic supply voltage below the main VCC level. This part is suitable for environments requiring robust ±60V line fault tolerance and extended ±25V common mode ranges. Consider the low EMI 250kbps mode if signal integrity is critical in electrically noisy industrial settings. Verify that the 12-lead DFN package fits within the available board space constraints.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC2862/LTC2863/LTC2864/LTC2865 family of ruggedized transceivers. Unlike the LTC2864, which shares the same package but lacks the VL pin, the LTC2865 specifically includes the dedicated logic supply pin for lower voltage digital interfaces. It is pin-compatible with legacy parts like the LT1785 and LT1791 in certain packages, facilitating upgrades to higher fault protection standards.

Drivers, Receivers, Transceivers Replacement Considerations

The LTC2864IDE#TRPBF serves as a direct substitute if the independent VL pin is not utilized in the design, though it lacks the separate logic supply capability. For half-duplex applications, the LTC2862 series may be considered, provided the duplex requirement changes. Verify pin compatibility and thermal performance when swapping between these family members.

Drivers, Receivers, Transceivers FAQ

How is the low EMI mode activated on the LTC2865?

The low EMI 250kbps mode is activated by pulling the SLO (Slew Rate Limit Output) pin low. When the SLO pin is high, the device operates at its maximum data rate of 20Mbps.

What is the function of the VL pin on the LTC2865?

The VL pin provides an independent logic interface power supply ranging from 1.65V to 5.5V. This allows the logic inputs (DI, DE, RE) and receiver output (RO) to operate at logic levels different from the main VCC supply.

Does the LTC2865 support failsafe operation with unpowered inputs?

Yes, the device guarantees failsafe receiver operation. If the differential input voltage is less than 200mV and the condition persists for more than approximately 3µs, the receiver output is forced to a logic high state, even if the inputs are floating or shorted.