LTC2855HGN#PBF

Drivers, Receivers, Transceivers Overview

The LTC2855HGN#PBF is a full-duplex RS485/RS422 transceiver operating on a 3.3V supply with a maximum data rate of 20Mbps. It features an integrated, logic-selectable 120Ω termination resistor and supports up to 256 nodes per bus due to its one-eighth unit load input impedance. The device includes enhanced ESD protection capable of withstanding ±15kV on interface pins without latchup or damage. It guarantees failsafe receiver operation over the entire common mode range and incorporates current-limited drivers with thermal shutdown for fault protection.

Drivers, Receivers, Transceivers Feature Summary

• Integrated switchable 120Ω termination resistor controlled by logic input
• Full-duplex architecture with independent driver and receiver channels
• Guaranteed failsafe receiver output under floating or shorted input conditions
• High input impedance supporting extensive node density on communication buses

Drivers, Receivers, Transceivers Applications

• Supervisory Control and Data Acquisition (SCADA) systems
• Industrial control and instrumentation networks
• Building automation and security systems
• HVAC control interfaces

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific H-grade temperature rating (-40°C to +125°C) against application requirements. Confirm the SSOP-16 package dimensions match the PCB footprint. Ensure the 3.3V supply voltage aligns with system power rails before ordering.

Drivers, Receivers, Transceivers Selection Notes

Select this component when full-duplex communication is required alongside integrated line termination. Compare against half-duplex alternatives if bidirectional single-wire transmission suffices. Verify that the 20Mbps speed meets network timing constraints and that the 3.3V logic levels are compatible with host controllers.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2854/LTC2855 family of low-power RS485/RS422 transceivers. The LTC2855 variant specifically provides full-duplex capability, distinguishing it from the half-duplex LTC2854. Both share identical pinouts and core features like integrated termination and failsafe operation.

Drivers, Receivers, Transceivers Replacement Considerations

Publicly confirmed pin-compatible substitutes include the LTC2862A series and the LT1785. Verify electrical specifications and package compatibility before substitution.