LTC2855CDE#PBF

Drivers, Receivers, Transceivers Overview

The LTC2855CDE#PBF is a full-duplex RS-422/RS-485 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 current-limited drivers, thermal shutdown protection, and failsafe receiver operation that guarantees a high output state during floating or shorted inputs. It withstands ±15kV HBM ESD on interface pins without latchup.

Drivers, Receivers, Transceivers Feature Summary

• Integrated switchable 120Ω termination resistor controlled by the TE pin
• Full-duplex architecture with separate driver and receiver channels
• Guaranteed failsafe receiver operation across the entire common mode range
• High input impedance supporting up to 256 nodes on the bus

Drivers, Receivers, Transceivers Applications

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

Drivers, Receivers, Transceivers Procurement Notes

Verify the component marking code '2855' on the package surface to confirm authenticity. Ensure the ordering suffix matches the required temperature grade and packaging format. Cross-reference the manufacturer part number against official Analog Devices documentation to validate specifications before integration into production designs.

Drivers, Receivers, Transceivers Selection Notes

Select this model for applications requiring full-duplex communication at speeds up to 20Mbps. The C-grade designation indicates suitability for commercial temperature ranges. Consider the DFN-12 package for space-constrained layouts while ensuring adequate thermal management via the exposed pad connection.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC2854/LTC2855 family of low-power RS-485/RS-422 transceivers. While the LTC2854 provides half-duplex functionality in a smaller footprint, the LTC2855 offers simultaneous transmit and receive capabilities. Both variants share identical electrical characteristics regarding power consumption and protection features.

Drivers, Receivers, Transceivers Replacement Considerations

The LTC2855 is pin-compatible with the LT1785. Designers replacing legacy components should verify that the substitute supports the required 20Mbps data rate and 3.3V supply voltage. Confirm that the replacement package maintains the same thermal dissipation requirements.