LTC2855CDE#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC2855CDE#TRPBF is a low-power, 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. Additional safety mechanisms include current-limited drivers, thermal shutdown, and a guaranteed failsafe receiver operation that ensures a high output state during floating or shorted input conditions.

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 specific ordering suffix #TRPBF confirms tape and reel packaging for automated assembly. Confirm the DE package designation matches the required 12-lead DFN footprint dimensions. Ensure the C-grade temperature rating aligns with the operational environment requirements before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a full-duplex configuration is required alongside integrated line termination capabilities. The one-eighth unit load specification allows for higher node density compared to standard half-unit load devices. Verify that the 3.3V supply voltage and 20Mbps data rate meet the system's electrical constraints and performance targets.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2854/LTC2855 family of low-power RS485/RS422 transceivers. While the LTC2854 provides half-duplex communication, the LTC2855 offers full-duplex operation with distinct transmit and receive paths. Both variants share similar power management features and protection mechanisms within the same product series.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2855IDE#TRPBF

Drivers, Receivers, Transceivers FAQ

How does the failsafe feature operate?

The receiver guarantees a high output state when inputs are floating, shorted, or terminated but not driven, ensuring safe idle states.

What is the function of the TE pin?

The Termination Enable (TE) pin controls the internal 120Ω resistor, connecting it between pins A and B when set high.

What is the typical supply current in receive mode?

The typical supply current in receive mode is 370µA at VCC = 3.3V.