LTC2854CDD#PBF

Drivers, Receivers, Transceivers Overview

The LTC2854CDD#PBF is a half-duplex RS-485/RS-422 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 receiver input resistance. The device includes failsafe circuitry guaranteeing a high output state during floating or shorted inputs, current-limited drivers, and thermal shutdown protection. ESD protection withstands ±25kV (HBM) without latchup. It operates within a temperature range of 0°C to 70°C and is housed in a 10-lead 3mm × 3mm DFN package.

Drivers, Receivers, Transceivers Feature Summary

• Integrated switchable 120Ω termination resistor controlled by the TE pin
• High input impedance supporting up to 256 nodes on the bus
• Guaranteed failsafe receiver operation under open or shorted input conditions
• Enhanced ESD protection rated at ±25kV human body model

Drivers, Receivers, Transceivers Applications

• Level translator applications
• Backplane transceiver systems
• Low power RS485/RS422 networks

Drivers, Receivers, Transceivers Procurement Notes

Verify the component against official Analog Devices documentation to confirm specifications and authenticity. Ensure the ordering suffix matches the required lead-free finish and tape-and-reel packaging format. Cross-reference the part marking LCQG with the specific package type for accurate identification.

Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring integrated line termination to simplify network configuration. The half-duplex architecture suits bidirectional communication needs. Verify that the 3.3V supply voltage aligns with system requirements and that the C-grade temperature range meets environmental constraints.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2854/LTC2855 family of low-power transceivers. The LTC2854 variant provides half-duplex communication, whereas the LTC2855 offers full-duplex capability. Both share similar features like integrated termination and high node capacity, differing primarily in duplex mode and package options.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2854IDD#PBF: Same function with extended industrial temperature range (-40°C to 85°C).

Drivers, Receivers, Transceivers FAQ

How does the integrated termination resistor function?

The internal 120Ω termination resistor connects between pins A and B when the TE pin is driven high, allowing logic-controlled line termination.

What is the failsafe behavior of the receiver?

The receiver guarantees a logic-high output state when inputs are floating, shorted, or terminated without a driving signal across the entire common mode range.

What is the maximum ESD rating for the interface pins?

The LTC2854 withstands ±25kV via the Human Body Model on the A and B pins without damage or latchup.