LTC2854HDD

Drivers, Receivers, Transceivers Overview

The LTC2854HDD is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc. It operates on a single 3.0V to 3.6V supply voltage and supports data rates up to 20Mbps. The device features an integrated logic-selectable 120Ω termination resistor, one-eighth unit load receiver input resistance supporting up to 256 nodes, and guaranteed failsafe operation. It includes current-limited drivers, thermal shutdown protection, and enhanced ESD protection rated at ±25kV (HBM). The component is housed in a 10-lead 3mm × 3mm DFN package with an exposed thermal pad.

Drivers, Receivers, Transceivers Feature Summary

• Integrated switchable 120Ω termination resistor controlled via the TE pin
• High input impedance allowing connection of up to 256 nodes per bus
• Guaranteed failsafe receiver output state during floating or shorted inputs
• Enhanced ESD protection up to ±25kV Human Body Model without latchup

Drivers, Receivers, Transceivers Applications

• Industrial communication networks requiring high node density
• Backplane transceiver interfaces
• Level translation between different voltage domains
• Bus systems operating in environments with significant electrical noise

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific temperature grade suffix when ordering, as the base model number does not indicate the operating range. Confirm the package type matches the design footprint requirements. Ensure that the selected variant meets the environmental specifications for the intended application environment.

Drivers, Receivers, Transceivers Selection Notes

Select the LTC2854HDD for applications requiring half-duplex communication with integrated line termination. Verify that the system power supply remains within the 3.0V to 3.6V range. Consider the H-grade temperature rating if operation above 85°C is required. Ensure the PCB layout accommodates the DFN package dimensions and thermal pad connections.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC2854/LTC2855 family of low-power transceivers. The LTC2854 variant provides half-duplex functionality, whereas the LTC2855 offers full-duplex operation. Both share similar electrical characteristics, including the integrated termination and high ESD ratings, but differ in driver output configuration and package options.

Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes include other parts from the LTC2854 series with different temperature grades or packaging, such as LTC2854CDD or LTC2854IDD. Cross-family replacements must be evaluated for compatibility with the 3.3V supply, 20Mbps data rate, and half-duplex interface requirements.