LTC2855HDE

Drivers, Receivers, Transceivers Overview

The LTC2855HDE is a full-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 high input impedance supporting up to 256 nodes per bus. 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 ±15kV HBM on interface pins. It operates within a temperature range of -40°C to +125°C (H-Grade) and is housed in a 12-lead 4mm x 3mm DFN package.

Drivers, Receivers, Transceivers Feature Summary

• Integrated switchable 120Ω termination resistor controlled by the TE pin
• High input impedance receiver supporting up to 256 nodes on the bus
• Guaranteed failsafe operation ensuring high output during idle conditions
• Current-limited drivers with thermal shutdown for fault protection

Drivers, Receivers, Transceivers Applications

• Level translator applications
• Backplane transceiver systems
• Industrial control networks

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against official documentation to confirm lead-free finish and tape-and-reel packaging specifications. Confirm that the H-grade designation matches the required extended operating temperature range for the target environment. Ensure the DE package type aligns with the PCB footprint requirements.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a full-duplex architecture is required alongside integrated line termination to simplify network design. The H-grade variant is necessary for environments exceeding standard industrial temperatures. Verify that the 3.3V supply voltage is compatible with the system power rails before implementation.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2854/LTC2855 family of low-power RS-485/RS-422 transceivers. While the LTC2854 provides half-duplex functionality, the LTC2855 offers full-duplex communication capabilities. Both share identical electrical characteristics regarding speed, protection, and termination features.

Drivers, Receivers, Transceivers Replacement Considerations

The LTC2854 is pin-compatible but provides half-duplex operation instead of full-duplex. Other Analog Devices RS-485 transceivers may require external termination resistors and lack the specific integrated switching logic found in this series.