LTC2856CDD-1#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC2856CDD-1#TRPBF is a low-power, half-duplex RS485/RS422 transceiver manufactured by Analog Devices Inc. It operates on a single 5V supply with a maximum data rate of 20Mbps and supports up to 256 nodes per bus due to its one-eighth unit load receiver input impedance. The device features ±15kV ESD protection, current-limited drivers, thermal shutdown, and guaranteed failsafe operation. It is housed in an 8-lead 3mm x 3mm DFN package and is rated for commercial operating temperatures from 0°C to 70°C.

Drivers, Receivers, Transceivers Feature Summary

• Enhanced ESD protection withstands ±15kV human body model without latchup or damage.
• High input impedance allows connection of up to 256 nodes on the bus line.
• Integrated thermal shutdown and current limiting protect against excessive power dissipation.
• Guaranteed failsafe receiver output ensures a high logic state during floating or shorted input conditions.

Drivers, Receivers, Transceivers Applications

• Low EMI industrial communication networks
• Backplane transceiver interfaces
• Level translation between different voltage domains

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm that the C-grade temperature rating aligns with your operational environment requirements. Ensure compatibility with standard RS485/RS422 signaling protocols before finalizing procurement decisions.

Drivers, Receivers, Transceivers Selection Notes

Select this part for applications requiring half-duplex communication at speeds up to 20Mbps. It is suitable for systems needing robust ESD protection and high node density. Consider the H-grade variant if operation above 70°C is required. Verify that the 8-lead DFN package fits within the available PCB footprint constraints.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC2856 series of low-power RS485/RS422 transceivers. It shares functional similarities with the LTC2857 and LTC2858 families but is distinct as a half-duplex device. The series emphasizes low power consumption and high noise immunity for reliable industrial data transmission.

Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes include other parts within the LTC2856 family such as the LTC2856CMS8-1#PBF for MSOP packaging. Cross-reference with similar half-duplex RS485 transceivers from other manufacturers only if pinout and electrical specifications match exactly.

Drivers, Receivers, Transceivers FAQ

What is the maximum number of nodes supported by this transceiver?

The receiver has a one-eighth unit load, supporting up to 256 nodes per bus.

Does the device provide protection against electrostatic discharge?

Yes, it offers enhanced ESD protection capable of withstanding ±15kV (human body model) on the interface pins.

How does the failsafe feature operate?

It guarantees a high output state when the inputs are floating, shorted, or terminated but not driven for more than approximately 3µs.