LTC2856HDD-1#PBF

Drivers, Receivers, Transceivers Overview

The LTC2856HDD-1#PBF is a half-duplex RS485/RS422 transceiver in an 8-lead DFN package. It supports data rates up to 20Mbps with a supply voltage range of 4.5V to 5.5V. The device features ±15kV ESD protection, current-limited drivers, and thermal shutdown. It includes a failsafe receiver guaranteeing a high output state during floating or shorted inputs. Operating temperature ranges from -40°C to +125°C for the H-grade variant.

Drivers, Receivers, Transceivers Feature Summary

• Enhanced ESD protection withstands ±15kV human body model without latchup.
• High input impedance supports up to 256 nodes on the bus.
• Guaranteed failsafe operation ensures a logic-high receiver output under fault conditions.
• Thermal shutdown and current limiting protect against excessive power dissipation.

Drivers, Receivers, Transceivers Applications

• Low power RS485/RS422 transceivers
• Level translator circuits
• Backplane transceivers

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'HDD' indicates the Automotive temperature grade (-40°C to 125°C) and 8-lead DFN package configuration. Confirm the '#PBF' designation corresponds to lead-free manufacturing standards. Ensure compatibility with the required operating voltage range of 4.5V to 5.5V before integration.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring robust fault protection and high node density. The H-grade variant is suitable for environments demanding extended temperature operation up to 125°C. Verify that the half-duplex architecture aligns with the system's communication protocol requirements.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2856 series of low-power RS485/RS422 transceivers. It shares functional similarities with the LTC2857 (full-duplex) and LTC2858 (full-duplex with enables) variants. The primary distinction lies in its half-duplex operation mode and specific package footprint.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2856CMS8-1#PBF

Drivers, Receivers, Transceivers FAQ

What is the maximum data rate supported by the LTC2856HDD-1?

The device supports a maximum data rate of 20Mbps.

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.

What is the input impedance of the receiver?

The receiver input resistance is greater than 96kΩ in C and I grades, representing a one-eighth unit load.