LTC2857HDD-1#PBF

Drivers, Receivers, Transceivers Overview

The LTC2857HDD-1#PBF is a low power, full-duplex RS485/RS422 transceiver operating on a 5V supply. It supports maximum data rates of 20Mbps or 250kbps for low EMI applications. The receiver features a one-eighth unit load, supporting up to 256 nodes per bus (C, I-Grade), and includes a failsafe feature guaranteeing a high output state under floating or shorted input conditions. Driver outputs maintain high impedance when disabled or when the supply is removed. Enhanced ESD protection withstands ±15kV HBM without latchup. Current limiting and thermal shutdown prevent excessive power dissipation during bus contention.

Drivers, Receivers, Transceivers Feature Summary

• Full-duplex operation with independent driver and receiver channels
• Enhanced ESD protection rated at ±15kV human body model
• High input impedance receiver supporting up to 256 nodes
• Integrated thermal shutdown and current-limited drivers

Drivers, Receivers, Transceivers Applications

• Low power RS485/RS422 transceivers
• Level translators
• Backplane transceivers

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging and RoHS compliance. Confirm the DD package designation corresponds to the 8-lead plastic DFN form factor. Ensure the -1 suffix matches the required 20Mbps maximum data rate specification for your design requirements.

Drivers, Receivers, Transceivers Selection Notes

Select this component for full-duplex communication needs requiring robust ESD protection and high node count support. Compare against half-duplex variants like the LTC2856 if bidirectional single-wire transmission is sufficient. Consider the slew-rate limited LTC2857-2 if minimizing electromagnetic interference emissions is a primary design constraint over raw speed.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC285x family of low power RS485/RS422 transceivers manufactured by Analog Devices. The family includes half-duplex (LTC2856) and full-duplex (LTC2857, LTC2858) options with varying enable pin configurations and data rate capabilities across commercial, industrial, and automotive temperature grades.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.