LTC2857CDD-2#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC2857CDD-2#TRPBF is a low-power, full-duplex RS485/RS422 transceiver operating on a 5V supply. It supports a maximum data rate of 250kbps with slew-rate limiting to minimize EMI emissions. The receiver features a one-eighth unit load (input resistance >96kΩ), enabling up to 256 nodes per bus for C and I-grade devices. Enhanced ESD protection withstands ±15kV HBM without latchup. The device includes current-limited drivers, thermal shutdown, and guaranteed failsafe operation ensuring a high output state during floating or shorted inputs.

Drivers, Receivers, Transceivers Feature Summary

• Slew-rate limited driver outputs reduce high-frequency EMI emissions for compliance in sensitive environments.
• High input impedance receiver design allows connection of up to 256 nodes on a single bus segment.
• Integrated thermal shutdown and current limiting protect against excessive power dissipation from bus contention.
• Failsafe circuitry guarantees a logic-high receiver output when differential inputs are unconnected or shorted.

Drivers, Receivers, Transceivers Applications

• Low EMI industrial communication networks requiring RS485/RS422 compatibility
• Backplane transceivers where signal integrity and noise reduction are critical
• Level translation interfaces between microcontrollers and serial buses

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging and lead-free construction. Confirm the DD package code corresponds to the 8-lead DFN form factor. Ensure the -2 designation matches the required 250kbps slew-rate limited speed grade rather than the standard 20Mbps variant.

Drivers, Receivers, Transceivers Selection Notes

Select this component when low electromagnetic interference is a priority over high-speed throughput. The 250kbps limit distinguishes it from the -1 variants. Verify that the full-duplex architecture fits the system topology, as separate transmit and receive lines are required compared to half-duplex options.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC285x family of low-power transceivers. It shares the same physical footprint and pinout structure as the LTC2856 and LTC2858 series but differs in duplex capability and speed grading. The family emphasizes robust protection features and high node count support for industrial applications.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2857CDD-2#PBF offers the same electrical specifications in tube packaging instead of tape and reel.

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 for C and I-grade devices.

How does the device handle floating or shorted inputs?

It features a failsafe mechanism that guarantees a high output state under conditions of floating or shorted inputs.

What is the ESD protection rating for the interface pins?

The device provides enhanced ESD protection capable of withstanding ±15kV (human body model) without latchup or damage.