LTC2857HDD-2#PBF

Drivers, Receivers, Transceivers Overview

The LTC2857HDD-2#PBF 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 for low EMI applications. The device features a one-eighth unit load receiver input resistance exceeding 96kΩ, supporting up to 256 nodes per bus. Enhanced ESD protection withstands ±15kV (human body model) without latchup. It includes current-limited drivers and thermal shutdown for fault protection. The H-grade variant operates from -40°C to +125°C. It is housed in an 8-lead 3mm × 3mm DFN package.

Drivers, Receivers, Transceivers Feature Summary

• Full-duplex operation with independent driver and receiver channels
• Slew-rate limited output for reduced electromagnetic interference emissions
• High input impedance receiver supporting extensive node counts
• Robust protection against electrostatic discharge and short circuits

Drivers, Receivers, Transceivers Applications

• Low EMI industrial communication networks
• Backplane transceivers requiring high noise immunity
• Level translation between different voltage domains
• Multi-drop serial bus systems with high node density

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix indicates the H-grade temperature range and the DD package type. Confirm the #PBF designation ensures lead-free compliance. Check that the ordering code matches the required full-duplex configuration with slew-rate limiting capabilities before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this component when full-duplex communication is required alongside strict EMI constraints. The 250kbps limit distinguishes it from the 20Mbps variants. Ensure the application requires the extended -40°C to +125°C operating range provided by the H-grade specification for reliable performance in harsh environments.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC285x family of rugged RS485/RS422 transceivers. It shares core protection features with half-duplex counterparts but provides simultaneous transmit and receive paths. The family emphasizes high common-mode rejection and failsafe operation under various bus fault conditions.

Drivers, Receivers, Transceivers Replacement Considerations

LTC2857CDD-2#PBF offers identical electrical specifications but operates within the commercial temperature range of 0°C to 70°C instead of the automotive grade range.