LTC2858HMS-2#PBF

Drivers, Receivers, Transceivers Overview

The LTC2858HMS-2#PBF is a low-power, full-duplex RS485/RS422 transceiver manufactured by Analog Devices Inc. It operates on a single 5V supply and supports a maximum data rate of 250kbps with slew-rate limiting to minimize electromagnetic interference (EMI). The device features a one-eighth unit load receiver input impedance, enabling the connection of up to 256 nodes per bus. It includes enhanced ESD protection rated at ±15kV (human body model) on interface pins without latch-up or damage. The component incorporates current-limited drivers and thermal shutdown for fault protection, ensuring glitch-free driver outputs during power-up and power-down sequences.

Drivers, Receivers, Transceivers Feature Summary

• Slew-rate limited driver outputs reduce high-frequency EMI emissions and mitigate transmission line termination issues.
• High input impedance receiver allows for extensive network scalability by supporting up to 256 nodes on a single bus.
• Integrated failsafe mechanism guarantees a logic-high output state when inputs are floating, shorted, or unpowered.
• Robust protection features include ±15kV ESD tolerance, current limiting, and thermal shutdown against excessive power dissipation.

Drivers, Receivers, Transceivers Applications

• Low EMI industrial communication networks requiring compliance with TIA/EIA-485-A specifications.
• Backplane transceiver applications in systems where signal integrity and noise reduction are critical.
• Level translation interfaces between microcontrollers and RS485/RS422 buses.
• Multi-node sensor networks utilizing high-density node configurations.

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the H-grade designation corresponds to the extended operating temperature range of -40°C to +125°C. Ensure the MSOP-10 package variant matches the required footprint for PCB layout. Cross-reference the datasheet revision to confirm pinout consistency with existing designs.

Drivers, Receivers, Transceivers Selection Notes

Select this component when low electromagnetic interference is a primary design constraint due to its 250kbps slew-rate limited operation. Choose this part over the LTC2858-1 if the application requires reduced high-frequency harmonics rather than maximum speed. Verify that the full-duplex architecture with separate transmit and receive lines fits the system topology. Consider the one-eighth unit load capability if maximizing node count is necessary.

Drivers, Receivers, Transceivers Part Context

This device belongs to the LTC285x family of low-power RS485/RS422 transceivers from Analog Devices. It shares architectural similarities with the LTC2856 and LTC2857 series but is distinct as a full-duplex device with enable controls housed in a 10-lead MSOP package. The family emphasizes robust protection and low power consumption across commercial, industrial, and automotive temperature grades.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.