LTC2873HUFD#PBF

Drivers, Receivers, Transceivers Overview

The LTC2873HUFD#PBF is a single-bus RS485/RS232 multiprotocol transceiver manufactured by Analog Devices Inc. It operates on a single 3V to 5.5V supply voltage and features an integrated DC/DC boost converter for RS232 levels. The device supports up to 20Mbps data rates in RS485 mode and offers selectable slew-controlled RS232 operation at 1Mbps or 250kbps. It includes software-selectable termination resistors, logic loopback mode, and high ESD protection of ±26kV HBM. The component is housed in a 24-lead 4mm × 5mm QFN package and is rated for an operating temperature range of –40°C to 125°C.

Drivers, Receivers, Transceivers Feature Summary

• Pin-configurable multiprotocol support for RS232, RS485, and RS422 using a single two-pin bus interface.
• Integrated DC/DC boost converter eliminates the need for multiple external power supplies.
• Software-selectable automatic termination resistors for both RS485 (120Ω) and RS232 (5kΩ).
• High electromagnetic compatibility with ±26kV HBM ESD protection on interface pins.

Drivers, Receivers, Transceivers Applications

• Industrial sensors and actuators
• Alarm systems
• Traffic control and monitoring
• Highway signs and jumbo displays

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix HUFD corresponds to the industrial temperature grade (-40°C to 125°C) and the 24-lead QFN package configuration. Confirm that the #PBF designation indicates lead-free finish compliance. Ensure the procurement channel provides valid documentation matching the REV B datasheet specifications for this exact part number.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a single bus pin pair must switch between RS232 and RS485 protocols without external relays. It is suitable for designs requiring high ESD immunity and integrated termination. Consider the thermal performance of the exposed pad in the QFN package for the extended temperature range. Verify logic supply voltage compatibility within the 1.7V to 5.5V range.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2873 family of multiprotocol transceivers from Analog Devices. The HUFD suffix specifically denotes the H-grade variant, which extends the operating temperature range to 125°C compared to the C-grade (0°C to 70°C) and I-grade (-40°C to 85°C) options. All variants share the same 24-lead QFN footprint and functional pinout.

Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes include other parts in the LTC2873 series such as LTC2873IUFD#PBF or LTC2873CUFD#PBF, provided the temperature range requirements are met. Cross-family replacements may require schematic redesign due to differences in pin configurations or internal termination resistor values.