LTC2873HUFD#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC2873HUFD#TRPBF is a single-bus RS485/RS232 multiprotocol transceiver from Analog Devices, housed in a 24-lead 4mm × 5mm QFN package. It operates on a single 3V to 5.5V supply with a logic interface range of 1.7V to 5.5V. The device supports up to 20Mbps for RS485 and selectable slew rates for RS232 (1Mbps or 250kbps). An integrated DC/DC boost converter generates ±6.3V to ±7.0V supplies using a 10µH inductor. It features software-selectable termination resistors (120Ω for RS485, 5kΩ for RS232), logic loopback mode, and high ESD protection of ±26kV HBM on bus pins. The H-grade variant ensures operation across an extended temperature range of –40°C to 125°C.

Drivers, Receivers, Transceivers Feature Summary

• Pin-configurable multiprotocol support allowing the same two bus pins to function as either half-duplex RS485 or RS232 transceivers via the 485/232 control input.
• Integrated DC/DC boost converter eliminates external dual-supply requirements by generating necessary voltage rails for RS232 levels using minimal passive components.
• Software-selectable automatic termination resistors remove the need for external resistors and control relays during interface reconfiguration.
• High electromagnetic compatibility with ±26kV HBM ESD ratings on interface pins and full failsafe receiver operation to prevent UART lockup.

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 #TRPBF confirms tape and reel packaging when sourcing. Confirm the HUFD designation corresponds to the H-grade industrial temperature rating of –40°C to 125°C. Ensure the 24-lead QFN footprint matches the PCB layout constraints. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and supply chain integrity.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a single bus interface must dynamically switch between RS485 and RS232 protocols without hardware changes. The integrated termination and boost converter simplify design compared to discrete solutions. Verify that the required data rate does not exceed 20Mbps for RS485 or 1Mbps for RS232 fast mode. Ensure the system power supply remains within the 3V to 5.5V operating range for optimal performance.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2873 family of multiprotocol transceivers. The HUFD suffix indicates the H-grade temperature range and the UFD plastic QFN package. Other variants include C-grade (commercial) and I-grade (industrial) options with similar pinouts but different thermal specifications. The TRPBF suffix denotes the standard tape and reel packaging format for automated assembly.

Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes within the same family include LTC2873IUFD#TRPBF for lower temperature ranges and LTC2873CUFD#TRPBF for commercial applications. These share identical pinouts and functionality but differ in operating temperature limits. No cross-family replacements are confirmed in public documentation.