LTC2873IUFD#PBF

Drivers, Receivers, Transceivers Overview

The LTC2873IUFD#PBF is a single-bus multiprotocol transceiver supporting RS485, RS232, and RS422 protocols. It operates on a single 3V to 5.5V supply with a logic interface range of 1.7V to VCC. The device features an integrated DC/DC boost converter generating +7.0V and -6.3V rails for RS232 operation. It supports up to 20Mbps data rates in RS485 mode and offers selectable slew-controlled RS232 speeds of 1Mbps or 250kbps. High ESD protection is rated at ±26kV HBM on bus pins. The component is housed in a 24-lead 4mm × 5mm QFN package and is specified for industrial temperature ranges from –40°C to 85°C.

Drivers, Receivers, Transceivers Feature Summary

• Pin-configurable multiprotocol transceiver supporting RS232, RS485, and RS422 via a single two-pin bus interface.
• Integrated DC/DC boost converter eliminates the need for external negative voltage supplies for RS232 operation.
• Software-selectable automatic termination resistors (120Ω for RS485, 5kΩ for RS232) reduce external component count.
• Logic loopback mode enables diagnostic self-testing by routing driver inputs directly to receiver outputs.

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 against manufacturer documentation to confirm lead-free finish and tape-and-reel availability. Confirm that the IUFD suffix corresponds to the –40°C to 85°C operating temperature range required for your application environment. Ensure the 24-QFN package dimensions align with your PCB footprint design constraints before finalizing procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a single transceiver must handle both differential RS485 and single-ended RS232 signaling without changing hardware. The integrated termination and boost converter simplify designs requiring minimal external components. Verify that the 20Mbps RS485 speed and 1Mbps RS232 fast-mode capability meet the system's communication requirements.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2873 family of multiprotocol transceivers manufactured by Analog Devices Inc. The IUFD suffix indicates the industrial temperature grade (–40°C to 85°C) and the plastic QFN package type. Other variants include the C-grade (commercial) and H-grade (extended industrial) options within the same pin-compatible series.

Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes include LTC2873CUFD#PBF for commercial temperature ranges and LTC2873HUFD#PBF for extended industrial temperatures. These parts share identical pinouts and functionality but differ in specified operating temperature limits.