LTC2873

PRODUCTION

Single-Bus RS485/RS232 Multiprotocol Transceiver with Switchable Termination

Data Sheet (Rev. B) Product Selection Table

Part Models: 6
1ku List Price: Starting From $5.31

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Overview

One RS485 or One RS232 Transceiver
3V to 5.5V Supply Voltage
Up to 20Mbps RS485
Slew-Controlled RS232 Operation:

Selectable 1Mbps or 250kbps

Automatic Selection of Integrated RS485 (120Ω) and RS232 (5kΩ) Termination Resistors
High ESD: ±26kV HBM
Logic Loopback Mode
1.7V to 5.5V Logic Interface
Supports Up to 256 RS485 Nodes
RS485 Receiver Failsafe Eliminates UART Lockup
H-Grade Available (–40°C to 125°C)
Available in 24-Pin 4mm × 5mm QFN Package

The LTC2873 is a robust pin-configurable multiprotocol transceiver that supports RS232, RS485, and RS422 protocols while operating on a single 3V to 5.5V supply. The LTC2873 can be configured as a half-duplex RS485 transceiver or as an RS232 transceiver using the same two bus pins.

A pin-controlled integrated termination resistor allows for easy interface reconfiguration, eliminating external resistors and control relays. Loopback mode steers the driver inputs to the receiver outputs for diagnostic self-test. The RS485 receiver supports up to 256 nodes per bus, and features full failsafe operation for floating, shorted or terminated inputs.

An integrated DC/DC boost converter uses a tiny 2mm × 1.6mm inductor and one capacitor, eliminating the need for multiple supplies when driving RS232 levels.

Applications

Software Selectable RS232/RS485/RS422 Interface
Industrial Sensors and Actuators
Alarm Systems
Traffic Control and Monitoring
Highway Signs and Jumbo Displays

Part Models: 6
1ku List Price: Starting From $5.31

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC2873CUFD#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2873CUFD#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2873HUFD#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2873HUFD#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2873IUFD#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2873IUFD#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Interface Transceivers & Isolators 3
LTC2872	PRODUCTION	RS232/RS485 Dual Multiprotocol Transceiver with Integrated Termination
LTC2870	PRODUCTION	RS232/RS485 Multiprotocol Transceivers with Integrated Termination
LTC2871	PRODUCTION	RS232/RS485 Multiprotocol Transceivers with Integrated Termination

Tools & Simulations

Linduino 1

LTC2873 - DC2364A.ino

IBIS Model 1

LTC2873iufd IBIS Model

Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

Purchase Linduino

Evaluation Kits

LTC2873 Demo Board | Single Bus RS232/RS485 Multiprotocol Transceiver with Integrated Termination (Shared I/O) (DC2026 Optional)

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Product Details

Demonstration circuit 2364A showcases the LTC2873 RS232/RS485 multiprotocol transceiver with integrated termination. The DC2364A operates as a stand-alone evaluation platform or can be used as a shield with a Linduino^® or Arduino microcontroller board for quick and versatile evaluation of the LTC2873.

DC2026 is optional (not required).

Resources

DC2364A - Design Files
2/22/2016

DC2364A - Schematic
2/22/2016

DC2364A - Demo Manual
2/22/2016

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LTC2873

Overview

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 1

Video 1

Product Selector Card 1

Webcast 1