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SN75179B

TISN75179B

Texas Instruments
A classic RS-485 transceiver family used in many industrial designs
Active105,065 in stock

Overview

The SN75179B is a differential driver and receiver pair designed for full-duplex communication on RS-422 and RS-485 networks. It operates from a 5V supply and combines a single driver and receiver in a compact 8-pin package, making it a staple for point-to-point and multi-point industrial data links.

Why Choose This Part

This transceiver features driver thermal-shutdown protection and 50 mV of receiver input hysteresis to improve noise immunity. It supports a wide common-mode input voltage range of -7V to 12V, ensuring reliable operation despite ground potential differences between nodes.

Applications

Full-Duplex Industrial Networks
Enables simultaneous bidirectional data transmission over long distances in RS-422 or RS-485 configurations.
Motor Control Feedback
Transmitting high-speed encoder data from industrial motors to a central controller in noisy environments.
Factory Automation
Connecting PLCs and industrial sensors across factory floors using differential signaling to reject common-mode noise.

Key Specifications

Type Transceiver
Duplex Full
Protocol RS422, RS485
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Voltage - Supply 4.75V ~ 5.25V
Receiver Hysteresis 50 mV
Operating Temperature 0degC ~ 70degC
Supplier Device Package 8-SOIC
Number of Drivers/Receivers 1/1

Getting Started

For rapid prototyping, mount the SOIC-8 or PDIP-8 package onto a breadboard adapter and provide a stable 4.75V to 5.25V supply. Ensure 120-ohm termination resistors are placed at the physical ends of the differential bus to prevent signal reflections.

Also Consider

MAX485 Maxim Integrated / Analog Devices - A widely used half-duplex alternative for applications where simultaneous two-way communication is not required.
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