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    Parts    SN65HVD179DR
SN65HVD179DR

TISN65HVD179DR

Texas Instruments
1/1 Transceiver Full RS422, RS485 8-SOIC
Active165,005 in stock
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Overview

The SN65HVD179DR is a high-speed, full-duplex RS-485 and RS-422 transceiver designed for robust industrial communication. It supports data rates up to 25Mbps and is specifically optimized for INTERBUS applications requiring balanced receiver thresholds and high noise immunity. With 1/2 unit-load capability, it allows up to 64 nodes to be connected on a single bus while providing integrated 15kV ESD protection.

Why Choose This Part

This transceiver features high data rate support of 25Mbps and a wide bus-fault protection range from -7V to 12V. Its 1/2 unit-load design doubles the standard node capacity on a single segment compared to standard RS-485 devices. Furthermore, the integrated 15kV HBM ESD protection and glitch-free power-up/down characteristics enhance system reliability in harsh industrial settings.

Applications

INTERBUS Systems
Optimized for the high-speed requirements and specific signaling standards of INTERBUS industrial fieldbus networks.
Factory Automation
Used in PLC-to-PLC communication and motor control feedback loops where full-duplex, high-speed data transmission is required.
Grid Infrastructure
Ideal for smart meters and substation automation where reliable differential signaling is needed across long cable runs.
Building Automation
Serves as a communication interface for HVAC controllers and security panels in electrically noisy environments.

Key Specifications

Type Transceiver
Duplex Full
Protocol RS422, RS485
Data Rate 25Mbps
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Voltage - Supply 4.5V ~ 5.5V
Receiver Hysteresis 50 mV
Operating Temperature -40degC ~ 85degC
Supplier Device Package 8-SOIC
Number of Drivers/Receivers 1/1

Getting Started

To evaluate this transceiver, design a PCB with 0.1uF decoupling capacitors placed close to the VCC pin and ensure proper 120-ohm termination resistors are used at the bus ends. For rapid prototyping, use an 8-pin SOIC to DIP adapter to interface with standard breadboards or microcontroller development kits. Always verify the 5V supply rail is stable as the device is rated for a 4.5V to 5.5V operating range.