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SN65HVD75DR

3.3V half-duplex RS-485 transceiver, 20Mbps, IEC ±12kV ESD, 200+ nodes, SOIC-8

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Manufacturer Part：

SN65HVD75DR

Package：

SOIC-8 (3.91 x 4.9 x 1.58 mm)

Brand：

Product Categories：

Integrated Circuits ICs, Interface ICs

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Description

Product Overview

The SN65HVD75DR from Texas Instruments is a 3.3 V half-duplex RS-485 transceiver with IEC ESD protection, supporting data rates up to 20 Mbps in an SOIC-8 package. It features ±12 kV IEC 61000-4-2 contact discharge protection, 80 mV receiver hysteresis for noise rejection, and low 2 μA standby current, supporting over 200 bus nodes for demanding industrial communication networks.

Key Specifications

Supply Voltage	3.3 V (nominal)
Signaling Rate	20 Mbps
Duplex	Half-duplex
IEC ESD (Contact)	±12 kV
Receiver Hysteresis	80 mV (typical)
Common-Mode Range	-7 V to +12 V
Number of Nodes	>200 (1/8 unit load)
Standby Current	< 2 μA
Operating Temperature	-40°C to +125°C

Features

IEC 61000-4-2 ESD protection: ±12 kV contact, ±4 kV fast transient burst
Large receiver hysteresis (80 mV) for superior noise rejection on long bus runs
Low unit loading allows over 200 connected nodes on a single bus
5 V tolerant logic inputs compatible with 3.3 V or 5 V controllers
Glitch-free power-up and power-down on bus inputs and outputs

Applications

Industrial automation and process control RS-485 networks
Building automation and HVAC communication buses
Motor drive and inverter communication interfaces
Utility metering and smart grid data links
Security and access control system networks

Product Introduction:SN65HVD75DR Product Introduction

The SN65HVD75DR from Texas Instruments is a robust 3.3 V half-duplex RS-485 transceiver designed for demanding industrial communication applications. The device combines a differential driver and differential receiver operating from a single 3.3 V supply, with internally connected driver outputs and receiver inputs forming a bus port for two-wire half-duplex communication. It supports data rates up to 20 Mbps with a wide common-mode voltage range of -7 V to +12 V for multi-point applications over long cable runs. The bus pins provide high-level ESD protection to ±12 kV IEC 61000-4-2 contact discharge and ±4 kV IEC 61000-4-4 fast transient burst. Receiver hysteresis of 80 mV ensures reliable data reception in noisy environments.

Working Principle:SN65HVD75DR Working Principle

The SN65HVD75DR integrates a differential driver and receiver with shared bus pins for half-duplex operation. (1) Driver Section: The driver converts single-ended TTL/CMOS logic (D input) into differential RS-485 signals (A, B) with controlled slew rate for 20 Mbps operation. The driver output is enabled by the DE pin and features short-circuit current limiting (±160 mA) and thermal shutdown at 170°C. (2) Receiver Section: The receiver detects differential signals above the threshold (VIT+ = -20 mV, VIT- = -150 mV) with 80 mV hysteresis, converting them to single-ended logic at the R output. The receiver is enabled by pulling RE low. (3) Bus Protection: Integrated ESD clamps on A and B pins protect against IEC 61000-4-2 contact discharge up to ±12 kV and HBM up to ±15 kV. Fault protection covers -13 V to +16.5 V on the bus pins. (4) Power Management: In standby mode (DE low, RE high), supply current drops below 2 μA. Active quiescent current is less than 1 mA.

Pin Description:SN65HVD75DR Pin Definition and Functions

Pin	Name	Type	Function
1	R	Output	Receiver data output
2	RE	Input	Receiver enable (active low)
3	DE	Input	Driver enable (active high)
4	D	Input	Driver data input
5	GND	Ground	Device ground
6	A	I/O	RS-485 bus non-inverting I/O
7	B	I/O	RS-485 bus inverting I/O
8	VCC	Power	3.3 V supply voltage

Application Scenarios:In which products and applications isSN65HVD75DR used

Industrial automation RS-485 networks (Modbus, Profibus) with robust ESD protection
Building automation and HVAC communication buses over long cable runs
Motor drive and inverter communication interfaces with high noise immunity
Utility metering and smart grid data links requiring 200+ node connectivity
Security and access control system networks in electrically harsh environments

Alternative Models:What chips are recommended as replacements for SN65HVD75DR

Manufacturer	Part Number	Package	Notes
Texas Instruments	SN65HVD72DR	SOIC-8	250kbps, lower speed
Texas Instruments	SN65HVD78DR	SOIC-8	50Mbps, higher speed
Analog Devices	ADM3075EARZ	SOIC-8	3.3V, 20Mbps RS-485
Maxim Integrated	MAX3485ECSA+	SOIC-8	3.3V, 10Mbps, ESD protected
Renesas	ISL3179EIBZ	SOIC-8	3.3V, 20Mbps, ±16.5kV ESD