THVD1505 Bus-Polarity Correcting RS-485 Transceiver With IEC-ESD Protection - Datasheet

Q: How quickly does the THVD1505 correct bus polarity after bus idle?

The device detects and corrects bus polarity within the first 45 ms of bus idling after hot plug-in.

Q: What ESD and transient protection levels does the THVD1505 provide?

It supports ±16-kV HBM ESD, ±8-kV IEC 61000-4-2 contact discharge, ±8-kV IEC 61000-4-2 air-gap discharge, and ±2-kV IEC 61000-4-4 fast transient burst.

Q: What communication mode and data rate are supported?

The THVD1505 is a half-duplex RS-422/RS-485 transceiver with data rates up to 1 Mbps.

Nov 2, 2026

Uploaded by Damian

THVD1505 is a low-power, half-duplex RS-485 transceiver featuring automatic bus-polarity correction and robust IEC/ESD protection. It corrects bus polarity within the first 45 ms after bus idle, supports 4.5-V to 5.5-V supply operation, and can work with or without fail-safe biasing. The device provides ±16-kV HBM ESD, ±8-kV IEC 61000-4-2 contact and air-gap discharge, and ±2-kV IEC 61000-4-4 fast transient burst protection, with open/short/idle fail-safe and 120 mV receiver hysteresis for noise rejection.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages32

Reading Time1 h 21 min

AccessFree to download

Features

Applications

Description

Revision History

Pin Configuration and Functions

Specifications

Absolute Maximum Ratings

ESD Ratings

Recommended Operating Conditions

Thermal Information

Electrical Characteristics

Power Dissipation Characteristics

Switching Characteristics

Typical Characteristics

Parameter Measurement Information

Driver

Receiver

Detailed Description

Overview

Functional Block Diagram

Feature Description

Device Functional Modes

Application and Implementation

Application Information

Typical Application

Power Supply Recommendations

Layout

Layout Guidelines

Layout Example

Device and Documentation Support

Device Support

Receiving Notification of Documentation Updates

Community Resources

Trademarks

Electrostatic Discharge Caution

Glossary

Mechanical, Packaging, and Orderable Information

THVD1505 Bus-Polarity Correcting RS-485 Transceiver With IEC-ESD Protection 1 Features • Meets or exceeds the requirements of the TIA/EIA-485A standard and the State Grid Corporation of China (SGCC) Part 11 Serial Communication Protocol RS-485 standard • 4.5-V to 5.5-V supply voltage • Half-duplex RS-422 / RS-485 • Bus polarity correction within 45 ms • Works with or without fail-safe biasing resistors • Data rate: up to 1 Mbps • Bus I/O protection: – ± 16-kV HBM ESD – ±8-kV IEC 61000-4-2 contact discharge – ±8-kV IEC 61000-4-2 air-gap discharge – ±2-kV IEC 61000-4-4 fast transient burst • Open, short, and idle bus fail-safe • Large receiver hysteresis for noise rejection: 120 mV • Up to 256 nodes on a bus (1/8 unit load) • Extended ambient temperature range: -40°C to 125°C • Low power consumption – Standby supply current: < 1 µA – Operational supply current: < 1.1 mA • Glitch-free power-up / down for hot plug-incapability 2 Applications • Electricity meters • HVAC systems • Inverters • Video surveillance 3 Description The THVD1505 is a low-power RS-485 transceiver with automatic bus-polarity correction and transient protection. Upon hot plug-in, the device detects and corrects the bus polarity within the first 45 ms of busidling. The bus pins are robust to electrostatic discharge (ESD) events, with high levels of protection to human-body model (HBM), IEC 61000-4-2 contact discharge and air-gap discharge specifications. The device combines a differential driver and a differential receiver, which operate together from a single 5-V power supply. The driver differential outputs and the receiver differential inputs are connected internally to form a bus port suitable for half-duplex (two-wire bus) communication. The device features a wide common-mode voltage range making the device suitable for multi-point applications over long cable runs. The THVD1505 is available inan SOIC-8 package, and is characterized for free-air temperatures from –40°C to 125°C. Device Information(1) | PART NUMBER | PACKAGE | BODY SIZE (NOM) | | --- | --- | --- | | THVD1505 | SOIC (8) | 4.90 mm × 3.91 mm | (1) For all available packages, see the orderable addendum atthe end of the datasheet. Typical Network Application With Polarity Correction (POLCOR) R RE DE D Master THVD1500 Cross-wire R RE DE D R RE DE D R RE DE D Slave THVD1505 Slave THVD1505 Copyright © 2018, Texas Instruments Incorporated An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. Table of Contents 1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Pin Configuration and Functions ......................... 3 6 Specifications......................................................... 3 6.1 Absolute Maximum Ratings ...................................... 3 6.2 ESD Ratings.............................................................. 3 6.3 ESD Ratings [IEC] .................................................... 4 6.4 Recommended Operating Conditions ....................... 4 6.5 Thermal Information .................................................. 4 6.6 Electrical Characteristics ........................................... 5 6.7 Power Dissipation Characteristics ............................ 6 6.8 Switching Characteristics .......................................... 6 6.9 Typical Characteristics .............................................. 7 7 Parameter Measurement Information .................. 8 7.1 Driver........................................................

FAQs

How quickly does the THVD1505 correct bus polarity after bus idle?

The device detects and corrects bus polarity within the first 45 ms of bus idling after hot plug-in.

What ESD and transient protection levels does the THVD1505 provide?

It supports ±16-kV HBM ESD, ±8-kV IEC 61000-4-2 contact discharge, ±8-kV IEC 61000-4-2 air-gap discharge, and ±2-kV IEC 61000-4-4 fast transient burst.

What communication mode and data rate are supported?

The THVD1505 is a half-duplex RS-422/RS-485 transceiver with data rates up to 1 Mbps.

Nov 2, 2026

Uploaded by Damian