Product details

Rating Catalog Isolation rating Basic, Reinforced Data rate (max) (Mbps) 40 Working isolation voltage (VIOWM) (Vrms) 400 Surge isolation voltage (VIOSM) (VPK) 4000 Transient isolation voltage (VIOTM) (VPK) 4242 Withstand isolation voltage (VISO) (Vrms) 2500 CMTI (min) (kV/µs) 25 Operating temperature range (°C) -40 to 85 Creepage (min) (mm) 8 Clearance (min) (mm) 8 Type RS-485
Rating Catalog Isolation rating Basic, Reinforced Data rate (max) (Mbps) 40 Working isolation voltage (VIOWM) (Vrms) 400 Surge isolation voltage (VIOSM) (VPK) 4000 Transient isolation voltage (VIOTM) (VPK) 4242 Withstand isolation voltage (VISO) (Vrms) 2500 CMTI (min) (kV/µs) 25 Operating temperature range (°C) -40 to 85 Creepage (min) (mm) 8 Clearance (min) (mm) 8 Type RS-485
SOIC (DW) 16 106.09 mm² 10.3 x 10.3
  • Meets or Exceeds the Requirements of EN 50170 and TIA/EIA-485-A
  • Signaling Rates up to 40 Mbps
  • Easy Isolated Power Design with Integrated Transformer Driver
  • Typical Efficiency > 60% (I LOAD = 100 mA) - see SLUU471
  • Differential Output exceeds 2.1 V (54-Ω Load)
  • Low Bus Capacitance 10 pF (Maximum)
  • Fail-safe Receiver for Bus Open, Short, or Idle
  • 50-kV/µs Typical Transient Immunity
  • Safety and Regulatory Approvals
    • 4242 V PK Basic Insulation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 2500 V RMS Isolation for 1 minute per UL 1577
    • CSA 60950-1 and CSA 61010-1 Standards
  • Meets or Exceeds the Requirements of EN 50170 and TIA/EIA-485-A
  • Signaling Rates up to 40 Mbps
  • Easy Isolated Power Design with Integrated Transformer Driver
  • Typical Efficiency > 60% (I LOAD = 100 mA) - see SLUU471
  • Differential Output exceeds 2.1 V (54-Ω Load)
  • Low Bus Capacitance 10 pF (Maximum)
  • Fail-safe Receiver for Bus Open, Short, or Idle
  • 50-kV/µs Typical Transient Immunity
  • Safety and Regulatory Approvals
    • 4242 V PK Basic Insulation per DIN EN IEC 60747-17 (VDE 0884-17)
    • 2500 V RMS Isolation for 1 minute per UL 1577
    • CSA 60950-1 and CSA 61010-1 Standards

The ISO1176T is an isolated differential line transceiver with integrated oscillator outputs that provide the primary voltage for an isolation transformer. The device is ideal for long transmission lines because the ground loop is broken to allow the device to operate with a much larger common-mode voltage range.

The symmetrical isolation barrier of each device is tested to provide 4242V PK of isolation per VDE for 60 seconds between the line transceiver and the logic-level interface.

The galvanically isolated differential bus transceiver is an integrated circuit designed for bi-directional data communication on multipoint bus-transmission lines. The transceiver combines a galvanically isolated differential line driver and differential input line receiver. The driver has an active-high enable with isolated enable-state output on the ISODE pin (pin 10) to facilitate direction control. The driver differential outputs and the receiver differential inputs connect internally to form a differential input/output (I/O) bus port that is designed to offer minimum loading to the bus whenever the driver is disabled or V CC2 = 0.

Any cabled I/O can be subjected to electrical noise transients from various sources. These noise transients can cause damage to the transceiver and/or near-by sensitive circuitry if they are of sufficient magnitude and duration. The ISO1176T can significantly reduce the risk of data corruption and damage to expensive control circuits.

The device is characterized for operation over the ambient temperature range of –40°C to 85°C.

The ISO1176T is an isolated differential line transceiver with integrated oscillator outputs that provide the primary voltage for an isolation transformer. The device is ideal for long transmission lines because the ground loop is broken to allow the device to operate with a much larger common-mode voltage range.

The symmetrical isolation barrier of each device is tested to provide 4242V PK of isolation per VDE for 60 seconds between the line transceiver and the logic-level interface.

The galvanically isolated differential bus transceiver is an integrated circuit designed for bi-directional data communication on multipoint bus-transmission lines. The transceiver combines a galvanically isolated differential line driver and differential input line receiver. The driver has an active-high enable with isolated enable-state output on the ISODE pin (pin 10) to facilitate direction control. The driver differential outputs and the receiver differential inputs connect internally to form a differential input/output (I/O) bus port that is designed to offer minimum loading to the bus whenever the driver is disabled or V CC2 = 0.

Any cabled I/O can be subjected to electrical noise transients from various sources. These noise transients can cause damage to the transceiver and/or near-by sensitive circuitry if they are of sufficient magnitude and duration. The ISO1176T can significantly reduce the risk of data corruption and damage to expensive control circuits.

The device is characterized for operation over the ambient temperature range of –40°C to 85°C.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 16
Type Title Date
* Data sheet ISO1176T Isolated Profibus RS-485 Transceiver with Integrated Transformer Driver datasheet (Rev. H) PDF | HTML 17 Aug 2023
Certificate VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. W) 31 Jan 2024
Certificate CSA Certificate for ISOxxTDW 21 Feb 2023
Product overview Isolation for RS-485 PDF | HTML 21 Aug 2022
Certificate UL Certificate of Compliance File E181974 Vol 4 Sec 2 10 Aug 2022
Application brief Robust Isolated RS-485 Enables New Industrial Applications (Rev. C) PDF | HTML 26 Jul 2022
Application brief How to Isolate RS-485 for Smallest Size and Highest Reliability (Rev. C) PDF | HTML 06 Jul 2022
White paper Why are Digital Isolators Certified to Meet Electrical Equipment Standards? 16 Nov 2021
White paper Distance Through Insulation: How Digital Isolators Meet Certification Requiremen PDF | HTML 11 Jun 2021
Application brief How to Isolate Signal and Power for an RS-485 System (Rev. C) PDF | HTML 25 May 2021
Technical article How to select the right industrial Ethernet standard: PROFIBUS PDF | HTML 27 Sep 2016
User guide Isolated, 40-Mbps, 3.3-V to 5-V Profibus Interface (Rev. A) 20 Dec 2013
Analog Design Journal 3Q 2011 Issue Analog Applications Journal 16 Sep 2011
Analog Design Journal Isolated RS-485 transceivers support DMX512 stage lighting & special-effects app 16 Sep 2011
Analog Design Journal Журнал по применению аналоговых компонентов 3Q 2011 01 Sep 2011
EVM User's guide ISO1176T/35T/3086T Evaluation Module User's Guide (Rev. A) 13 Jul 2010

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

ISO1176TEVM — ISO1176T Evaluation Module

This document describes the ISO1176T/35T/3086T Evaluation Module (EVM). It is used to evaluate the ISO1176T PROFIBUS Transceiver, the ISO35T RS-485 transceiver, or ISO3086T RS-485 Transceiver. Because the devices are similar transceivers, and the printed-circuit board is the same for all three (...)

User guide: PDF
Not available on TI.com
Evaluation board

ISO1176TEVM-433 — ISO1176T Small EVM

The smaller EVM version shows the customer the space required for their design. This circuit provides an isolated, 40 Mbps, 3.3V to 5V Profibus interface using the ISO1176T, isolated Profibus transceiver and the TPS high accuracy linear regulator. The circuit achieves signal and power isolation (...)

User guide: PDF
Not available on TI.com
Evaluation board

ISO35TEVM — ISO35T Evaluation Module

This document describes the ISO1176T/35T/3086T Evaluation Module (EVM). It is used to evaluate the ISO1176T PROFIBUS Transceiver, the ISO35T RS-485 transceiver, or ISO3086T RS-485 Transceiver. Because the devices are similar transceivers, and the printed-circuit board is the same for all three (...)

User guide: PDF
Not available on TI.com
Application software & framework

PROFIBUS — PROFIBUS on AM1810 ARM® MPUs and OMAP-L138 DSP+ARM Processors

PROFIBUS (Process Field Bus) is the world’s most successful field bus (communication) technology used in industrial automation and is overseen by the PROFIBUS and PROFINET International (PNO/PI) organization. PROFIBUS is a widely deployed technology, and by the end of 2009, there were over 30 (...)
Reference designs

TIDEP0008 — PROFINET Communications Dev Platform

Targeted for PROFINET secondary communications, this reference design helps you implement PROFINET communications standards in a broad range of industrial automation equipment. It enables low-footprint designs in applications such as industrial automation, factory automation or (...)
User guide: PDF
Schematic: PDF
Reference designs

TIDEP0032 — Multi-Protocol Industrial Communications

Industrial Ethernet for industrial automation exists in more than 30 industrial standards. Some of the well-established real-time Ethernet protocols like EtherCAT, EtherNet/IP, PROFINET, Sercos III and PowerLink require dedicated MAC hardware support in terms of FPGA or ASICs. The programmable (...)
User guide: PDF
Schematic: PDF
Reference designs

TIDEP0003 — Ethernet/IP Communications Dev Platform

Targeted for Ethernet/IP secondary communications, this development platform allows you to implement Ethernet/IP communication standards in a broad range of industrial automation equipment. It enables low footprint designs in applications such as industrial automation, factory automation or (...)
Schematic: PDF
Reference designs

TIDEP0054 — Parallel Redundancy Protocol (PRP) Ethernet Reference Design for Substation Automation

This is a reference design for high-reliability, low-latency network communications for substation automation equipment in smart grid transmission and distribution networks. It supports the parallel redundancy protocol (PRP) specification in the IEC 62439 standard using the PRU-ICSS. This reference (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDEP-0075 — Industrial Communications Gateway PROFINET IRT to PROFIBUS Master Reference Design

PROFINET is becoming the leading industrial Ethernet protocol in automation due to its high-speed, deterministic communications and enterprise connectivity. However, as the world’s most popular fieldbus, PROFIBUS’s importance and usage will continue for many years due to legacy (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDEP0027 — High Performance Pulse Train Output (PTO) with PRU-ICSS for Industrial Applications Reference Design

The TIDEP0027 High Performance Pulse Train Output (PTO) with PRU-ICSS for Industrial Application combines the AM335x Sitara processor family from Texas Instruments (TI) and the PTO module into a single system-on-chip (SoC) solution. The design is based on the TMDSICE3359 Industrial Communications (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00005 — Isolated Profibus Interface Reference Design

This reference design provides an isolated, 40-Mbps, 3.3-V to 5-V Profibus interface using the ISO1176T, isolated Profibus transceiver and the TPS76350 high-accuracy linear regulator. This circuit achieves signal and power isolation and at the same time decreases board space and power consumption.
Test report: PDF
Schematic: PDF
Package Pins Download
SOIC (DW) 16 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos