ISO1176DW

Overview

The ISO1176DW is a half-duplex, isolated RS-485 and PROFIBUS transceiver manufactured by Texas Instruments. It integrates a digital isolator with capacitive coupling technology to provide galvanic isolation between the device sides. The component supports signaling rates up to 40 Mbps and operates within a supply voltage range of 3.15 V to 5.5 V. It features a propagation delay of 80 ns and an insulation voltage rating of 2500 Vrms. The device is housed in a 16-pin SOIC package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates capacitive coupling digital isolation for robust signal transmission
• Complies with EN 50170 and TIA/EIA-485-A standards
• Supports differential output exceeding 2.1 V into 54 Ω loads

Applications

• PROFIBUS communication networks
• Industrial automation systems
• RS-485 bus interfaces

Procurement Notes

Verify the specific suffix 'DW' indicates tube packaging when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets. Ensure the part number matches the exact revision required for your design, as updates may occur. Cross-reference with the ISO1176DWR variant if reel packaging is preferred instead of tubes.

Selection Notes

Select this component for applications requiring certified PROFIBUS isolation. The 2500 Vrms isolation barrier suits industrial environments with high noise. Consider the 80 ns propagation delay for timing-sensitive designs. The 16-pin SOIC footprint requires appropriate PCB layout considerations for thermal management and signal integrity.

Part Context

This device belongs to the ISO1176 series of isolated transceivers from Texas Instruments. It combines RS-485/RS-422 functionality with integrated digital isolation, reducing the need for external isolators. The series is designed for harsh industrial environments where electrical safety and noise immunity are critical.

Replacement Considerations

The ISO1176DWG4 is a lead-free version of the same functional device. Verify pinout compatibility before substitution. Check if the replacement meets the same insulation voltage and data rate requirements.