ISO15DWR

Overview

The ISO15DWR is a digital isolator from Texas Instruments featuring an integrated isolated RS-485 transceiver. It operates on a single 3.3 V supply and supports data rates up to 1 Mb/s. The device provides 2500 Vrms isolation via capacitive coupling and offers a minimum common-mode transient immunity of 25 kV/µs. It is housed in a 16-pin SOIC package with a wide operating temperature range of -40°C to 85°C.

Feature Summary

• Integrates a unidirectional digital isolator with an isolated half-duplex RS-485 transceiver for combined signal isolation and bus driving.
• Provides robust noise immunity with a minimum common-mode transient immunity rating of 25 kV/µs.
• Supports high node density by meeting TIA/EIA RS-485 requirements with an 1/8 unit load specification.

Applications

• Industrial automation systems requiring galvanic isolation between control logic and field devices.
• Multi-drop communication networks supporting up to 256 nodes on a single bus.
• Factory equipment interfaces needing reliable data transmission in electrically noisy environments.

Procurement Notes

Verify the specific suffix 'W' indicates the SOIC-16 package width and 'R' denotes reel packaging. Confirm RoHS compliance status and lead-free manufacturing details through official Texas Instruments documentation prior to procurement.

Selection Notes

Select this component when a single-channel solution is required for both digital signal isolation and RS-485 physical layer communication. Ensure the system voltage matches the 3.15 V to 3.6 V operating range and that the thermal environment stays within the specified industrial temperature limits.

Part Context

This part belongs to the ISO15 family of isolated transceivers, designed specifically for RS-485 applications. It combines the functionality of a standard digital isolator with a line driver and receiver, simplifying board layout by reducing component count compared to discrete solutions.

Replacement Considerations

ISO15DW serves as the tape-and-reel equivalent without the reel suffix distinction in some catalogs. ISO15DG4 represents the lead-free version of the same functional device.