ISO15DW

Overview

The ISO15DW is a digital isolator featuring an integrated RS-485 transceiver, manufactured by Texas Instruments. It operates with a supply voltage range of 3.15 V to 3.6 V and supports data rates up to 1 Mb/s. The device utilizes capacitive coupling for isolation, providing an insulation voltage of 2500 Vrms. It is housed in a 16-pin SOIC package and draws a typical operating supply current of 19 mA. The propagation delay is specified at 340 ns. This component is designed for unidirectional signal transmission in industrial communication environments.

Feature Summary

• Integrates RS-485 transceiver functionality within a digital isolator architecture
• Provides galvanic isolation via capacitive coupling technology
• Supports full-duplex and half-duplex communication modes
• Operates on a single 3.3 V power supply rail

Applications

• Industrial automation systems requiring isolated RS-485 communication
• Factory floor sensor networks
• Building automation control loops
• Process control instrumentation

Procurement Notes

Verify the specific revision level and manufacturing date code upon receipt, as this component has reached end-of-life status according to available distributor records. Ensure compatibility with existing PCB footprints and design-in documentation before finalizing procurement plans. Confirm that the SOIC-16 package dimensions match the target assembly requirements.

Selection Notes

Select this component when a combined isolation barrier and RS-485 interface is required in a compact form factor. It is suitable for designs needing 3.3 V operation and moderate data rates up to 1 Mb/s. Consider the 340 ns propagation delay for timing-sensitive applications. Evaluate thermal performance within the SOIC-16 package constraints for high-density layouts.

Part Context

The ISO15DW belongs to the ISO15 series of isolated RS-485 transceivers from Texas Instruments. It combines the benefits of digital isolation with standard serial communication protocols. The device simplifies system design by reducing component count compared to discrete solutions. It is part of a broader family of interface ICs aimed at enhancing noise immunity in electrically noisy industrial environments.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Due to the end-of-life status, alternative components should be evaluated based on pin compatibility, electrical specifications, and isolation ratings.