ISO15MDWR

Overview

The ISO15MDWR is a digital isolator from the ISO15 series, manufactured by Texas Instruments. It integrates an isolated half-duplex RS-485 transceiver with three-channel capacitive coupling isolation in a single 16-pin SOIC package. The device supports data rates up to 1 Mb/s and operates within a supply voltage range of 3.15 V to 3.6 V. It provides 2500 Vrms isolation voltage and features a common-mode transient immunity of 25 kV/µs. The component is rated for extended operating temperatures from -55°C to +125°C.

Feature Summary

• Integrates an isolated half-duplex RS-485 transceiver with three-channel digital isolation
• Provides high common-mode transient immunity of 25 kV/µs for robust signal integrity
• Supports extended industrial temperature ranges suitable for harsh environments

Applications

• Industrial automation control systems requiring galvanic isolation
• RS-485 communication networks in noisy electrical environments
• Process control instrumentation with differential signaling needs

Procurement Notes

Verify the specific suffix 'M' indicates the extended temperature grade (-55°C to +125°C) compared to standard variants. Confirm the SOIC-16 package dimensions match your PCB footprint requirements. Ensure compatibility with 3.3 V logic levels on both sides of the isolation barrier. Check for RoHS compliance status in the latest datasheet revision.

Selection Notes

Select this part when combining RS-485 transceiver functionality with multi-channel digital isolation is required in a compact form factor. It serves as an alternative to discrete solutions using separate isolators and transceivers. Consider the 1 Mb/s speed limit for applications not requiring higher baud rates. Evaluate power consumption against system thermal constraints given the integrated nature of the device.

Part Context

This component belongs to the ISO15 family of isolated transceivers designed for RS-485 and RS-422 applications. It differs from the ISO35 series primarily in its extended temperature rating and specific channel configuration. The device simplifies board design by merging transceiver and isolation functions into one semiconductor solution.

Replacement Considerations

ISO15DWR is a related variant with potentially different temperature ratings. ISO35DWR offers similar functionality but may differ in temperature specifications. Verify pinout compatibility and electrical parameters before substitution.