ISOW7843DWE

Overview

The ISOW7843DWE is a high-performance, reinforced quad-channel digital isolator from Texas Instruments. It features four channels with one forward and three reverse directions, operating at data rates up to 100 Mb/s. The device provides an insulation voltage of 5000 Vrms and supports a supply voltage range of 3 V to 5.5 V. Key electrical parameters include a propagation delay of 13 ns, common-mode transient immunity of 100 kV/µs, and an operating temperature range from -40°C to +125°C. It utilizes both capacitive and magnetic coupling technologies within a 16-SOIC package.

Feature Summary

• Integrates reinforced isolation technology combining capacitive and magnetic coupling for enhanced signal integrity.
• Provides unidirectional data transmission with configurable channel directionality (1/3 split).
• Includes a shutdown function to minimize power consumption during idle states.
• Delivers high common-mode transient immunity to maintain performance in noisy environments.

Applications

• Industrial automation systems requiring galvanic isolation between control and sensor domains.
• Medical equipment needing reinforced isolation for patient safety compliance.
• Power electronics interfaces for monitoring and control circuits in high-voltage environments.
• Data acquisition systems connecting isolated sensors to microprocessors.

Procurement Notes

Verify the specific suffix 'DWE' corresponds to the SOIC-16 tube packaging configuration when ordering. Confirm that the required isolation rating meets the application's safety standards, as this component offers reinforced isolation. Ensure the design accounts for the specified operating supply current and thermal dissipation limits within the 16-SOIC footprint. Cross-reference the datasheet for any recent updates regarding moisture sensitivity levels or recommended soldering profiles.

Selection Notes

Select this component when reinforced isolation is mandated by safety regulations rather than basic isolation. It is suitable for applications requiring bidirectional-like functionality through multiple reverse channels alongside a single forward path. Consider the 100 Mb/s data rate limit and 13 ns propagation delay for timing-sensitive designs. Evaluate the 16-SOIC package constraints against available board space and thermal management requirements.

Part Context

This part belongs to the ISOW7843 series, which focuses on high-speed digital isolation with integrated isolation capabilities. Unlike standard isolators, it combines capacitive and magnetic technologies to reduce emissions and improve reliability. The DWE variant specifically denotes the surface-mount SOIC-16 package format, distinguishing it from tape-and-reel options like the FDWER suffix.

Replacement Considerations

Direct substitutes within the same family include ISOW7843FDWER, which shares identical electrical specifications but differs in packaging (tape and reel vs. tube). Other variants such as ISOW7841DWE offer similar isolation characteristics but may differ in channel configuration or emission profiles. Verify pin compatibility and thermal performance before swapping packages.

FAQ

What type of isolation technology does the ISOW7843DWE use?

It utilizes a combination of capacitive coupling and magnetic coupling to achieve reinforced isolation.

Is the ISOW7843DWE capable of bidirectional communication?

No, it is unidirectional, configured with one forward channel and three reverse channels.

What is the maximum common-mode transient immunity of this device?

The device guarantees a minimum common-mode transient immunity of 100 kV/µs.