ISO7842FDWR

Overview

The ISO7842FDWR is a quad-channel digital isolator from Texas Instruments utilizing capacitive coupling technology. It operates within a supply voltage range of 2.25 V to 5.5 V and supports data rates up to 100 Mb/s. The device features a reinforced isolation rating of 5700 Vrms and a common-mode transient immunity of 100 kV/µs. It provides bidirectional or unidirectional signal transmission with a typical propagation delay of 11 ns. Operating temperatures span from -55°C to +125°C, housed in a 16-pin SOIC package.

Feature Summary

• Provides reinforced electrical isolation for high-noise industrial environments
• Supports wide supply voltage ranges enabling direct level translation between different logic domains
• Delivers high common-mode transient immunity to maintain signal integrity under rapid voltage changes

Applications

• Industrial automation systems requiring robust signal isolation
• Medical equipment needing reinforced safety isolation
• Power metering applications with high-voltage interfaces

Procurement Notes

Verify the specific suffix FDWR against official datasheets to confirm bidirectional channel configuration and SOIC-16 packaging. Ensure compatibility with moisture sensitivity levels and reflow soldering profiles during assembly. Confirm that the 5700 Vrms reinforced isolation rating meets the specific safety standards required by the target application environment.

Selection Notes

Select this component when bidirectional communication across four isolated channels is required. It is suitable for designs needing wide operating temperature ranges and high-speed data transmission up to 100 Mbps. Consider the 16-pin SOIC footprint for PCB layout constraints and verify power dissipation limits under maximum load conditions.

Part Context

This part belongs to the ISO7842 family of high-performance digital isolators. It shares core specifications with variants like ISO7842DWWR but differs in channel directionality and packaging options. The series is designed to replace traditional optocouplers in modern interface circuits.

Replacement Considerations

ISO7842FDWWR offers similar isolation characteristics with potentially different packaging or tape-and-reel configurations.