ISO7842FDWWR

Overview

The ISO7842FDWWR 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 provides reinforced isolation with an insulation voltage of 5700 Vrms and a common-mode transient immunity of 100 kV/µs. It features four unidirectional channels, each with a propagation delay of 16 ns maximum. Operating temperatures span from -55°C to +125°C. The component is housed in a 16-pin SOIC package.

Feature Summary

• Provides reinforced electrical isolation for high-voltage industrial applications
• Delivers high common-mode transient immunity to prevent signal errors
• Supports bidirectional or unidirectional data transmission across four isolated channels

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced safety isolation
• Power metering and energy monitoring circuits

Procurement Notes

Verify the specific suffix FDWWR against official datasheets to confirm unidirectional channel configuration and SOIC-16 packaging. Ensure compliance with RoHS directives and humidity sensitivity levels before integration. Confirm that the required isolation ratings meet system safety standards. Cross-reference manufacturer part numbers to avoid substitution errors.

Selection Notes

Select this component when reinforced isolation and high CMTI are critical for system reliability. The 100 Mbps data rate suits moderate-speed communication interfaces. Consider the 16-pin SOIC footprint for PCB layout constraints. Evaluate power consumption requirements against the typical operating current specifications provided in the technical documentation.

Part Context

This device belongs to the ISO7842 family of digital isolators designed for robust performance in noisy environments. It replaces traditional optocouplers by offering superior speed, lower power consumption, and smaller form factors. The series is engineered to meet stringent industrial and medical isolation standards.

Replacement Considerations

Consult official replacement guides for compatible alternatives. Verify pinout compatibility and isolation voltage ratings before substituting.