ISO7842FDWW

Overview

The ISO7842FDWW is a quad-channel digital isolator from Texas Instruments, housed in a 16-pin SOIC package. It utilizes capacitive coupling technology to provide reinforced isolation with a maximum insulation voltage of 5700 Vrms. The device supports data rates up to 100 Mb/s and features a propagation delay of 11 ns. It operates on a supply voltage range of 2.25 V to 5.5 V, drawing a typical operating current of 13.7 mA. The component offers bidirectional or unidirectional channel configurations and maintains an extended operating temperature range from -55°C to +125°C.

Feature Summary

• Provides reinforced isolation capabilities suitable for demanding industrial applications
• Integrates four independent channels within a single compact surface-mount package
• Employs capacitive coupling architecture for high-speed signal transmission across isolation barriers

Applications

• Industrial automation systems requiring galvanic isolation
• Power electronics control circuits
• Medical equipment signal interfaces
• Data acquisition systems with isolated inputs

Procurement Notes

Verify the specific suffix 'FDW' against official Texas Instruments documentation to confirm the exact pinout configuration and packaging variant. Ensure that the selected component matches the required isolation rating and channel directionality for the target circuit design. Cross-reference the datasheet revision history to confirm compatibility with existing system specifications before finalizing procurement orders.

Selection Notes

Select this component when high-density quad-channel isolation is required in a standard SOIC footprint. Consider the 100 Mb/s data rate limit and 11 ns propagation delay for timing-sensitive applications. Evaluate the 5700 Vrms insulation rating against system safety standards. Confirm that the 2.25 V to 5.5 V supply range aligns with the available power rails in the design environment.

Part Context

This part belongs to the ISO7842 family of digital isolators, designed to replace traditional optocouplers in modern electronic designs. The series emphasizes higher performance metrics including improved common-mode transient immunity and lower power consumption compared to legacy technologies. It serves as a key interface solution for separating noisy ground domains in complex mixed-signal systems.

Replacement Considerations

ISO7842FDWWR

FAQ

What is the maximum insulation voltage rating for the ISO7842FDWW?

The device provides a maximum insulation voltage of 5700 Vrms.

Does the ISO7842FDWW support bidirectional communication?

Yes, the component supports both unidirectional and bidirectional channel configurations depending on the specific ordering variant.