ISO7420FEDR

Overview

The ISO7420FEDR is a low-power, dual-channel digital isolator from Texas Instruments, utilizing capacitive coupling technology for signal transmission. It operates within a supply voltage range of 3.3 V to 5 V and supports data rates up to 50 Mb/s. The device provides an isolation voltage of 2500 Vrms and features a common-mode transient immunity of 25 kV/µs. Packaged in an 8-SOIC format, it exhibits a propagation delay of 7 ns and consumes 2.5 mA of operating current. The component functions bidirectionally with two forward channels and zero reverse channels, ensuring reliable performance across an industrial temperature range of -40°C to +125°C.

Feature Summary

• Capacitive coupling architecture enables robust signal isolation without magnetic components.
• High common-mode transient immunity ensures data integrity in noisy environments.
• Low power consumption design supports energy-efficient system operation.
• Unidirectional channel configuration simplifies interface integration.

Applications

• Industrial communication bus isolation
• Medical equipment signal isolation
• Power metering and smart grid interfaces

Procurement Notes

Verify the complete part number including suffixes to ensure correct packaging and temperature grade. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Cross-reference datasheet revisions to validate electrical characteristics against specific design requirements. Ensure ordering quantities align with standard reel sizes or cut tape availability as specified by distributors.

Selection Notes

Select this component when dual-channel unidirectional isolation is required with low power constraints. The 8-SOIC package offers a compact footprint suitable for space-constrained designs. Verify that the 50 Mb/s data rate meets application bandwidth needs. Consider the 2500 Vrms isolation rating for safety-critical applications requiring galvanic separation between high-voltage and low-voltage domains.

Part Context

This device belongs to the ISO742x family of low-power digital isolators manufactured by Texas Instruments. It shares architectural similarities with other members like the ISO7421 but differs in channel configuration and directionality. The series emphasizes energy efficiency and reliability for general-purpose isolation tasks in industrial and medical sectors.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult official Texas Instruments documentation for qualified replacements or pin-compatible alternatives.