ISO721DUB

Overview

The ISO721DUB is a single-channel high-speed digital isolator from Texas Instruments, housed in an 8-SOIC package. It supports data rates up to 100 Mbps with a propagation delay of 17 ns and common-mode transient immunity of 25 kV/µs. The device operates on a 3 V to 5.5 V supply and provides 2500 Vrms isolation voltage. It functions within a temperature range of -40°C to +125°C.

Feature Summary

• Provides galvanic isolation between circuits using capacitive coupling technology.
• Supports bidirectional signal transmission for general-purpose applications.
• Features robust electromagnetic interference (EMI) immunity.

Applications

• Industrial automation systems requiring isolated communication interfaces.
• Medical equipment needing safety-certified signal isolation.
• Power electronics monitoring and control circuits.

Procurement Notes

Verify the specific suffix 'DUB' corresponds to the 8-SOIC package variant. Confirm end-of-life status as distributors list this part as obsolete. Check for valid RoHS compliance documentation if required by your manufacturing standards. Ensure the supplier provides traceable origin for quality assurance purposes.

Selection Notes

Select this component when a single channel of high-speed isolation is sufficient. Compare against the ISO721MDG4 for similar performance in different packaging. Consider the ISO7221AD if dual-channel isolation is needed instead. Verify that the 2500 Vrms rating meets your system's safety requirements.

Part Context

This device belongs to the ISO721x family of high-speed digital isolators. It utilizes Texas Instruments' silicon dioxide (SiO2) insulation technology. The family includes variants with different channel counts and package options. These components are designed for reliable operation in noisy industrial environments.

Replacement Considerations

The ISO721MDG4 is a documented alternative offering similar electrical characteristics. Other potential substitutes include the ISO7211 series for enhanced features. Verify pin compatibility before replacing the obsolete ISO721DUB in existing designs.