ISO7321FCD

Overview

The ISO7321FCD is a low-power, dual-channel digital isolator from Texas Instruments, housed in an 8-SOIC package. It provides galvanic isolation with a rated insulation voltage of 3000 Vrms and supports data rates up to 25 Mbps. The device operates within a supply voltage range of 3 V to 5.5 V, drawing a typical operating current of 4.9 mA per channel. It features a propagation delay of 32 ns and functions reliably across an extended temperature range from -40°C to +125°C.

Feature Summary

• Provides robust electromagnetic compatibility (EMC) performance for noisy industrial environments
• Offers low power consumption suitable for energy-efficient system designs
• Delivers high-speed bidirectional or unidirectional signal transmission

Applications

• Industrial automation and control systems
• Medical equipment requiring electrical safety isolation
• Power metering and smart grid infrastructure

Procurement Notes

Verify the specific suffix against official datasheets to confirm polarity configuration, as variants exist for both bidirectional and unidirectional operation. Ensure the SOIC-8 package width matches design constraints. Confirm RoHS compliance status through manufacturer documentation before finalizing procurement specifications.

Selection Notes

Select this component when dual-channel isolation is required at moderate speeds. Compare power dissipation limits against thermal management capabilities. Verify that the 3000 Vrms insulation rating meets the specific safety standards of the target application environment.

Part Context

This part belongs to the ISO7321FC family of robust, low-power digital isolators. It serves as a general-purpose solution for replacing optocouplers in modern interface circuits. The series emphasizes reliability and compact footprint integration for various electronic systems.

Replacement Considerations

Check pinout compatibility with existing optocoupler designs. Verify that the replacement maintains the required isolation voltage and data rate specifications for the specific circuit application.