ISO7321FCDR

Overview

The ISO7321FCDR is a dual-channel digital isolator from the ISO7321FC series, manufactured by Texas Instruments. It provides galvanic isolation with a 3000 Vrms insulation voltage and operates at data rates up to 25 Mb/s. The device features unidirectional signal paths, with one forward and one reverse channel. It functions within a supply voltage range of 3 V to 5.5 V, drawing a typical operating current of 3.7 mA. Key electrical parameters include a propagation delay of 33 ns and power dissipation of 56 mW. The component supports an extended operating temperature range from -40°C to +125°C and is housed in an SOIC-8 surface-mount package.

Feature Summary

• Provides robust electromagnetic compatibility performance for noisy industrial environments
• Delivers low-power operation suitable for energy-constrained applications
• Ensures reliable galvanic isolation between circuit domains

Applications

• Industrial automation systems requiring signal isolation
• Medical equipment needing safe patient isolation
• Power metering circuits for accurate measurement separation

Procurement Notes

Verify the specific suffix 'F' indicates the required automotive qualification level if applicable to your design. Confirm the 'R' suffix corresponds to the reel packaging format required for your assembly line. Ensure the SOIC-8 footprint matches your PCB layout constraints. Check humidity sensitivity levels for proper storage and reflow soldering profiles according to manufacturer guidelines.

Selection Notes

Select this component when high EMC immunity and low power consumption are critical. The unidirectional configuration suits applications where signal flow is strictly one-way across the isolation barrier. Consider the 3000 Vrms rating for basic isolation requirements. Evaluate the 25 Mb/s speed against system timing needs. The wide temperature range supports harsh environment deployments without derating concerns.

Part Context

This part belongs to the ISO7321FC family of robust, low-power digital isolators. It serves as a specialized interface solution for separating digital signals across isolation barriers while maintaining signal integrity. The series is designed to meet stringent industry standards for electromagnetic compatibility and reliability in demanding operational conditions.

Replacement Considerations

The ISO7321FCD is the tube-packaged equivalent of this reel-based component. Both share identical electrical specifications and pinouts. Verify that the change in packaging does not impact automated placement processes or inventory management strategies.