ISO7321CDR

Overview

The ISO7321CDR is a dual-channel digital isolator from the ISO7321C series, manufactured by Texas Instruments. It provides galvanic isolation with a maximum insulation voltage of 3000 Vrms and supports data rates up to 25 Mb/s. The device operates within a supply voltage range of 3 V to 5.5 V, drawing a typical quiescent current of 3.7 mA per channel. It features unidirectional signal transmission with one forward and one reverse channel. Key electrical parameters include a propagation delay of 33 ns and a power dissipation of 56 mW. The component is rated for operation between -40°C and +125°C and is housed in an SOIC-8 surface-mount package.

Feature Summary

• Provides robust electromagnetic compatibility performance through integrated input noise filtering.
• Delivers high-reliability galvanic isolation suitable for demanding industrial environments.
• Offers low-power consumption characteristics optimized for energy-efficient system designs.

Applications

• Industrial automation systems requiring reliable signal transmission across isolated boundaries.
• Medical equipment utilizing galvanic isolation for patient safety and signal integrity.
• Power electronics interfaces where high common-mode transient immunity is required.

Procurement Notes

Verify the specific suffix 'CDR' to confirm the SOIC-8 tape-and-reel packaging configuration. Ensure the order matches the ISO7321C series designation for correct EMC and low-power specifications. Confirm RoHS compliance status as indicated in official documentation before finalizing procurement. Cross-reference the manufacturer part number against authorized distributor catalogs to avoid counterfeit components.

Selection Notes

Select this component when a dual-channel solution with unidirectional data flow is required. The 25 Mb/s data rate suits moderate-speed communication links. Consider the SOIC-8 footprint for space-constrained printed circuit board layouts. Evaluate the 3000 Vrms isolation rating against system safety requirements. Compare power consumption metrics if battery-operated applications are involved.

Part Context

This device belongs to the ISO7321C family of digital isolators designed for robust performance. It serves as an interface solution between microcontrollers and peripheral devices in noisy environments. The series emphasizes durability and low power usage compared to older isolation technologies. It replaces legacy optocoupler solutions in modern industrial and medical applications.

Replacement Considerations

Check for pin-compatible alternatives within the same isolation voltage class. Verify that substitute components support the required 25 Mb/s data rate and unidirectional configuration. Ensure thermal performance and operating temperature ranges match the original design constraints.