ISO7421EDR

Overview

The ISO7421EDR is a low-power, dual-channel digital isolator from Texas Instruments utilizing capacitive coupling technology. It operates within a supply voltage range of 3V to 5.5V and supports data rates up to 50 Mbps. The device provides an isolation voltage of 2500 Vrms with a common-mode transient immunity (CMTI) of 25 kV/µs. It features unidirectional signal transmission in a 1/1 channel configuration. Typical propagation delay is 7 ns, with maximum delays of 11 ns. Operating temperatures span from -40°C to +125°C. The component is housed in an 8-SOIC package.

Feature Summary

• Capacitive coupling architecture for high-speed digital signal isolation
• Low power consumption suitable for energy-efficient designs
• High common-mode transient immunity for noise resilience
• Default output state options for flexible logic integration

Applications

• Industrial automation systems requiring galvanic isolation
• Automotive electronics interfaces
• Consumer device communication links
• General-purpose circuit isolation

Procurement Notes

Verify the specific suffix 'EDR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the 8-SOIC footprint matches the target PCB layout dimensions. Ensure the operating temperature range meets the environmental specifications of the final application. Cross-reference the datasheet revision date to confirm compliance with current RoHS standards.

Selection Notes

Select this component when bidirectional isolation is not required due to its unidirectional 1/1 channel design. Consider the 50 Mbps signaling rate against system bandwidth requirements. Evaluate the 2500 Vrms isolation rating against safety standards. Compare power consumption metrics with alternative technologies if battery life is critical.

Part Context

This part belongs to the ISO7421E series of general-purpose digital isolators. It shares the SOIC-8 package form factor with other members of the family but differs in channel configuration and speed capabilities. The EDR suffix specifically denotes the reel-based packaging variant intended for surface-mount manufacturing lines.

Replacement Considerations

ISO7420EDR: Offers identical electrical performance but features a 2/0 channel configuration instead of 1/1.