ISO7221CDRG4

Overview

The ISO7221CDRG4 is a dual-channel digital isolator from Texas Instruments, utilizing capacitive coupling technology for signal transmission. It features a 1/1 channel configuration with bidirectional data flow and supports data rates up to 25 Mbps. The device provides an isolation voltage of 2500 Vrms and operates within a supply voltage range of 2.8 V to 5.5 V. Key electrical parameters include a typical propagation delay of 52 ns and a maximum operating temperature of +125°C. It is housed in an SOIC-8 package and complies with RoHS standards.

Feature Summary

• Capacitive coupling technology ensures high reliability and long-term stability without the degradation risks associated with optical components.
• Bidirectional data channels allow flexible signal routing between isolated domains.
• Wide operating temperature range supports deployment in demanding industrial environments.

Applications

• Industrial automation systems requiring robust signal isolation
• Medical equipment needing high-voltage safety compliance
• Power management circuits for accurate feedback monitoring

Procurement Notes

Verify the specific suffix 'RG4' against official Texas Instruments documentation to confirm reel packaging and RoHS compliance status. Ensure that the ordering information matches the exact datasheet revision required for your design. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm that the SOIC-8 footprint aligns with your PCB layout specifications before finalizing procurement.

Selection Notes

Select this component when bidirectional communication at 25 Mbps is required within a single isolator channel pair. Compare against the ISO7221ADR variant if lower power consumption at reduced speeds is prioritized over higher throughput. Consider the thermal performance and package constraints relative to the ISO7221CD legacy version. Evaluate system-level isolation requirements to ensure the 2500 Vrms rating meets safety standards.

Part Context

This device belongs to the ISO7221C series of general-purpose digital isolators. It serves as a modern replacement for older optocoupler-based designs, offering superior speed and size efficiency. The RG4 suffix indicates tape-and-reel packaging suitable for automated surface-mount assembly processes.

Replacement Considerations

The ISO7221CD is listed as obsolete; the ISO7221CDRG4 serves as the active replacement. Verify pin compatibility and parameter equivalence during transition.