ISO7221CDG4

Overview

The ISO7221CDG4 is a dual-channel digital isolator from the ISO7221C series, manufactured by Texas Instruments. It utilizes capacitive coupling technology to provide bidirectional signal isolation with a data rate of 25 Mbps and an insulation voltage of 2500 Vrms. The device operates within a supply voltage range of 2.8 V to 5.5 V and features a propagation delay of 52 ns. Designed for surface-mount installation, it is housed in an SOIC-8 package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Bidirectional signal transmission capability across two isolated channels
• High-speed data communication support up to 25 Mbps
• Robust capacitive coupling isolation architecture

Applications

• General-purpose digital isolation in industrial systems
• Isolation interfaces for microcontrollers and processors
• Signal isolation in measurement and control circuits

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific packaging variants such as tube or reel options. Ensure the part number suffix matches the required package style and environmental specifications before finalizing procurement orders.

Selection Notes

Select this component when bidirectional isolation is required for high-speed digital signals. Compare against unidirectional alternatives if signal directionality constraints exist. Evaluate power consumption requirements against the specified operating current and ensure thermal management aligns with the wide operating temperature range capabilities.

Part Context

This component belongs to the ISO7221 family of digital isolators, which includes variants like ISO7221ADR and ISO7221CDR. These devices share similar core functionalities but differ in data rates, channel configurations, and package types. The ISO7221CDG4 specifically represents the C-series variant optimized for higher speed applications compared to lower-speed predecessors.

Replacement Considerations

Public sources indicate that the ISO7221CDG4 is obsolete. Recommended substitutes include the ISO7221CDR, which offers identical electrical characteristics and functionality in a tape-and-reel package format suitable for automated assembly processes.