ISO721MD

Overview

The ISO721MD is a single-channel high-speed digital isolator manufactured by Texas Instruments. It utilizes capacitive coupling technology to provide electrical isolation between input and output sides. The device supports data rates up to 150Mbps with a typical propagation delay of 16ns. It operates within a supply voltage range of 3V to 5.5V and offers an isolation voltage rating of 2500Vrms. The component features a common-mode transient immunity (CMTI) of 25kV/µs, ensuring reliable signal transmission in noisy environments. It is housed in an 8-SOIC package suitable for surface-mount applications.

Feature Summary

• Provides galvanic isolation using internal capacitive coupling architecture
• Supports high-speed data transmission up to 150Mbps
• Ensures signal integrity with high common-mode transient immunity
• Operates on standard 3V or 5V logic supply voltages

Applications

• Industrial communication interfaces requiring signal isolation
• Medical equipment needing patient isolation barriers
• Power electronics control circuits with ground potential differences
• General-purpose digital isolation in noisy electromagnetic environments

Procurement Notes

Verify the specific suffix 'MD' against the manufacturer's current datasheet to confirm pinout and packaging dimensions. Ensure the design accounts for the 2500Vrms isolation rating relative to system safety requirements. Confirm RoHS compliance status if restricted substances are a constraint. Check for any recent product change notifications regarding manufacturing site or material composition updates.

Selection Notes

Select this component when a single isolated channel is sufficient for the application. Consider the 150Mbps speed limit against the required data throughput. Evaluate the 8-SOIC footprint against available PCB space. Compare the 2500Vrms isolation level with system insulation requirements. Assess power consumption at the target operating frequency to ensure thermal management compatibility.

Part Context

This part belongs to the ISO721 family of high-speed digital isolators from Texas Instruments. The family focuses on providing robust isolation for digital signals in industrial and commercial applications. The ISO721 series typically includes variants with different channel counts and speeds, such as dual-channel or lower-speed options, sharing similar core isolation technologies and package styles.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs before considering alternative components.