ISO7821FDWR

Overview

The ISO7821FDWR is a dual-channel digital isolator from Texas Instruments, housed in an SOIC-16 surface-mount package. It features capacitive coupling technology with a maximum data rate of 100 Mb/s and a propagation delay of 11 ns. The device supports a supply voltage range of 2.25 V to 5.5 V and operates within a temperature range of -55°C to +125°C. Key electrical specifications include an insulation voltage of 5700 Vrms and a typical operating supply current of 7.5 mA. It provides unidirectional signal transmission without a shutdown function.

Feature Summary

• Provides high-performance dual-channel isolation using capacitive coupling technology for reliable signal transmission across isolation barriers.
• Supports wide supply voltage operation ranging from 2.25 V to 5.5 V, enabling compatibility with various logic levels.
• Features a compact SOIC-16 surface-mount package designed for efficient board space utilization in dense electronic designs.

Applications

• Industrial automation systems requiring robust signal isolation
• Medical equipment needing enhanced safety isolation barriers
• Power metering applications involving high-voltage sensing

Procurement Notes

Verify the specific suffix 'W' confirms the reel packaging format rather than tube packaging when sourcing components. Ensure the order matches the required moisture sensitivity level handling procedures during storage and assembly. Confirm that the selected distributor source aligns with the manufacturer's authorized channel list to guarantee component authenticity and traceability.

Selection Notes

Choose this component when a dual-channel solution with high insulation voltage is required for unidirectional signaling. Consider the 100 Mb/s data rate limit against system bandwidth needs. Evaluate the SOIC-16 footprint constraints against available PCB real estate compared to alternative package options within the same series.

Part Context

This part belongs to the ISO7821 series of digital isolators manufactured by Texas Instruments. It serves as a specialized interface IC designed to replace traditional optocouplers in modern applications. The series focuses on providing higher reliability and lower power consumption while maintaining strict isolation standards for sensitive electronic circuits.

Replacement Considerations

ISO7821FDW is the tube-packaged equivalent of this reel-based component. Both parts share identical electrical characteristics and pinouts, differing only in shipping configuration.