ISO7821FDWWR

Overview

The ISO7821FDWWR is a high-performance, dual-channel digital isolator from Texas Instruments featuring capacitive coupling technology. It provides an insulation voltage of 5700 Vrms and supports data rates up to 100 Mb/s with a propagation delay of 11 ns. The device operates within a supply voltage range of 2.25 V to 5.5 V and consumes 7.5 mA of working power current. It is housed in a 16-pin SOIC package and functions reliably across a temperature range of -55°C to +125°C.

Feature Summary

• Capacitive coupling isolation for robust signal transmission
• High insulation rating of 5700 Vrms for safety compliance
• Unidirectional channel configuration for precise data flow

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced isolation barriers
• Power electronics interfaces for noise immunity

Procurement Notes

Verify the specific suffix 'WR' corresponds to the reel packaging format required for your assembly line. Confirm that the 16-pin SOIC footprint matches your PCB design constraints. Ensure the component meets RoHS standards if applicable to your region. Check humidity sensitivity levels for proper storage and handling procedures during manufacturing.

Selection Notes

Select this model when unidirectional signal isolation is sufficient for the application. The 100 Mb/s data rate suits moderate-speed communication needs. Consider the 7.5 mA current consumption against system power budgets. The wide operating temperature range ensures stability in harsh environments without additional thermal management.

Part Context

This part belongs to the ISO7821 series of digital isolators. It shares the same core isolation architecture as other variants in the family but differs in packaging and speed characteristics. The FDWWR designation indicates a specific tape-and-reel configuration optimized for automated surface-mount placement processes.

Replacement Considerations

ISO7821FDW is the tube-packaged equivalent with identical electrical specifications. ISO7821LLDWR offers higher speed capabilities but may require different interface considerations. Verify pinout compatibility before substituting with other Texas Instruments isolator families.