ISO7821LLSDWR

Overview

The ISO7821LLSDWR is a high-performance, dual-channel digital isolator from Texas Instruments featuring bidirectional data flow. It utilizes capacitive coupling technology to provide robust signal isolation with a maximum data rate of 150 Mbps and a common-mode transient immunity (CMTI) of 100 kV/µs. The device operates within a supply voltage range of 3 V to 5.5 V and offers an insulation voltage of 5700 Vrms. Packaged in a 16-pin SOIC (DW) format, it supports an operating temperature range from -55°C to +125°C.

Feature Summary

• Bidirectional data transmission capability for flexible circuit design
• High electromagnetic immunity via capacitive coupling isolation
• Wide operating temperature range suitable for harsh environments

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing enhanced safety isolation
• Power electronics control interfaces

Procurement Notes

Verify the specific suffix 'LLS' indicates the LVDS buffer variant with 8000-VPK isolation when cross-referencing datasheets. Confirm package dimensions match the 16-SOIC specification. Ensure compatibility with system voltage levels between 3 V and 5.5 V before integration.

Selection Notes

Select this component for applications demanding bidirectional communication over isolated barriers. The 150 Mbps speed suits moderate-speed industrial protocols. Consider the 16-pin SOIC footprint for PCB layout constraints. Verify thermal management requirements given the 125°C maximum junction temperature.

Part Context

Part of the ISO7821 family, which includes unidirectional variants like ISO7821LLDWR. The LLS suffix distinguishes it as a dual-LVDS buffer with higher peak isolation voltage compared to standard general-purpose isolators in the same series.

Replacement Considerations

ISO7821LLDWR is a related unidirectional variant within the same family. Verify channel directionality requirements before substitution.