ISO7841FDWR

Overview

The ISO7841FDWR is a quad-channel reinforced digital isolator manufactured by Texas Instruments. It features four independent channels with a 3/1 input-output configuration and supports unidirectional data transmission at speeds up to 100 Mbps. The device utilizes capacitive coupling technology to provide an isolation voltage of 5700 Vrms and a common-mode transient immunity (CMTI) of 100 kV/µs. It operates within a supply voltage range of 2.25 V to 5.5 V, with maximum propagation delays of 16 ns for both rising and falling edges. The component is housed in a 16-SOIC package and functions reliably across an extended temperature range from -55°C to +125°C.

Feature Summary

• Provides reinforced galvanic isolation using high-reliability capacitive coupling technology
• Features a 3/1 channel architecture supporting three forward and one reverse signal path
• Delivers high common-mode transient immunity to suppress noise in electrically noisy environments
• Supports bidirectional communication through unidirectional channel configurations

Applications

• Isolated analog input chains for space-constrained industrial applications
• Data bus isolation in systems utilizing isolated power supplies
• High-voltage measurement equipment requiring reinforced safety barriers
• Industrial automation controllers needing robust signal integrity

Procurement Notes

Verify the specific suffix 'F' indicates the required insulation rating and package variant. Confirm the 'W' suffix matches the SOIC-16 tape-and-reel packaging format. Ensure the order quantity aligns with the manufacturer's standard reel size requirements. Cross-reference the datasheet revision date to confirm compatibility with current design specifications.

Selection Notes

Select this component when reinforced isolation ratings are mandatory for safety compliance. Choose this part over lower-rated variants if the application demands higher common-mode transient immunity. Consider the 3/1 channel split if asymmetric signal routing is required. Verify that the operating voltage range meets the system's logic level requirements.

Part Context

This device belongs to the ISO7841 family of high-performance digital isolators. It shares the same core functionality as the ISO7841DWWR but differs in its specific insulation certification and physical package dimensions. The FDWR variant is optimized for applications requiring strict adherence to reinforced isolation standards while maintaining compact board space.

Replacement Considerations

The ISO7841DWWR serves as a functional alternative within the same family, offering similar performance characteristics. Verify that the replacement part meets the specific creepage distance and insulation thickness requirements of the original design.