ISO7842FDW

Overview

The ISO7842FDW is a quad-channel digital isolator from Texas Instruments, housed in a 16-pin SOIC package. It utilizes capacitive coupling technology to provide signal isolation with a maximum insulation voltage of 5700 Vrms. The device supports data rates up to 100 Mb/s and features unidirectional channel configurations. It operates within a supply voltage range of 2.25 V to 5.5 V and functions reliably across an extended temperature range from -55°C to +125°C.

Feature Summary

• Provides high-reliability signal isolation using robust capacitive coupling architecture
• Supports high-speed data transmission with signaling rates up to 100 Mbps
• Enables flexible power domain separation through wide input/output supply voltage compatibility

Applications

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

Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and tape/reel specifications. Ensure compliance with RoHS directives and check humidity sensitivity levels before storage. Confirm that the selected variant matches the required isolation ratings and operating temperature range for the target application environment.

Selection Notes

Select this component when four isolated channels are required in a compact surface-mount footprint. Consider the 16-SOIC package dimensions for PCB layout constraints. Evaluate the 5700 Vrms insulation rating against system safety standards. Verify that the 100 Mbps data rate meets the communication speed requirements of the interface being isolated.

Part Context

This part belongs to the ISO784x family of digital isolators designed for general-purpose applications. It offers a balance of performance and reliability for industrial environments. The series provides various channel configurations and packaging options to suit different design needs while maintaining consistent isolation characteristics.

Replacement Considerations

Check for ISO7842FDWR as a reel-based alternative. Verify pinout compatibility with existing designs. Confirm that substitute parts meet the same 5700 Vrms insulation and 100 Mbps data rate specifications.