ISO6521FDR

Overview

The ISO6521FDR is a dual-channel digital isolator from Texas Instruments, housed in an 8-SOIC package. It supports unidirectional data transmission at rates up to 50 Mb/s with a propagation delay of 11 ns. The device operates on supply voltages between 1.71 V and 5.5 V and provides functional isolation via capacitive coupling. It features an insulation voltage of 707 Vrms and a common-mode transient immunity of 100 kV/µs. Operating temperatures range from -40°C to +125°C.

Feature Summary

• Dual-channel CMOS output functional isolators
• Robust SiO2 isolation barrier with high common-mode transient immunity
• Support for 1.8V logic levels

Applications

• CAN bus interfaces
• RS232 communication links
• RS485 data transmission systems
• SPI peripheral isolation

Procurement Notes

Verify the suffix 'FDR' corresponds to the SOIC-8 tape-and-reel packaging configuration. Confirm that the specific revision level matches your design requirements. Ensure compatibility with the intended supply voltage range of 1.71 V to 5.5 V. Check for moisture sensitivity labeling if storage conditions are critical. Validate that the 100 kV/µs CMTI rating meets the noise environment specifications of the target application.

Selection Notes

Select this component when galvanic isolation is required for bidirectional or unidirectional digital signals in compact designs. It is suitable for applications demanding low power consumption and small footprint. Consider the 50 Mbps speed limit for high-speed data lines. Evaluate the 707 Vrms insulation capability against system safety standards. Ensure the operating temperature range covers the environmental extremes of the deployment site.

Part Context

This part belongs to the ISO652x family of general-purpose dual-channel functional isolators. It complements other variants like the ISO6521DR by offering specific packaging options. The series is designed for industrial and commercial applications requiring reliable signal transmission across isolated boundaries without compromising data integrity.

Replacement Considerations

Direct substitutes include other ISO652x variants such as ISO6521DR, which shares identical electrical characteristics but may differ in reel packaging specifications. Verify pinout compatibility before substitution.