ISO1541DR

Overview

The ISO1541DR is a low-power bidirectional I2C digital isolator manufactured by Texas Instruments. It features two channels with capacitive coupling technology, providing 2500 Vrms insulation voltage and 25 kV/µs common-mode transient immunity. The device supports data rates up to 1 Mb/s with a propagation delay of 70 ns. Operating on a supply voltage range of 3 V to 5.5 V, it draws typical supply currents of 2.5 mA and 2.9 mA. It functions within an industrial temperature range of -40°C to +125°C and is housed in an 8-SOIC package.

Feature Summary

• Supports bidirectional I2C communication protocols for isolated data transfer
• Utilizes capacitive coupling for high noise immunity and functional isolation
• Provides robust protection against common-mode transients

Applications

• Isolated I2C bus interfaces in industrial automation systems
• Data acquisition systems requiring galvanic isolation
• Medical equipment with safety isolation requirements

Procurement Notes

Verify the specific suffix 'DR' corresponds to the tape-and-reel packaging configuration when ordering. Confirm that the 8-SOIC footprint matches the target PCB layout. Ensure the design accounts for the specified operating temperature range and supply voltage constraints to maintain signal integrity and compliance with isolation standards.

Selection Notes

Select this component for applications requiring bidirectional I2C isolation with low power consumption. It is suitable where standard SPI or GPIO isolators are insufficient due to protocol requirements. Consider the 2500 Vrms isolation rating and 25 kV/µs CMTI for environments with significant electrical noise or ground potential differences.

Part Context

The ISO1541DR belongs to the ISO154x family of low-power bidirectional I2C isolators from Texas Instruments. This series is designed to replace traditional transformer-based solutions, offering smaller form factors and lower power dissipation while maintaining reliable performance in noisy industrial environments.

Replacement Considerations

Public confirmed substitute part numbers include SI8602AB-B-ISR and SI8602AC-B-IS.