ISO1641DWR

Overview

The ISO1641DWR is a digital isolator from Texas Instruments designed for bidirectional I2C communication with a unidirectional clock. It features four channels in a 16-pin SOIC package. The device supports data rates up to 50 Mb/s and offers an insulation voltage of 5000 Vrms. Operating supply voltages range from 2.25 V to 5.5 V. Typical power consumption is 4.3 mA on the isolation side and 8.7 mA on the logic side. Propagation delay is 60 ns, with pulse width distortion of 60 ns. It operates within a temperature range of -40°C to +125°C.

Feature Summary

• Supports hot-swappable bidirectional I2C communication
• Features robust electromagnetic compatibility performance
• Includes a unidirectional clock channel

Applications

• Industrial automation systems
• I2C bus isolation in noisy environments
• Embedded systems requiring galvanic isolation

Procurement Notes

Verify the specific suffix 'DWR' indicates the SOIC-16 package and tape-and-reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets before procurement. Ensure ESD handling precautions are followed due to moisture sensitivity classification.

Selection Notes

Select this component when bidirectional I2C isolation with hot-swap capability is required. The unidirectional clock feature distinguishes it from fully bidirectional variants like the ISO1642. Consider the 5000 Vrms isolation rating and 50 Mb/s data rate for high-speed industrial applications. Evaluate power consumption requirements against the specified typical currents.

Part Context

This part belongs to the ISO164x family of digital isolators optimized for I2C interfaces. It complements other variants such as the ISO1642 (fully bidirectional) and ISO1643 (dual-directional). The family provides solutions for robust EMC performance in industrial settings. All parts share similar pinouts but differ in channel directionality and clock configurations.

Replacement Considerations

The ISO1642DWR serves as a functional substitute if bidirectional clock support is needed instead of unidirectional. Verify pin compatibility and isolation voltage ratings match system requirements. Check datasheet differences regarding propagation delay and power consumption between variants.