ISO1541D

Overview

The ISO1541D is a low-power, bidirectional digital isolator compatible with I2C interfaces. It features two channels with capacitive coupling isolation technology. The device supports data rates up to 1 Mb/s and operates within a supply voltage range of 3 V to 5.5 V. Key electrical parameters include an insulation voltage of 2500 Vrms, propagation delay of 70 ns, and operating currents of 2.5 mA and 2.9 mA. It functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Bidirectional signal transmission capability for I2C bus isolation
• Low-power consumption design suitable for energy-efficient systems
• High insulation voltage rating for robust safety isolation

Applications

• I2C bus isolation in industrial control systems
• SMBus interface protection in embedded devices
• Isolating microcontrollers from peripheral sensors

Procurement Notes

Verify the specific suffix (DR vs D) as it denotes package type (Reel vs SOIC-8). Confirm availability status as some variants may be obsolete. Ensure compatibility with existing PCB footprint and reflow soldering profiles. Check for moisture sensitivity level requirements during storage and handling.

Selection Notes

Select this component when bidirectional I2C isolation is required with low power constraints. Consider the SOIC-8 package size for space-limited designs. Verify that the 1 Mbps data rate meets system timing requirements. Ensure the 2500 Vrms isolation rating satisfies safety standards for the application environment.

Part Context

Part of the ISO154x family of low-power bidirectional I2C isolators by Texas Instruments. Designed specifically for isolating I2C and SMBus interfaces while maintaining signal integrity. Offers a compact solution for noise reduction and ground loop elimination in mixed-signal systems.

Replacement Considerations

ISO1541DR is listed as an available substitute variant. Verify pinout and electrical specifications match before substitution. Check if the DR suffix indicates tape-and-reel packaging which may affect assembly processes.