ISO1643DWR

Overview

The ISO1643DWR is a quad-channel digital isolator from Texas Instruments, housed in a 16-pin SOIC package. It supports bidirectional data transmission at speeds up to 50 Mb/s with a propagation delay of 60 ns. The device offers high isolation performance, rated at 6250 Vrms insulation voltage and 50 kV/µs common-mode transient immunity. Operating on a supply voltage between 2.25 V and 5.5 V, it draws typical currents of 4.8 mA and 9.3 mA per side. It functions reliably within an industrial temperature range of -40°C to +125°C.

Feature Summary

• Hot-swappable design simplifies system maintenance and upgrades without damaging connected circuits.
• Robust electromagnetic compatibility ensures reliable signal integrity in noisy environments.
• Bidirectional architecture allows flexible signal routing across isolated boundaries.

Applications

• Isolation for I2C communication buses
• Protection of sensitive electronics in high-voltage systems
• Industrial automation control interfaces

Procurement Notes

Verify the specific suffix 'DWR' confirms the SOIC-16 package and tape-and-reel shipping configuration. Confirm RoHS compliance status through official manufacturer documentation before integration. Ensure ESD handling protocols are followed due to moisture sensitivity classification. Cross-reference the datasheet revision date to ensure alignment with current design specifications.

Selection Notes

Select this component when bidirectional isolation is required for I2C or similar bus protocols. The 6250 Vrms rating suits applications demanding high dielectric strength. Consider the 60 ns propagation delay for timing-sensitive designs. Evaluate power consumption against available supply rails within the 2.25 V to 5.5 V operating window.

Part Context

This part belongs to the ISO1643 series of digital isolators. It shares the SOIC-16 footprint with other members like the ISO1644 but differs in channel directionality and feature sets. The series focuses on providing robust isolation for general-purpose digital signals in compact packages.

Replacement Considerations

Check for ISO1644 variants if unidirectional channels are acceptable. Verify pinout compatibility with existing PCB layouts before substituting. Ensure replacement parts maintain equivalent insulation voltage ratings for safety compliance.