ISO7741TADWRQ1

Overview

The ISO7741TADWRQ1 is an automotive-grade, quad-channel reinforced digital isolator from Texas Instruments. It integrates a 160-kHz transformer driver for isolated power delivery. The device operates within a supply voltage range of 2.25 V to 5.5 V and supports data rates up to 100 Mb/s. Key electrical parameters include a propagation delay of 13 ns, rise/fall times of 3.9 ns, and a maximum power dissipation of 401 mW. It provides 1500 Vrms isolation rating and functions reliably across an operating temperature range of -40°C to +125°C.

Feature Summary

• Integrates a 160-kHz transformer driver to enable isolated power supply generation alongside signal isolation.
• Provides reinforced insulation capabilities suitable for demanding automotive safety applications.
• Features four independent channels with shutdown functionality for flexible system configuration.

Applications

• Automotive electronic control units requiring galvanic isolation
• On-board charging systems in electric vehicles
• Battery management systems with high-voltage isolation requirements

Procurement Notes

Verify the specific suffix 'TA' indicates the integrated transformer driver variant, distinct from standard isolators. Confirm AEC-Q100 qualification status for automotive compliance. Ensure the SOIC-16 package dimensions match the target PCB layout constraints. Check humidity sensitivity level (MSL) requirements for reflow soldering profiles during assembly.

Selection Notes

Select this component when both signal isolation and isolated power generation are required in a single package. The integrated transformer driver simplifies design by reducing external component count compared to solutions using separate isolated DC/DC converters. Consider the 100 Mb/s data rate limit and 1500 Vrms isolation rating against system voltage spikes and noise immunity needs.

Part Context

This part belongs to the ISO7741-Q1 family of automotive digital isolators. While the base ISO7741-Q1 offers robust EMC performance, the TA variant specifically adds the on-chip transformer driver. This distinguishes it from other variants like the ISO7741QDWRQ1, which lacks the integrated power stage but may offer different isolation ratings or pin configurations.

Replacement Considerations

ISO7741QDWRQ1 is a manufacturer-recommended alternative within the same family, though it lacks the integrated transformer driver.