ISO7342FCQDWRQ1

Overview

The ISO7342FCQDWRQ1 is an automotive-grade, low-power quad-channel digital isolator from Texas Instruments. It provides galvanic isolation with a 3000 Vrms insulation voltage and supports data rates up to 25 Mb/s. The device features unidirectional signal transmission across four channels (two forward, two reverse) within a 16-pin SOIC package. It operates on a supply voltage between 3 V and 5.5 V, drawing 6.4 mA of quiescent current. Key electrical parameters include a propagation delay of 31 ns, rise time of 2.8 ns, fall time of 2.1 ns, and pulse width distortion of 4 ns. It withstands a common-mode transient immunity of 25 kV/µs and functions reliably within a temperature range of -40°C to +125°C.

Feature Summary

• Provides robust electromagnetic compatibility performance suitable for demanding automotive environments
• Delivers high-speed digital signal transmission with low power consumption characteristics
• Ensures reliable galvanic isolation with high common-mode transient immunity capabilities

Applications

• Automotive electronic control units requiring isolated communication interfaces
• Inverter gate drive circuits in electric vehicle powertrains
• Isolated data acquisition systems in industrial automotive testing equipment

Procurement Notes

Verify the complete part number including suffixes to ensure correct packaging and automotive qualification status. Confirm that the specific variant matches the required thermal grade and channel configuration. Cross-reference the manufacturer datasheet revision against the ordered component lot to ensure compliance with current specifications. Validate that the supplier provides authentic Texas Instruments products with traceable documentation.

Selection Notes

Select this component when designing systems requiring certified automotive reliability alongside low power dissipation. The quad-channel architecture reduces board space compared to discrete dual-channel solutions. Ensure the application voltage levels align with the 3 V to 5.5 V operating range. Consider the SOIC-16 package dimensions for PCB layout constraints and verify thermal management requirements for the specified power dissipation levels.

Part Context

This device belongs to the ISO734x-Q1 family of digital isolators designed specifically for automotive applications. It complements other Texas Instruments interface solutions by offering integrated isolation without external magnetic components. The series emphasizes EMC robustness and energy efficiency, addressing the increasing complexity of modern vehicle electronics networks and power management systems.

Replacement Considerations

ISO7342CQDWRQ1: Non-FDA compliant version with identical electrical specifications and pinout.

FAQ

Does the ISO7342FCQDWRQ1 support bidirectional data transmission?

No, the device is configured for unidirectional signal transmission only.

What is the maximum common-mode transient immunity rating?

The component offers a common-mode transient immunity of 25 kV/µs.