ISO7742DBQR

Overview

The ISO7742DBQR is a quad-channel digital isolator from the ISO7742 series, manufactured by Texas Instruments. It utilizes capacitive coupling technology to provide electrical isolation between circuits. The device features four unidirectional channels, split into two forward and two reverse paths. Key electrical specifications include a data rate of 100 Mb/s, an insulation voltage of 2500 Vrms, and a maximum propagation delay of 10.7 ns. It operates within a supply voltage range of 2.25 V to 5.5 V, with a typical operating current of 13.4 mA. The component is housed in an SSOP-16 package and supports a wide operating temperature range from -55°C to +125°C.

Feature Summary

• Provides robust electromagnetic compatibility (EMC) performance for signal integrity in noisy environments.
• Offers reinforced insulation capabilities suitable for safety-critical applications requiring high isolation ratings.
• Features low pulse width distortion for accurate digital signal transmission across the isolation barrier.

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced isolation barriers
• Power metering and energy management systems

Procurement Notes

Verify the specific suffix 'DBQR' corresponds to the SSOP-16 package and reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation or certified datasheets before integration. Ensure the procurement source provides valid traceability for the Texas Instruments manufacturing lot. Check for any updated revision levels that may affect pinout or electrical characteristics compared to legacy versions.

Selection Notes

Select this component when a quad-channel unidirectional isolator with reinforced insulation is required. It is suitable for designs needing high common-mode transient immunity and operation over extended industrial temperature ranges. Consider the SSOP-16 footprint constraints and the 100 Mb/s data rate limit against system requirements. Compare power consumption and propagation delay specifications against other isolator families if lower latency or bidirectional functionality is needed.

Part Context

This part belongs to the ISO774x family of high-speed digital isolators. It shares architectural similarities with other members like the ISO7741 and ISO7743, differing primarily in channel count and directionality. The ISO7742 specifically addresses applications requiring four isolated channels with unidirectional signal flow, distinguishing it from bidirectional variants in the same series.

Replacement Considerations

Direct replacements within the same family include ISO7742D and ISO7742DW for different package options. Automotive-grade equivalents such as ISO7742FQDBQRQ1 offer similar electrical performance but with AEC-Q100 qualification and a restricted operating temperature range starting at -40°C. Verify package compatibility and insulation ratings when substituting.