ISO7742DWR

Overview

The ISO7742DWR is a quad-channel digital isolator from Texas Instruments, utilizing capacitive coupling technology for signal transmission. It features a 16-pin SOIC package with a 7.50mm width. The device supports unidirectional data flow across four channels, split as two forward and two reverse paths. It operates on a supply voltage range of 2.25V to 5.5V with a typical operating current of 13.4mA. Key electrical parameters include a data rate of 100Mb/s, an insulation voltage of 5000Vrms, and a common-mode transient immunity of 85kV/µs. Propagation delay is typically 10.7ns, with rise and fall times of 2.4ns. The component functions within a temperature range of -55°C to +125°C.

Feature Summary

• Provides robust electromagnetic compatibility (EMC) performance suitable for noisy industrial environments.
• Offers reinforced isolation capabilities ensuring safety compliance in high-voltage applications.
• Delivers high-speed data transmission with low propagation delay and minimal pulse width distortion.

Applications

• Industrial automation systems requiring galvanic isolation between microcontrollers and sensors.
• Power metering equipment needing precise signal separation across potential barriers.
• Inverter control circuits where reliable communication between isolated domains is critical.

Procurement Notes

Verify the specific revision level against the latest datasheet before procurement, as manufacturing sites or assembly locations may change without altering part numbers. Confirm that the SOIC-16 package dimensions match your PCB footprint requirements exactly. Ensure that the unidirectional channel configuration aligns with your circuit design needs, as bidirectional variants exist within the same family. Check for any recent product lifecycle notices regarding obsolescence or last-time buy dates.

Selection Notes

Select this component when high channel count and robust EMC immunity are required in a compact surface-mount package. It is suitable for designs needing 5000Vrms isolation strength with standard logic-level input/output voltages. Consider the 100Mb/s data rate limit; higher speeds require different series members. Evaluate the 13.4mA quiescent current against power budget constraints compared to lower-power alternatives in the ISO77xx family.

Part Context

The ISO7742DWR belongs to the ISO774x family of quad-channel digital isolators manufactured by Texas Instruments. This series is designed to replace traditional optocouplers in modern applications, offering superior performance in speed, power consumption, and size. The 'DWR' suffix indicates the tape-and-reel packaging format, distinguishing it from tube-packaged variants like the ISO7742DW. It shares core specifications with other members of the ISO774x series but differs primarily in packaging and minor timing characteristics.

Replacement Considerations

ISO7742DW serves as the tube-packaged equivalent with identical electrical specifications. For automotive applications, the ISO7742FQDWQ1 provides AEC-Q100 qualification with similar performance profiles. Direct pin-to-pin replacements within the same family include ISO7741DW (triple-channel) if one channel is redundant, though channel count differences must be accounted for in layout.