ISOW7742DFMR

Overview

The ISOW7742DFMR is a quad-channel digital isolator from Texas Instruments, housed in a 20-pin SOIC package. It provides galvanic isolation with a maximum insulation voltage of 5000 Vrms and supports data rates up to 100 Mb/s. The device features unidirectional signal transmission with two forward and two reverse channels. Key electrical parameters include a propagation delay of 10.7 ns, rise time of 3.6 ns, and fall time of 3.5 ns. It operates within a supply voltage range of 2.97 V to 5.5 V, with power consumption specified at 5.4 mA and 16.7 mA for different channel configurations. The unit functions reliably across an operating temperature range of -40°C to +125°C.

Feature Summary

• Provides low-emissions and low-ripple performance for high-speed digital isolation
• Integrates four independent channels with unidirectional signal flow
• Features integrated shutdown control capability for power management
• Delivers high common-mode transient immunity via capacitive isolation technology

Applications

• Industrial automation systems requiring robust signal isolation
• Medical equipment needing enhanced safety isolation barriers
• Data acquisition modules for noisy industrial environments
• Power electronics interfaces for motor control applications

Procurement Notes

Verify the specific suffix 'DFMR' corresponds to the required tape-and-reel packaging format and moisture sensitivity level before ordering. Confirm that the 20-SOIC footprint matches the target PCB layout dimensions. Ensure the design accounts for the specified operating current variations across all active channels to maintain thermal stability within the rated temperature range.

Selection Notes

Select this component when high-density quad-channel isolation is required in a standard surface-mount package. It is suitable for designs prioritizing low electromagnetic interference due to its low-emission characteristics. Consider the 100 Mb/s data rate limit and 5000 Vrms isolation barrier when evaluating compatibility with system voltage levels and speed requirements.

Part Context

This part belongs to the ISOW774x series of quad-channel digital isolators. It complements other variants like the ISOW7741 by offering specific channel configurations and performance metrics tailored for general-purpose isolation needs. The series utilizes Texas Instruments' capacitive isolation technology to provide reliable signal transmission across isolation barriers.

Replacement Considerations

Direct functional equivalents may include other quad-channel isolators from the same family with matching pinouts and electrical specifications. Verify compatibility regarding insulation voltage ratings and data rates when substituting with similar components from alternative manufacturers or different product lines.