ISOW7740DFMR

Overview

The ISOW7740DFMR is a quad-channel digital isolator from Texas Instruments featuring galvanic isolation technology. It operates within a supply voltage range of 2.97 V to 5.5 V and supports data rates up to 100 Mb/s. The device provides an insulation voltage of 5000 Vrms with a common-mode transient immunity of 85 kV/µs. 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 consumes 14.6 mA of operating current and dissipates 1.48 W of power. The component functions in temperatures from -40°C to +125°C and includes a shutdown feature.

Feature Summary

• Galvanic isolation architecture for robust signal transmission
• Low electromagnetic emissions and reduced power supply ripple
• Integrated shutdown control for power management

Applications

• Industrial automation systems requiring high noise immunity
• Medical equipment needing reliable galvanic separation
• Automotive electronics interfaces

Procurement Notes

Verify the specific suffix DFMR confirms the SOIC-20 package and tape-and-reel orientation. Confirm RoHS compliance status through official manufacturer documentation. Ensure the procurement channel sources directly from authorized distributors to guarantee authenticity. Check for moisture sensitivity level requirements during storage and handling procedures.

Selection Notes

Select this component when galvanic isolation is required over capacitive types for lower emission profiles. The 20-pin SOIC package accommodates wider creepage distances compared to smaller footprints. Consider the 14.6 mA current consumption against system power budgets. Verify that the 100 Mb/s data rate meets application timing constraints.

Part Context

This part belongs to the ISOW7740 family of general-purpose digital isolators. It utilizes magnetic coupling technology distinct from the ISO7740 series which uses capacitive coupling. The family targets applications demanding low EMI and high reliability in noisy environments.

Replacement Considerations

The ISO7740DFMR is a functional pin-compatible alternative but uses capacitive isolation instead of galvanic isolation. Verify that the change in isolation technology does not impact EMI performance or system grounding strategies.