ISOW7740FDFMR

Overview

The ISOW7740FDFMR is a quad-channel digital isolator from Texas Instruments, housed in a 20-pin SOIC (DFM) package. It features an integrated low-emissions, low-noise DC-DC converter and supports data rates up to 100 Mbps with a propagation delay of 10.7 ns. The device provides galvanic isolation with an insulation voltage of 5000 Vrms and operates within a temperature range of -40°C to +125°C. It draws 14.6 mA of operating power supply current and includes a shutdown function for power management.

Feature Summary

• Integrates a low-emissions, low-noise DC-DC converter optimized for CISPR 32 and EN standards
• Provides reinforced galvanic isolation with high common-mode transient immunity
• Includes a dedicated shutdown pin for effective power management

Applications

• Industrial automation systems requiring robust signal isolation
• Medical equipment needing enhanced safety isolation barriers
• Power metering applications with integrated power conversion needs

Procurement Notes

Verify the specific suffix FDFMR confirms the SOIC-20 package and tape-and-reel packaging format. Ensure the component meets required insulation ratings for your application's safety standards. Confirm availability through authorized distributors as lead times may vary based on production cycles.

Selection Notes

Select this model when four isolated channels are required alongside an integrated power source. Compare against ISOW7742 or ISOW7743 variants if bidirectional communication or different channel configurations are needed. Verify that the 100 Mbps data rate and 10.7 ns delay meet system timing requirements.

Part Context

This component belongs to the ISOW774x family of quad-channel digital isolators. These devices combine signal isolation with integrated power conversion to reduce external component count. The series is designed for applications demanding high reliability and electromagnetic compatibility in compact form factors.

Replacement Considerations

ISOW7742FDFMR offers similar specifications but lacks the shutdown feature. ISOW7743FDFMR provides bidirectional channels instead of unidirectional ones. Verify pinout compatibility and functional differences before substitution.