ISO7240CFDWR

Overview

The ISO7240CFDWR is a quad-channel digital isolator from Texas Instruments, utilizing capacitive coupling technology. It provides 2500 Vrms isolation voltage and supports data rates up to 25 Mbps. The device features a 4/0 channel configuration with unidirectional signal paths. It operates within a supply voltage range of 3.15V to 5.5V and functions across an industrial temperature range of -40°C to 125°C. Key electrical specifications include a maximum propagation delay of 42ns, a typical rise/fall time of 2ns, and a common-mode transient immunity (CMTI) of 25kV/µs. The component is housed in a 16-SOIC package.

Feature Summary

• Integrates four independent unidirectional channels for general-purpose digital isolation
• Provides high common-mode transient immunity to suppress noise in noisy environments
• Incorporates failsafe logic to ensure defined output states during input floating conditions
• Utilizes robust capacitive coupling for galvanic isolation without magnetic components

Applications

• Industrial automation systems requiring isolated communication interfaces
• Medical equipment needing reinforced or basic safety isolation
• Power electronics monitoring and control circuits
• General-purpose isolated digital signal transmission

Procurement Notes

Verify the specific suffix 'CF' indicates the inclusion of failsafe logic, which distinguishes this variant from standard ISO7240CDWR models. Confirm the 'W' suffix corresponds to the tape-and-reel packaging format required for automated assembly processes. Ensure compatibility with the target application's voltage levels and thermal requirements before finalizing procurement orders.

Selection Notes

Select this component when both high-speed data transmission at 25 Mbps and integrated failsafe functionality are required. The 2500 Vrms rating suits applications with moderate isolation needs compared to higher-rated counterparts like the ISO7840 series. Consider the 16-SOIC package dimensions for PCB layout constraints and verify that the unidirectional channel configuration aligns with the system's signal flow architecture.

Part Context

This part belongs to the ISO7240 family of high-speed quad digital isolators manufactured by Texas Instruments. It shares the same physical footprint and core isolation technology as variants like the ISO7240CDWR but adds specific functional enhancements such as failsafe outputs. The family is designed to replace traditional optocouplers in modern digital isolation applications.

Replacement Considerations

The ISO7240CDWR serves as a direct pin-compatible alternative if failsafe logic is not required. For applications demanding higher isolation ratings, consider the ISO7840 series. Verify that any substitute maintains the same SOIC-16 package and operational temperature range to ensure mechanical and environmental compatibility.