ISO7041FDBQ

Overview

The ISO7041FDBQ is a four-channel digital isolator from Texas Instruments, designed for ultra-low power applications. It utilizes dual-capacitor SiO2 insulation to isolate CMOS or LVCMOS digital I/O signals. The device supports bidirectional and unidirectional data rates up to 4 Mbps. Key electrical parameters include a maximum supply voltage of 5.5 V and a minimum of 2.25 V. Dynamic current consumption is below 120 µA/Mbps per channel, with a static current of 4.2 µA per channel at 3.3 V. Propagation delays are specified at 140 ns and 148 ns. It offers a 3000 Vrms isolation rating compliant with UL1577 standards.

Feature Summary

• Ultra-low power architecture suitable for thermally constrained designs
• Robust capacitive coupling using dual-capacitor SiO2 insulation
• Supports both bidirectional and unidirectional signal transmission
• Complies with UL1577 safety standards for reinforced isolation

Applications

• Isolation of CMOS or LVCMOS digital I/O interfaces
• Power and heat-limited system designs
• General-purpose digital signal isolation

Procurement Notes

Verify the specific suffix (e.g., FDBQ) against the datasheet to confirm package type and tape/reel specifications. Ensure compatibility with required isolation ratings and operating temperature ranges. Confirm moisture sensitivity levels and reflow soldering profiles prior to assembly. Cross-reference ordering part numbers with manufacturer documentation to avoid substitution errors.

Selection Notes

Select this component when low dynamic and static power consumption are critical constraints. Verify that the required data rate does not exceed 4 Mbps. Ensure the application requires 3000 Vrms isolation rather than higher ratings found in other series. Check if bidirectional functionality is needed, as some variants may be unidirectional only.

Part Context

This device belongs to the ISO7041 family of ultra-low power digital isolators. It shares architectural similarities with other Texas Instruments isolators but distinguishes itself through optimized power efficiency. The SSOP-16 package provides a compact footprint for multi-channel isolation needs.

Replacement Considerations

ISO7041FDBQR is the reel variant of this component. Other ISO7041 variants may differ in polarity or packaging. Verify functional equivalence before substituting.