ISO7731FBDWR

Overview

The ISO7731FBDWR is a high-speed, triple-channel digital isolator from Texas Instruments, housed in a 16-pin SOIC package. It operates on a supply voltage range of 2.25 V to 5.5 V with a typical operating current of 13.1 mA. The device supports data rates up to 100 Mb/s and features unidirectional signal transmission across three channels (two forward, one reverse). It provides an isolation rating of 5000 Vrms and withstands surge voltages up to 12.8 kV. Key electrical parameters include a propagation delay of 11 ns, rise/fall times of 3.9 ns, and pulse width distortion of 600 ps. It functions within a temperature range of -55°C to +125°C.

Feature Summary

• Robust EMC performance with high common-mode transient immunity
• Capacitive coupling technology for reliable signal isolation
• Triple-channel configuration supporting mixed channel counts

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced insulation barriers
• Power metering applications with high-voltage separation needs

Procurement Notes

Verify the specific suffix 'F' indicates automotive qualification requirements when sourcing. Confirm the 'W' suffix corresponds to tape-and-reel packaging specifications. Ensure compatibility with RoHS directives and check for moisture sensitivity levels prior to surface-mount assembly processes.

Selection Notes

Select this component for designs requiring reinforced insulation ratings exceeding standard basic isolation limits. The 16-pin SOIC footprint offers a compact solution for space-constrained PCB layouts. Consider the 100 Mb/s data rate capability against system bandwidth requirements before finalizing the design choice.

Part Context

This part belongs to the ISO7731 family of digital isolators, designed for high-speed communication across isolation barriers. It utilizes capacitive coupling technology to transmit signals while blocking DC and low-frequency noise. The series is engineered for robustness in electrically noisy environments, ensuring signal integrity in critical industrial and medical applications.

Replacement Considerations

Direct replacements within the same family include ISO7731FDWR for non-automotive grade applications. Verify pinout compatibility and insulation voltage ratings when substituting with other triple-channel isolators.