ISO7420MDR

Overview

The ISO7420MDR is a low-power, dual-channel digital isolator from Texas Instruments. It provides galvanic isolation up to 2500 VRMS for one minute. The device supports signaling rates of 1 Mbps and features a typical propagation delay of 9 ns. It operates within a supply voltage range of 3.3 V to 5 V. The component is housed in an 8-SOIC package with a width of 3.90 mm. It offers common-mode transient immunity of 25 kV/µs and functions across a temperature range of -40°C to +125°C.

Feature Summary

• Provides galvanic isolation between circuits using capacitive coupling technology
• Supports bidirectional data transmission with unidirectional channel polarity
• Ensures signal integrity through high common-mode transient immunity

Applications

• Industrial automation systems requiring isolated communication interfaces
• Medical equipment needing safe patient isolation barriers
• Power electronics monitoring and control circuits

Procurement Notes

Verify the complete part number including the suffix to confirm the specific tape and reel packaging configuration. Ensure the order matches the required operating temperature range and insulation voltage specifications for the target application environment. Cross-reference the datasheet revision to confirm compatibility with existing design parameters.

Selection Notes

Select this component when low power consumption and dual-channel isolation are required. Consider the 1 Mbps data rate limit and 2500 VRMS isolation rating against system requirements. Evaluate the SOIC-8 footprint constraints and thermal performance needs within the specified operating temperature range.

Part Context

This device belongs to the ISO742x family of low-power dual-channel digital isolators. It shares architectural similarities with the ISO7420M and ISO7421 variants. The family utilizes capacitive isolation technology to provide robust signal transmission while maintaining electrical safety standards.

Replacement Considerations

Check for direct pin-compatible substitutes within the same manufacturer's portfolio that offer identical isolation ratings and package dimensions. Verify functional equivalence regarding propagation delay and power consumption before substitution.