ISO7421DR

Overview

The ISO7421DR is a low-power dual digital isolator manufactured by Texas Instruments, housed in an 8-SOIC package. It features two unidirectional channels with a data rate of 1 Mbps and a propagation delay of 14 ns. The device provides 2500 Vrms isolation voltage and supports a supply voltage range of 3.15 V to 5.25 V. Operating temperatures span from -40°C to 105°C, with a typical power consumption of 2 mA per channel.

Feature Summary

• Provides galvanic isolation between circuits using capacitive coupling technology
• Supports high common-mode transient immunity for reliable signal transmission
• Enables bidirectional communication through independent input and output channels

Applications

• Industrial automation systems requiring isolated sensor interfaces
• Medical equipment needing patient isolation barriers
• Power electronics control circuits for gate drive isolation

Procurement Notes

Verify the specific suffix DR indicates tape-and-reel packaging when ordering. Confirm the operating temperature range matches application requirements. Ensure supply voltage compatibility with the 3.15 V to 5.25 V specification. Check for RoHS compliance status if environmental regulations apply.

Selection Notes

Select this component for applications requiring general-purpose digital isolation with moderate data rates. Consider the 8-SOIC package size for PCB layout constraints. Evaluate the 2500 Vrms isolation rating against system safety standards. Compare power consumption metrics with other isolators if energy efficiency is critical.

Part Context

This part belongs to the ISO7421 family of low-power digital isolators. It complements similar devices like the ISO7421D, differing primarily in packaging format. The series is designed for cost-effective isolation solutions in industrial and consumer electronics.

Replacement Considerations

ISO7421D is a parameter-equivalent alternative available in tube packaging. ADUM1201WSRZ-RL7 is another substitute option from Analog Devices. Verify pinout compatibility and electrical specifications before substitution.