ISO7420D

Overview

The ISO7420D is a low-power, dual-channel digital isolator manufactured by Texas Instruments. It utilizes capacitive coupling technology to provide electrical isolation between circuits. The device features two unidirectional channels with a data rate of 50 Mb/s and an insulation voltage of 2500 Vrms. It operates within a supply voltage range of 3.3 V to 5 V and supports a wide operating temperature range from -40°C to +125°C. The component is housed in an SOIC-8 surface-mount package.

Feature Summary

• Capacitive coupling isolation for robust signal transmission
• Low power consumption suitable for energy-efficient designs
• Wide operating temperature range for industrial environments

Applications

• Isolation between microcontrollers and data converters
• Interface isolation for line transceivers
• General-purpose digital isolation in industrial systems

Procurement Notes

Verify the specific suffix 'D' corresponds to the tube packaging configuration as indicated in official documentation. Confirm that the SOIC-8 package dimensions align with your PCB footprint requirements. Ensure the 3.3V to 5V supply voltage range matches your system design constraints before procurement.

Selection Notes

Select this component when bidirectional isolation is not required, as it offers only unidirectional channels. Consider the ISO7421 series if bidirectional communication capabilities are necessary for your application. Evaluate the 50 Mb/s data rate against your system's throughput requirements to ensure adequate performance margins.

Part Context

This part belongs to the ISO742x family of low-power dual-channel digital isolators. It serves as a general-purpose interface solution for separating noisy analog or digital domains. The device complements other isolators in the portfolio by offering a balance of speed and power efficiency.

Replacement Considerations

The ISO7420FED is documented as a parameter-equivalent substitute. Verify compatibility regarding packaging and thermal characteristics when considering alternative sources.