ADUM1253ASA+T

Overview

The ADUM1253ASA+T is a two-channel digital isolator utilizing capacitive coupling technology. It provides one unidirectional and one bidirectional channel, designed specifically for I2C applications requiring data transmission in both directions. The device operates within a supply voltage range of 1.71V to 5.5V and features an isolation voltage of 3000Vrms. It supports a data rate of 2MHz with a propagation delay of 93.7ns. Operating temperatures range from -40°C to +125°C, and the typical operating supply current is 270uA.

Feature Summary

• Offers two open-drain channels configured as one unidirectional and one bidirectional path for flexible I2C communication.

Applications

• I2C bus isolation
• Bidirectional data transmission systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check current availability, as supply constraints may exist. Ensure the ordering suffix matches the required tape-and-reel packaging format for surface-mount assembly.

Selection Notes

Select this part when isolated I2C communication requires asymmetric channel configurations. The combination of unidirectional SCL and bidirectional SDA support addresses specific protocol needs. Consider the extended VDD capability and low VOL characteristics for robust signal integrity in noisy environments.

Part Context

This component belongs to the ADuM125x series of ultra-low-power digital isolators. It integrates capacitive coupling technology to provide galvanic isolation without requiring external transformer drivers. The series is optimized for applications demanding high reliability and low power consumption in compact SOIC-8 packages.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs before considering alternative components from the same manufacturer family.