CPC5903G

Overview

The CPC5903G is a specialized optoisolated I2C repeater manufactured by IXYS Integrated Circuits Division. It provides galvanic isolation between I2C bus segments with a rated isolation voltage of 3750Vrms. The device supports dual channels and operates within a supply voltage range of 2.7V to 5.5V. Designed for surface-mount installation, it utilizes an 8-SMD package configuration. The component functions as a signal buffer to extend bus distance while maintaining protocol integrity across isolated boundaries.

Feature Summary

• Provides high-voltage galvanic isolation for I2C communication lines
• Supports bidirectional data transfer across isolated barriers
• Maintains I2C protocol compatibility without speed reduction

Applications

• Isolating I2C buses in industrial control systems
• Connecting microcontrollers to isolated sensor arrays
• Protecting sensitive logic circuits from ground loops

Procurement Notes

Verify the specific suffix against official documentation, as packaging variations such as tape-and-reel or tube formats may exist within the product family. Confirm current availability status directly with the manufacturer or authorized distributors, as production lifecycle changes can affect stock levels. Ensure that the procurement channel provides valid traceability and authenticity guarantees for integrated circuit components.

Selection Notes

Select this component when electrical isolation is required between I2C master and slave devices operating at different ground potentials. Verify that the system supply voltage falls within the 2.7V to 5.5V operational range. Consider the 8-SMD package dimensions for PCB layout constraints. Ensure the application does not exceed the specified isolation voltage ratings under any transient conditions.

Part Context

This part belongs to the CPC5903 series of special-purpose isolators designed specifically for I2C bus applications. Unlike general-purpose optocouplers, these devices are optimized for digital bus protocols, offering dedicated pinouts and internal circuitry tailored for clock and data line buffering. The series addresses the need for robust isolation in mixed-signal environments where standard optocouplers may introduce timing issues.

Replacement Considerations

Public confirmed substitute part numbers: CPC5903GS.