While the KSZ8081MNX/RNB and the DP83826A have many similarities, several extra features are included in the DP83826A, improving performance and system optimization. This system rollover document outlines how to replace the KSZ8081MNX/RNB PHY microchip with TI’s DP83826A by comparing differences including required external components, pin functions, feature set, and register operation. The impact to a design is dependent on the PHY configuration and features used.