The document provides information about part number changes for Fairchild Semiconductor products that have been integrated into ON Semiconductor. Some Fairchild part numbers will need to change to meet ON Semiconductor's system requirements, as their systems do not support part names with underscores. The underscore in Fairchild part numbers will change to a dash. Users should check the ON Semiconductor website for updated part numbers. Any questions regarding the integration should be emailed to Fairchild_questions@onsemi.com.