This application note will explain how to upgrade TAXI–275™ (Am79168/Am79169) devices with the HOTLink™ (CY7B923/CY7B933) devices from Cypress Semiconductor. It will aid in the migration of TAXI–275 designs to the HOTLink architecture. This note begins with an introduction to HOTLink and then gives advantages of HOTLink and replacement suggestions for the TAXI–275 devices.