Coupling of speakers with integrated circuit

A system comprising:

• first, second, and third pin interfaces;
• a first device coupled between the first and second pin interfaces;
• a second device that is coupled to the first pin interface and shares the first pin interface with the first device;
• a first driver circuit shared between the first pin interface and the third pin interface, wherein the first driver circuit includes a first combined cascode circuit including at least two cascode circuits to selectively drive the first pin interface or the third pin interface;
• a fourth pin interface and a second driver circuit shared between the second pin interface and the fourth pin interface, wherein the second driver circuit includes a second combined cascode circuit to selectively drive one of the second pin interface and the fourth pin interface;
• a third device, wherein the second device is coupled to the fourth pin interface and shares the fourth pin interface with the third device;
• wherein the first device is a low power speaker, the second device is a high power speaker and the third device is an earphone speaker coupled to the mobile device.