Implementing an Eight-to-One USB Switch for KVM Applications

Abstract: Many servers need to be able to switch video, keyboard, mouse, and perhaps audio signals from one of several computers to a front panel. This application note focuses on the keyboard/mouse portion, and presents a circuit for implementing an 8:1 USB switch with the MAX4999. By placing a hub at the MAX4999 output, the design ensures that anything connected to the hub will be slaved to only one source.