High-speed serial data transmission allows designers to transmit highbandwidth data using differential, low-voltage swing signaling. One serial channel can support the same bandwidth as multiple conventional single-ended I/O standards, reducing the number of board traces and I/O pins. However, board traces, connectors, and backplane connections still introduce skew between multiple serial channels and between clock and data channels. To guarantee successful data transfer, tight specifications exist for the channel-to-channel skew and clock-to-channel skew.……