78Q8430 Layout Guidelines


The Teridian 78Q8430 is a 10BASE-T-/100BASE-TX-capable, Fast Ethernet media-access controller (MAC) and physical layer (PHY) transceiver. The PHY includes an analog front-end, which requires special considerations for printed-circuit board (PCB) layout. This application note provides the PCB layout recommendations to enhance the PHY performance and minimize electromagnetic compatibility (EMC) emissions. The circuit's performance is improved by careful consideration of analog signal routing and board design.