Silicon Protection Arrays Application Guide 10/100/1000 Ethernet (ESD only) Considerations: ● Some Ethernet ports only need be protected for ESD and not for lightning induced transients → These are sometimes referred to as “2M” ports or 2 Meter ports ● Parasitic capacitance should be taken into account especially for Gigabit Ethernet ● The 4 data lines below (Tx+/- and Rx+/-) are being protected against ESD by a low capacitance SP3002 which is suitable for all Ethernet data rates → In fact, any low capacitance SP30xx device is suitable for any “ESD only” Ethernet application Application Schematic: RJ-45 Connector Tx+ J1 TxOutside World Ethernet PHY Rx+ Rx- J8 NC Case GND Case GND SP3002 Recommended SPA Devices: SP3002-04JTG ESD Level (Contact) ±12kV Lightning (tP=8/20μs) 4.5A I/O Capacitance 0.85pF # of Channels 4 SP3003-04XTG ±8kV 2.5A 0.65pF SP3004-04XTG ±12kV 4A 0.85pF Ordering Number ©2009 Littelfuse, Inc VRWM Packaging 6V SC70-6 4 6V SOT563 4 6V SOT563 12