Silicon Protection Arrays Application Guide 1000/Gigabit Ethernet Considerations: ● 1000 relates to the data rate in Mbps (i.e. 1000Mbps) → For 1000Base-T data is transmitted over 4 UTP (unshielded twisted pairs) using a 125MHz clock ● For this data rate the parasitic capacitance should certainly be taken into account ● The 8 data lines below (Tx0:3 and Rx0:3) are being protected against lightning transients by a two stage protection scheme → The SP03 series (x4) should be used in place of the SPLV2.8-4 if higher levels of protection are required → The SP4060 series can be used in place of the SP3050 devices if the voltage does not exceed 2.5V Application Schematic: RJ-45 Connector *Package is shown as transparent SP3050 (x2) J1 NC Outside World NC Ethernet PHY SPLV2.8 (x2) J8 Case GND Case GND Recommended SPA Devices: SPLV2.8-4BTG ESD Level (Contact) ±30kV Lightning (tP=8/20μs) 24A I/O Capacitance 4pF # of Channels 4 SP3050-04HTG ±20kV 10A 2.4pF SP4060-08ATG ±30kV 20A 4.4pF Ordering Number ©2009 Littelfuse, Inc VRWM Packaging 2.8V SOIC-8 4 6V SOT23-6 8 2.5V MSOP-8 11