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SLVU2.8-4.TB Datasheet(PDF) 4 Page - Semtech Corporation |
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SLVU2.8-4.TB Datasheet(HTML) 4 Page - Semtech Corporation |
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4 / 9 page  4 2008 Semtech Corp. www.semtech.com PROTECTION PRODUCTS SLVU2.8-4 SLVU2.8-4 Circuit Diagram Low Capacitance Protection of Two Differential Line Pairs Device Connection for Protection of Four Data Lines Electronic equipment is susceptible to transient distur- bances from a variety of sources including: ESD to an open connector or interface, direct or nearby lightning strikes to cables and wires, and charged cables “hot plugged” into I/O ports. The SLVU2.8-4 is designed to protect sensitive components from damage and latch- up which may result from such transient events. The SLVU2.8-4 can be configured to protect two high- speed line pairs. The device is connected as follows: 1. Protection of two high-speed line pairs: The SLVU2.8-4 is designed such that the data lines are routed through the device. The first line pair enters at pins 1 and 2 and exit at pins 8 and 7 respectively. The second line pair enters at pins 3 and 4 and exits at pins 6 and 5. The traces must be connected at the bottom of the device as shown. Circuit Board Layout Recommendations for Suppres- sion of ESD. Good circuit board layout is critical for the suppression of ESD induced transients. The following guidelines are recommended: Place the SLVU2.8-4 near the input terminals or connectors to restrict transient coupling. Minimize the path length between the TVS and the protected line. Minimize all conductive loops including power and ground loops. The ESD transient return path to ground should be kept as short as possible. Never run critical signals near board edges. Use ground planes whenever possible. Line 1 Line 3 Line 4 Line 2 1 2 3 45 6 7 8 Line 1 Line 3 Line 4 Line 2 Applications Information |
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