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LC03-6 датащи(PDF) 4 Page - Semtech Corporation |
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LC03-6 датащи(HTML) 4 Page - Semtech Corporation |
4 / 9 page 4 ã 2000 Semtech Corp. www.semtech.com PROTECTION PRODUCTS LC03-6 Device Connection Options for Protection of Two High-Speed Data Lines The LC03-6 is designed to protect two high-speed data lines (one differential pair) from transient over-voltages which result from lightning and ESD. The device can be configured to protect in differential (Line-to-Line) and common (Line-to-Ground) mode. Data line inputs/ outputs are connected at pins 1 to 8, and 4 to 5 as shown. Pins 2, 3, 6, and 7 are connected to ground. These pins should be connected directly to a ground plane on the board for best results. The path length is kept as short as possible to minimize parasitic induc- tance. In applications where high common mode voltages are present, differential protection is achieved by leaving pins 2, 3, 6, and 7 not connected. T1/E1 Linecard Protection (Intra-Building) A typical T1/E1 linecard protection circuit is shown below. The LC03-6 is connected between Tip & Ring on the transmit and receive line pairs. It provides protection to metallic and common mode lightning surges per Bellcore 1089. This design takes advan- tage of the isolation of the transformer to suppress common mode surges. To complete the protection circuit, the SRDA05-4 (or SRDA3.3-4 for 3.3V supplies) is employed as the IC side protection element. This device helps prevent the transceiver from latching up by providing fine clamping of transients that are coupled through the transformer. For further informa- tion, reference Semtech application note AN97-10 Connection for Differential (Line-to-Line) and Common Mode Protection (Line-to-Ground) Connection for Differential Protection (Line-to-Line) Applications Information T3/E3 & STS-1 Protection The LC03-6 can also be used to protect T3/E3 and STS-1 interfaces. The data lines from the BNC inter- face are run through the LC03-6 (i.e. enters at pin 1 and exits at pin 8) with the ground connection made at the other side of the device (pins 4 & 5). The center pins (2, 3, 6, and 7) are not connected. In this configu- ration, the LC03-6 adds less than 12pF of capacitance to each line and provides surge protection to 100A (tp=8/20ms). |
Аналогичный номер детали - LC03-6 |
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Аналогичное описание - LC03-6 |
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