поискавой системы для электроныых деталей |
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LC04-6TE датащи(PDF) 4 Page - Semtech Corporation |
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LC04-6TE датащи(HTML) 4 Page - Semtech Corporation |
4 / 7 page 4 ã 2000 Semtech Corp. www.semtech.com PROTECTION PRODUCTS LC04-06 Figure 1 - Connection for Differential (Line-to-Line) Protection of two Tip/Ring Line Pairs Device Connection Options for Protection of Two High-Speed Line Pairs The LC04-6 is designed to protect four high-speed data lines (two differential pairs) from transient over-volt- ages which result from lightning and ESD. Protection of two line pairs is achieved by connecting the device as follows: Pins 1-4 are connected to line 1 of the first pair (i.e. Tip 1) and pins 13-16 are connected to line 2 of the first pair (i.e. Ring 1). Pins 5-8 are connected to line 1 of the second pair (i.e. Tip 2) and pins 9-12 are connected to line two of the second pair (i.e. Ring 2). All pins should be connected for best results. Minimize parasitic inductance in the protection circuit path by keeping the trace length between the protected line and the LC04-6 as short as possible. T1/E1 Linecard Protection A typical T1/E1 linecard protection circuit is shown in Figure 2. The LC04-6 is connected between Tip & Ring on the transmit and receive line pairs. It provides protection to metallic (line-to-line) lightning and ESD surges. It is designed to meet the intra-building re- quirements of Bellcore GR-1089. This design takes advantage of the isolation of the transformer to suppress common mode surges. The LC04-6 may also be configured to meet metallic surges of FCC Part68 when used in conjunction with a 5W (minimum) PTC or line feed resistor (LFR). The PTC (or LFR + fuse) are required to meet the AC power cross requirements, but will also reduce the effective surge current to levels within the capability of the LC04-6 (Table 1). To com- plete 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. The versatility of the LC04-6 makes it ideal for use with combination long haul/short haul T1/E1 transceivers. TIP 1 TIP 2 RING 1 RING 2 Applications Information |
Аналогичный номер детали - LC04-6TE |
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Аналогичное описание - LC04-6TE |
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