поискавой системы для электроныых деталей |
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LC04-12TE датащи(PDF) 4 Page - Semtech Corporation |
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LC04-12TE датащи(HTML) 4 Page - Semtech Corporation |
4 / 8 page 4 ã 2000 Semtech Corp. www.semtech.com PROTECTION PRODUCTS LC04-12 Figure 1 - Connection for Differential (Line-to-Line) Protection of two Tip/Ring Line Pairs TIP 1 TIP 2 RING 1 RING 2 Device Connection Options The LC04-12 is designed to protect up to four high- speed data lines (two differential pairs) from transient over-voltages which result from lightning and ESD. Differential protection of two line pairs is achieved by connecting the device as follows (Figure 1): 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). Common mode protection of one line pair is achieved by connecting the device as shown in Figure 2. The protected lines are connected at pins 1-4 and pins 9- 12. connection to ground is made at pins 5-8 and 13- 16. optionally, the lines may be connected at pins 1-4 and 5-8 with pins 9-16 being connected to ground. 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 LC04-12 as short as possible. Ground con- nections should be made directly to the ground plane. ADSL Protection Configuring The LC04-12 for Remote Terminal ADSL Applications A typical ADSL protection circuit for remote terminals is shown in Figure 3. The LC04-12 is connected between Tip & Ring on the transmit and receive line pairs. It provides protection to common mode (line-to-ground) lightning and ESD surges. It is designed to meet the intra-building requirements of Bellcore GR-1089. To complete the protection circuit, the LCDA12C-1 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. Figure 2 - Connection for Common Mode (Line-to- Ground) Protection of one Tip/Ring Line Pair TIP GND GND RING Applications Information |
Аналогичный номер детали - LC04-12TE |
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Аналогичное описание - LC04-12TE |
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