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LCDA15C-1TC 데이터시트(PDF) 4 Page - Semtech Corporation |
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LCDA15C-1TC 데이터시트(HTML) 4 Page - Semtech Corporation |
4 / 6 page 4 ã 2000 Semtech Corp. www.semtech.com PROTECTION PRODUCTS PROTECTION PRODUCTS LCDA12C-1 & LCDA15C-1 Applications Information Device Connection for Metallic Protection of High- Speed Data Lines The LCDAxxC-1 is designed to protect high-speed data lines from transient over-voltages which result from lightning and ESD. The device is designed to protect one line in common mode (Line-to-Ground) or one line pair in metallic (Line-to-Line) mode. For metallic mode protection, the input of line 1 is connected at pin 1 and the output is connected at pin 4. Likewise, the input of line 2 is connected at pin 2 and the output is con- nected at pin 3. For common mode protection, ground either pins 1 & 4 or pins 2 & 3. The ground connection should be made directly to the ground plane for best results. ADSL Protection A typical ADSL protection circuit is shown in Figure 3. The LCDA12C-1 (or LCDA15C-1 for 15 volt drivers) is connected from each line to ground on the IC side of the line. They provide lightning and ESD protection for the sensitive line driver IC. 1 2 3 4 Line In Line In Line Out Line Out Figure 1 - Connection for Differential Protection (Line-to-Line) 1 2 3 4 Line In Line Out Figure 2 - Connection for Common Mode Protection (Line-to-Ground) Figure 3 - ADSL Protection Circuit |
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