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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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P6002ACMC датащи(PDF) 104 Page - Teccor Electronics |
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P6002ACMC датащи(HTML) 104 Page - Teccor Electronics |
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104 / 212 page  High Speed Transmission Equipment http://www.teccor.com 3 - 16 © 2002 Teccor Electronics +1 972-580-7777 SIDACtor® Data Book and Design Guide Additional T1 Design Considerations A T1 application can be TIA-968 approved as two different possible device types. An XD device means an external CSU is used and the unit does not have to meet the TIA-968 environmental test conditions, but it must connect only behind a separately registered DE device. This XD equipment does not have to meet the T1 pulse template requirements. If not classified as an XD device, then typically the application must adhere to TIA-968 environmental test conditions. T3 Protection The capacitance across the pair of wires = (D1 || D2) + P0640EC/SC. The diode capacitance is approximately (10 pF || 10 pF) 20 pF. Then adding the capacitive effect of the P0640EC/SCMC, which is typically 60 pF, the total capacitance across the pair of wires is approximately 15 pF. The MUR 1100E diodes are fast-switching diodes that will exhibit this level of capacitance. MURS160T3 is a surface mount equivalent. (Figure 3.18) Figure 3.18 T3 Protection Alternately, the advanced P0642SA exhibits very low capacitance and can be used as a stand-alone device. Figure 3.19 Alternate T3 Protection P0640EC/SC MC or P0720EC/SC MC D1 D2 F1250T P0642SA |
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