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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DP83848C датащи(PDF) 33 Page - National Semiconductor (TI) |
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DP83848C датащи(HTML) 33 Page - National Semiconductor (TI) |
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33 / 82 page  33 www.national.com 5.0 Design Guidelines 5.1 TPI Network Circuit Figure 11 shows the recommended circuit for a 10/100 Mb/s twisted pair interface. To the right is a partial list of recommended transformers. It is important that the user realize that variations with PCB and component character- istics requires that the application be tested to ensure that the circuit meets the requirements of the intended applica- tion. Pulse H1102 Pulse H2019 Pulse J0011D21 Pulse J0011D21B Figure 11. 10/100 Mb/s Twisted Pair Interface RJ45 RD- RD+ TD- TD+ RD- RD+ TD- TD+ 1:1 0.1µF* T1 1:1 COMMON MODE CHOKES MAY BE REQUIRED. 49.9 Ω 49.9 Ω 0.1µF* Vdd NOTE: CENTER TAP IS PULLED TO VDD *PLACE CAPACITORS CLOSE TO THE TRANSFORMER CENTER TAPS 0.1 µF All values are typical and are +/- 1% PLACE RESISTORS AND CAPACITORS CLOSE TO THE DEVICE. Vdd 49.9 Ω 49.9 Ω 0.1 µF Vdd |
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