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DS2155 Datasheet(PDF) 161 Page - Dallas Semiconductor |
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DS2155 Datasheet(HTML) 161 Page - Dallas Semiconductor |
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161 / 262 page  DS2156 161 of 262 Figure 23-4. Protected Interface Using Internal Receive Termination Note 1: All resistor values are ±1%. Note 2: X1 and X2 are very low DCR transformers. Note 3: C1 = 1µF ceramic. Note 4: S1 and S2 are 6V transient suppressers. Note 5: D1–D8 are Schottky diodes. Note 6: The optional fuses, F1–F4, prevent AC power line crosses from compromising the transformers. Note 7: The 68 mF is used to keep the local power-plane potential within tolerance during a surge. TTIP TRING RTIP RRING DVDD TVDD RVDD VDD VDD DVSS TVSS RVSS DS2156 68µF 2:1 1:1 D1 D2 D3 D4 C1 F1 F2 F3 F4 S1 0.1µF 0.1µF 0.1µF 0.01µF X1 X2 TRANSMIT LINE RECEIVE LINE 0.1µF 10µF 10µF + + + 0.1µF S2 60 60 VDD D5 D6 D7 D8 0.1µF |
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