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FC106 датащи(PDF) 18 Page - STMicroelectronics |
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FC106 датащи(HTML) 18 Page - STMicroelectronics |
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18 / 32 page ![]() FC106 Revision 1.2 18/32 September 98 5.3 DC characteristics The following values apply to the analog signals TX+, TX-, RX+ and RX- Table 5.3 DC characteristics for TX+, TX-, RX+ and RX- Note Values above are given with normal Zc setting. In accordance with Section 3.13, it is still possible to stay with 50 Ω internal control and connect the part to 75Ω impedance line by adding 25 Ω series resistances. Symbol Parameter Units Min. Typ Max. V OLS50 Serial output low level, terminated differen- tially by an external 100 Ω resistor ( Zc+ = Zc- = “open” ) V 0.90 1.05 1.20 V OHS50 Serial output high level, terminated differen- tially by an external 100 Ω resistor ( Zc+ = Zc- = “open” ) V 1.50 1.80 2.10 V OLS75 Serial output low level, terminated differen- tially by an external 150 Ω resistor ( Zc+ = “open” - Zc- = “Vss” ) V 0.90 1.05 1.20 V OHS75 Serial output high level, terminated differen- tially by an external 150 Ω resistor ( Zc+ = “open” - Zc- = “Vss” ) V 1.50 1.80 2.10 V OD50 Serial output peak-to-peak differential volt- age, terminated differentially by an external 100 Ω resistor ( Zc+ = Zc- = “open” ) V 1.20 1.50 1.80 V OD75 Serial output peak-to-peak differential volt- age, terminated differentially by an external 150 Ω resistor ( Zc+ =”open” - Zc- = “Vss” ) V 1.20 1.50 1.80 ROUT50 Internal differential output impedance. When 50 Ω line ( Zc+ = Zc- = “open” ) Ω 77 100 169 ROUT75 Internal differential output impedance. When 75 Ω line ( Zc+ =”open” - Zc- = “Vss” ) Ω 116 150 255 RIN50 Internal differential input impedance. When enabled for 50 Ω line ( Zc+ = Vss / Zc- = “open” ) Ω 59 100 183 RIN75 Internal differential output impedance. When enabled for 75 Ω line ( Zc+ = Zc- = Vss ) Ω 95 150 265 V ISWS Serial input peak-to-peak differential voltage on RX+ and RX- V0.2 - - |
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