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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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XRT83VSH28IB датащи(PDF) 18 Page - Exar Corporation |
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XRT83VSH28IB датащи(HTML) 18 Page - Exar Corporation |
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18 / 74 page  XRT83VSH28 PRELIMINARY 15 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT REV. P1.0.0 TERSEL1 TERSEL0 T11 R11 I Termination Impedance Select Hardware Mode Only The TERSEL[1:0] pins are used to select the transmitter and receiver impedance. By default, the impedance is set to 100 Ω. "00" = Reserved "01" = Reserved "10" = 75 Ω "11" = 120 Ω NOTE: These pins are internally pulled "Low" with a 50k Ω resistor. TEST U12 I Factory Test Mode For normal operation, the TEST pin should be tied to ground. NOTE: Internally pulled "Low" with a 50k Ω resistor. ICT V12 I In Circuit Testing When this pin is tied "Low", all output pins are forced to "High" impedance for in cir- cuit testing. NOTE: Internally pulled "High" with a 50K Ω resistor. SIGNAL NAME BGA LEAD # TYPE DESCRIPTION |
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