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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DP83256 датащи(PDF) 113 Page - National Semiconductor (TI) |
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DP83256 датащи(HTML) 113 Page - National Semiconductor (TI) |
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113 / 144 page  70 Electrical Characteristics (Continued) DC Electrical Characteristics for All 100K ECL Compatible Inputs The following signals are covered PMD Indicate Data (PMID) Receive Clock In (RXC IN) Receive Data In (RXD IN) and Signal Detect (SD) Symbol Parameter Conditions Min Typ Max Units VDIFF Input Voltage Differential (Note 1) 150 mV VCM Common Mode Voltage VDIFF e 300 mV VCC b 20 VCC b 05 V (Notes 1 2) IIN Input Current VIN e VCC or GND b 200 200 m A Note 1 Both inputs of each differential pair are tested together These specifications guarantee that the inputs are compatible with standard 100K ECL voltage level outputs Note 2 VCM is measured from the crossover point of the 300 mV differential test input DC Electrical Characteristics for 100K ECL Compatible Outputs The following signals are covered PMD Request Data (PMRD) and Transmit Clock (TXC) Symbol Parameter Conditions Min Typ Max Units VOH Output High Voltage VIL e VCC b 1810 VCC b 1025 VCC b 0880 V VOL Output Low Voltage VIH e VCC b 0880 VCC b 1810 VCC b 1620 V DC Electrical Characteristics for Alternate PMD ECL Outputs The following signals are covered Receive Clock Out (RXC OUT) and Receive Data Out (RXD OUT) Symbol Parameter Conditions Min Typ Max Units VOH Output High Voltage VIL e VCC b 1810 VCC b 1155 VCC b 0880 V VOL Output Low Voltage VIH e VCC b 0880 VCC b 1810 VCC b 1550 V (Note 3) Note 3 It is recommended that RXC OUTa and RXC OUTb always be used together as a differential pair It is recommended that RXD OUTa and RXD OUTb always be used together as a differential pair Supply Current Electrical Characteristics Symbol Parameter Conditions Min Typ Max Units ICC Total Supply LBC1 e 125 MHz 350 mA ECL ICC ECL Supply Current LBC1 e 125 MHz 200 mA ANALOG ICC ANALOG Supply Current LBC1 e 125 MHz 20 mA Note The PLAYERa device has multiple pairs of differential ECL outputs that need to be terminated The additional current needed for this termination is not included in the PLAYERa’s total supply current but can be calculated as follows VOH max e VCC b 088V VOL max e VCC b 162V Since the outputs are differential the average output level is VCC b 125V The test load per output is 50X at VCC b 2V therefore the external load current through the 50X resistor is ILOAD e (VCC b 125) b (VCC b 2) 50 e 0015A e 15 mA As a result the termination for each pair of active ECL outputs typically consumes 30 mA time averaged 113 |
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