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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) 110 Page - National Semiconductor (TI) |
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DP83256 датащи(HTML) 110 Page - National Semiconductor (TI) |
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110 / 144 page  70 Electrical Characteristics 71 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Conditions Min Typ Max Units VCC Supply Voltage b 05 70 V DCIN Input Voltage b 05 VCC a 05 V DCOUT Output Voltage b 05 VCC a 05 V VCC ESD to other VCC Maximum Voltage 03 V Differential Storage Temperature b 65 150 C ECL Signal Output Current b 50 mA ESD Protection 2000 V 72 RECOMMENDED OPERATING CONDITIONS Symbol Parameter Conditions Min Typ Max Units VCC Supply Voltage 475 525 V TA Operating Temperature 0 70 C FREF Reference Input Frequency 125 – 50 ppm 125 125 a 50 ppm MHz 73 RECOMMENDED EXTERNAL COMPONENTS Symbol Parameter Conditions Min Typ Max Units XTAL Crystal Specifications Center Frequency 125 MHz Frequency Calibration b 10 10 ppm Frequency Stability Over Temperature b 10 10 ppm Aging Less Than b 5 5 ppm Recommended Power Supply Bypassing Capacitor Value 01 m F Note Capacitors should be placed between each supply pair as close to the device as possible 74 DC ELECTRICAL CHARACTERISTICS The DC characteristics are specified over the Recommended Operating Conditions unless otherwise specified DC Electrical Characteristics for All TTL-Compatible Inputs The following signals are covered PHY Port Request Signals (ARD ARC ARP BRD BRC BRP) Phase Select (PH SEL) Reference Select (REF SEL) Sense Pins (SP) Cascade Start (CS) PMD Transmitter Enable Level (TEL) Device Reset (ERST) and Control Bus Interface Inputs (R EW ECE CBA) Symbol Parameter Conditions Min Typ Max Units VIH Input High Voltage 20 V VIL Input Low Voltage 08 V VIC Input Clamp Voltage IIN eb18 mA b 15 V IIL Input Low Current VIN e GND b 10 m A IIH Input High Current VIN e VCC a 10 m A 110 |
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