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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PC87373 датащи(PDF) 158 Page - National Semiconductor (TI) |
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PC87373 датащи(HTML) 158 Page - National Semiconductor (TI) |
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158 / 174 page  13.0 Device Characteristics (Continued) 158 www.national.com Revision 1.1 13.4 AC ELECTRICAL CHARACTERISTICS 13.4.1 AC Test Conditions Figure 46. AC Test Conditions, TA =0°Cto70°C, VSUP = 3.3V ±10% Notes: 1. VSUP is either VDD3 or VSB3, according to the pin power well. 2. CL = 50 pF for all output pins except the following pin groups: − CL = 100 pF for Serial Port 1 and 2 pins (see Section 1.4.2 on page 17), Parallel Port pins (see Section 1.4.3) and Floppy Disk Controller pins (see Section 1.4.4) − CL = 40 pF for IDE_RSTDRV pin − CL = 400 pF for SMBus pins (see SMBus Voltage Translation and Isolation Timing on page 172) These values include both jig and oscilloscope capacitance. 3. S1 = Open − for push-pull output pins. S1 = VSUP − for high-impedance to active low and active low to high impedance transition measurements S1 = GND − for high-impedance to active high and active high to high impedance transition measurements RL = 1.0 KΩ− for all the pins 4. For the FDC open-drain interface pins, S1 = VDD3 and RL = 150Ω. Device Under Test 0.1 µf Input Output RL CL S1 Load Circuit AC Testing Input, Output Waveform VSUP 2.4 0.4 2.0 0.8 Test Points 2.0 0.8 (unless otherwise specified) |
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