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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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DM74LS74AM 데이터시트(PDF) 3 Page - National Semiconductor (TI) |
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DM74LS74AM 데이터시트(HTML) 3 Page - National Semiconductor (TI) |
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3 / 6 page  Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units (Note 1) VI Input Clamp Voltage VCC e Min II eb18 mA b 15 V VOH High Level Output VCC e Min IOH e Max DM54 25 34 V Voltage VIL e Max VIH e Min DM74 27 34 VOL Low Level Output VCC e Min IOL e Max DM54 025 04 Voltage VIL e Max VIH e Min DM74 035 05 V IOL e 4 mA VCC e Min DM74 025 04 II Input Current Max VCC e Max Data 01 Input Voltage VI e 7V Clock 01 mA Preset 02 Clear 02 IIH High Level Input VCC e Max Data 20 Current VI e 27V Clock 20 m A Clear 40 Preset 40 IIL Low Level Input VCC e Max Data b 04 Current VI e 04V Clock b 04 mA Preset b 08 Clear b 08 IOS Short Circuit VCC e Max DM54 b 20 b 100 mA Output Current (Note 2) DM74 b 20 b 100 ICC Supply Current VCC e Max (Note 3) 4 8 mA Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second For devices with feedback from the outputs where shorting the outputs to ground may cause the outputs to change logic state an equivalent test may be performed where VO e 225V and 2125V for DM54 and DM74 series respectively with the minimum and maximum limits reduced by one half from their stated values This is very useful when using automatic test equipment Note 3 With all outputs open ICC is measured with CLOCK grounded after setting the Q and Q outputs high in turn Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) From (Input) RL e 2kX Symbol Parameter To (Output) CL e 15 pF CL e 50 pF Units Min Max Min Max fMAX Maximum Clock Frequency 25 20 MHz tPLH Propagation Delay Time Clock to 25 35 ns Low to High Level Output Q or Q tPHL Propagation Delay Time Clock to 30 35 ns High to Low Level Output Q or Q tPLH Propagation Delay Time Preset 25 35 ns Low to High Level Output to Q tPHL Propagation Delay Time Preset 30 35 ns High to Low Level Output to Q tPLH Propagation Delay Time Clear 25 35 ns Low to High Level Output to Q tPHL Propagation Delay Time Clear 30 35 ns High to Low Level Output to Q 3 |
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