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DM74LS74A Scheda tecnica(PDF) 3 Page - Fairchild Semiconductor |
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DM74LS74A Scheda tecnica(HTML) 3 Page - Fairchild Semiconductor |
3 / 6 page 3 www.fairchildsemi.com Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Note 7: All typicals are at VCC = 5V, TA = 25°C. Note 8: 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 = 2.125V with the minimum and maximum limits reduced by one half from their stated values. This is very useful when using automatic test equipment. Note 9: With all outputs OPEN, ICC is measured with CLOCK grounded after setting the Q and Q outputs HIGH in turn. Switching Characteristics at VCC = 5V and TA = 25°C Symbol Parameter Conditions Min Typ Max Units (Note 7) VI Input Clamp Voltage VCC = Min, II = −18 mA −1.5 V VOH HIGH Level VCC = Min, IOH = Max 2.7 3.4 V Output Voltage VIL = Max, VIH = Min VOL LOW Level VCC = Min, IOL = Max 0.35 0.5 Output Voltage VIL = Max, VIH = Min V IOL = 4 mA, VCC = Min 0.25 0.4 II Input Current @ Max VCC = Max Data 0.1 Input Voltage VI = 7V Clock 0.1 mA Preset 0.2 Clear 0.2 IIH HIGH Level VCC = Max Data 20 Input Current VI = 2.7V Clock 20 µA Clear 40 Preset 40 IIL LOW Level VCC = Max Data −0.4 Input Current VI = 0.4V Clock −0.4 mA Preset −0.8 Clear −0.8 IOS Short Circuit Output Current VCC = Max (Note 8) −20 −100 mA ICC Supply Current VCC = Max (Note 9) 4 8 mA From (Input) RL = 2 kΩ Symbol Parameter To (Output) CL = 15 pF CL = 50 pF Units Min Max Min Max fMAX Maximum Clock Frequency 25 20 MHz tPLH Propagation Delay Time Clock to Q or Q 25 35 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time Clock to Q or Q 30 35 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time Preset to Q 25 35 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time Preset to Q 30 35 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time Clear to Q 25 35 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time Clear to Q 30 35 ns HIGH-to-LOW Level Output |
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