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DM74LS390 Arkusz danych(PDF) 4 Page - Fairchild Semiconductor |
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DM74LS390 Arkusz danych(HTML) 4 Page - Fairchild Semiconductor |
4 / 6 page www.fairchildsemi.com 4 Switching Characteristics at VCC = 5V and TA = 25°C RL = 2 kΩ Symbol Parameter From (Input) CL = 15 pF CL = 50 pF Units To (Output) Min Max Min Max fMAX Maximum Clock A to QA 25 20 MHz Frequency B to QB 20 15 tPLH Propagation Delay Time A to QA 20 24 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time A to QA 20 30 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time A to QC 60 81 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time A to QC 60 81 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time B to QB 21 27 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time B to QB 21 33 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time B to QC 39 51 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time B to QC 39 54 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time B to QD 21 27 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time B to QD 21 33 ns HIGH-to-LOW Level Output tPHL Propagation Delay Time Clear to Any Q 39 45 ns HIGH-to-LOW Level Output |
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