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IN74HC251A Datasheet(PDF) 4 Page - IK Semicon Co., Ltd |
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IN74HC251A Datasheet(HTML) 4 Page - IK Semicon Co., Ltd |
4 / 6 page IN74HC251A AC ELECTRICAL CHARACTERISTICS (CL=50pF,Input tr=tf=6.0 ns) VCC Guaranteed Limit Symbol Parameter V 25 °C to -55 °C ≤85°C ≤125°C Unit tPLH, tPHL Maximum Propagation Delay, Input D to Output Y or Y (Figures 1,2 and 5) 2.0 4.5 6.0 185 37 31 230 46 39 280 56 48 ns tPLH, tPHL Maximum Propagation Delay , Input A to Output Y or Y (Figures 3 and 5) 2.0 4.5 6.0 205 41 35 255 51 43 310 62 53 ns tPLZ, tPHZ Maximum Propagation Delay , Output Enable to Output Y (Figures 4 and 6) 2.0 4.5 6.0 195 39 33 245 48 42 295 59 50 ns tPZL, tPZH Maximum Propagation Delay , Output Enable to Output Y (Figures 4 and 6) 2.0 4.5 6.0 145 29 25 180 36 31 220 44 38 ns tPLZ, tPHZ Maximum Propagation Delay , Output Enable to Output Y (Figures 4 and 6) 2.0 4.5 6.0 220 44 37 275 55 47 330 66 56 ns tPZL, tPZH Maximum Propagation Delay , Output Enable to Output Y (Figures 4 and 6) 2.0 4.5 6.0 150 30 26 190 38 33 225 45 38 ns tTLH, tTHL Maximum Output Transition Time, Any Output (Figures 1 and 6) 2.0 4.5 6.0 75 15 13 95 19 16 110 22 19 ns CIN Maximum Input Capacitance - 10 10 10 pF COUT Maximum Three-State Output Capacitance (Output in High-Impedance State) - 15 15 15 pF Power Dissipation Capacitance (Per Package) Typical @25 °C,V CC=5.0 V CPD Used to determine the no-load dynamic power consumption: PD=CPDVCC 2f+I CCVCC 36 pF Figure 1. Switching Waveforms Figure 2. Switching Waveforms Rev. 00 |
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