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M54HC251K1 Datasheet(PDF) 5 Page - STMicroelectronics |
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M54HC251K1 Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 10 page M54HC251 5/10 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr =tf =6ns) CAPACITIVE CHARACTERISTICS 1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) =CPD xVCC xfIN +ICC Symbol Parameter Test Condition Value Unit VCC (V) TA = 25°C -40 to 85°C -55 to 125°C Min. Typ. Max. Min. Max. Min. Max. tTLH tTHL Output Transition Time 2.0 30 75 95 115 ns 4.5 8 15 19 23 6.0 7 13 16 20 tPLH tPHL Propagation Delay Time (D - Y, W) 2.0 64 130 165 195 ns 4.5 16 26 33 39 6.0 14 22 28 33 tPHL Propagation Delay Time (A, B, C -Y, W) 2.0 80 160 200 240 ns 4.5 20 32 40 48 6.0 17 27 34 41 tPZL tPZH High Impedance Output Enable Time 2.0 RL =1 KΩ 36 90 115 135 ns 4.5 11 18 23 27 6.0 9 15 20 23 tPLZ tPHZ High Impedance Output Disable Time 2.0 RL =1 KΩ 26 85 105 130 ns 4.5 13 17 21 26 6.0 11 14 18 22 Symbol Parameter Test Condition Value Unit VCC (V) TA = 25°C -40 to 85°C -55 to 125°C Min. Typ. Max. Min. Max. Min. Max. CIN Input Capacitance 5.0 5 10 10 10 pF CPD Power Dissipation Capacitance (note 1) 5.0 62 pF |
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