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M74HCT174B1R Fiches technique(PDF) 4 Page - STMicroelectronics |
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M74HCT174B1R Fiches technique(HTML) 4 Page - STMicroelectronics |
4 / 10 page M74HCT174 4/10 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 x VCC x fIN + ICC/6 (per FLIP/ FLOP) And the total CPD when N pcs of FLIP-FLOP operate can be gained by the following equation : CPD (total) = 38 + 15 x n 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 4.5 8 151922 ns tPLH tPHL Propagation Delay Time (CLOCK - Q) 4.5 18 28 35 ns tPLH tPHL Propagation Delay Time (CLEAR - Q) 4.5 18 28 35 42 ns fMAX Maximum Clock Frequency 4.5 30 56 24 MHz tW(H) tW(L) Minimum Pulse Width (CLOCK) 4.5 8 151922 ns tW(L) Minimum Pulse Width (CLEAR) 4.5 8 151922 ns ts Minimum Set-up Time 4.5 2 101315 ns th Minimum Hold Time 4.5 5 6 8 ns tREM Minimum Removal Time 4.5 5 5 5 5 ns 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 101010 pF CPD Power Dissipation Capacitance (note 1) 68 pF |
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