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M74HC74 Datasheet(PDF) 5 Page - STMicroelectronics |
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M74HC74 Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 12 page M74HC74 5/12 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/2 (per FLIP/ FLOP) 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 95 110 ns 4.5 8 151922 6.0 7 131619 tPLH tPHL Propagation Delay Time (CK - Q, Q) 2.0 48 150 190 225 ns 4.5 16 30 38 45 6.0 13 26 32 38 tPLH tPHL Propagation Delay Time (CLR, PR - Q, Q) 2.0 51 150 190 225 ns 4.5 17 30 38 45 6.0 15 26 32 38 fMAX Maximum Clock Frequency 2.0 6.2 21 5 4.2 MHz 4.5 31 63 25 21 6.0 37 67 30 25 tW(H) tW(L) Minimum Pulse Width (CK) 2.0 18 75 95 110 ns 4.5 6 151922 6.0 6 131619 tW(L) Minimum Pulse Width (CLR, PR) 2.0 21 75 95 110 ns 4.5 7 151922 6.0 6 131619 ts Minimum Set-up Time 2.0 15 75 95 110 ns 4.5 4 151922 6.0 3 131619 th Minimum Hold Time 2.0 0 0 0 ns 4.5 0 0 0 6.0 0 0 0 tREM Minimum Removal Time (CLR, PR to CK) 2.0 0 253035 ns 4.5 0 5 6 7 6.0 0 4 5 6 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 101010 pF CPD Power Dissipation Capacitance (note 1) 5.0 34 pF |
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