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M74HCT273TTR Scheda tecnica(PDF) 4 Page - STMicroelectronics |
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M74HCT273TTR Scheda tecnica(HTML) 4 Page - STMicroelectronics |
4 / 10 page M74HCT273 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/8 (per FLIP FLOP), and the total CPD when n pcs of FLIP FLOP operate can be gained by the following equations: CPD (total) = 32 + 11 x n Symbol Parameter Test Conditions 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 9 151922 ns tPLH tPHL Propagation Delay Time (CLOCK - Q) 4.5 19 30 38 45 ns tPHL Propagation Delay Time (CLEAR - Q) 4.5 22 32 40 48 ns fMAX Maximum Clock Frequency 4.5 30 80 24 20 MHz tW(H) tW(L) Minimum Pulse (CLOCK) 4.5 7 151922 ns tW(L) Minimum Pulse (CLEAR) 4.5 7 151922 ns ts Minimum Set-Up Time 4.5 4 151922 ns th Minimum Hold Time 4.5 0 0 0 ns tREM Minimum Removal Time (CLEAR) 4.5 4 101315 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 5.0 5 101010 pF CPD Power Dissipation Capacitance (note 1) 5.0 29 pF |
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