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M74HCT174 Datasheet(PDF) 5 Page - STMicroelectronics |
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M74HCT174 Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 11 page AC ELECTRICAL CHARACTERISTICS (CL =50 pF, Input tr =tf =6 ns) Symbol Parameter Test Conditions Value Unit VCC (V) TA =25 oC 54HC and 74HC -40 to 85 oC 74HC -55 to 125 oC 54HC Min. Typ. Max. Min. Max. Min. Max. tTLH tTHL Output Transition Time 4.5 8 151922 ns tPLH tPHL Propagation Delay Time (CK - Q) 4.5 18 28 35 ns tPHL Propagation Delay Time (CLR - Q) 4.5 18 28 35 42 ns fMAX Maximum Clock Frequency 4.5 30 54 24 MHz tW(H) tW(L) Minimum Pulse Width (CLOCK) 4.5 8 151922 ns tW(L) Minimum Pulse Width (CLR) 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 CIN Input Capacitance 5 10 10 10 pF CPD (*) Power Dissipation Capacitance 68 pF (*) 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 operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •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 M54/M74HCT174 5/11 |
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