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M74HCT74 Scheda tecnica(PDF) 5 Page - STMicroelectronics |
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M74HCT74 Scheda tecnica(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 (CLOCK - Q) 4.5 21 33 41 50 ns tPLH tPHL Propagation Delay Time (CL, PR - Q, Q) 4.5 18 30 38 45 ns fMAX Maximum Clock Frequency 4.5 27 48 22 18 MHz tW(H) tW(L) Minimum Pulse Width (CLOCK) 4.5 6 151923 ns tW(L) Minimum Pulse Width (CL, PR) 4.5 8 151923 ns ts Minimum Set-up Time 4.5 7 151923 ns th Minimum Hold Time 4.5 0 0 0 ns tREM Minimum Removal Time (CL, PR) 4.5 15 56 58 ns CIN Input Capacitance 5 10 10 10 pF CPD (*) Power Dissipation Capacitance 32 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/2 (per FLIP/FLOP) M54/M74HCT74 5/11 |
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