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M74HC299 데이터시트(PDF) 8 Page - STMicroelectronics |
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M74HC299 데이터시트(HTML) 8 Page - STMicroelectronics |
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8 / 15 page ![]() AC ELECTRICAL CHARACTERISTICS (CL =50 pF, Input tr =tf =6 ns) Symbol Parameter Test Conditions Value Unit VCC (V) CL (pF) TA =25 oC 54HC and 74HC -40 to 85 oC 74HC -55 to 125 oC 54HC Min. Typ. Max. Min. Max. Min. Max. tPLH tPHL Propagation Delay Time (CK - QA, QH) 2.0 50 80 160 200 240 ns 4.5 21 32 40 48 6.0 17 27 34 41 2.0 150 100 200 250 300 ns 4.5 26 40 50 60 6.0 21 34 43 51 tPHL Propagation Delay Time (CLR - QA, QH) 2.0 50 for HC323 85 190 240 285 ns 4.5 24 38 48 57 6.0 18 32 41 48 2.0 150 for HC323 105 230 290 345 ns 4.5 29 46 58 69 6.0 22 39 49 59 tPZL tPZH 3 State Output Enable Time 2.0 50 RL =1 K Ω 60 130 165 195 ns 4.5 17 26 33 39 6.0 13 22 28 33 2.0 150 RL =1 K Ω 78 170 15 255 ns 4.5 23 34 43 51 6.0 17 29 37 43 tPLZ tPHZ 3 State Output Disable Time 2.0 50 RL =1 K Ω 54 150 190 225 ns 4.5 19 30 38 45 6.0 16 26 32 38 fMAX Maximum Clock Frequency 2.0 50 6 12 4.8 4 ns 4.5 30 58 24 20 6.0 35 80 28 24 tW(L) tW(H) Minimum Pulse Width (CLOCK) 2.0 50 75 95 110 ns 4.5 15 19 22 6.0 13 16 19 tW(L) Minimum Pulse Width (CLEAR) 2.0 50 for HC299 75 95 110 ns 4.5 15 19 22 6.0 13 16 19 ts Minimum Set-up Time (S0, S1) (SL, SR, A H) (CLEAR for 323) 2.0 50 100 125 150 ns 4.5 20 25 30 6.0 17 21 26 th Minimum Hold Time (S0, S1) (SL, SR, A H) (CLEAR for 323) 2.0 50 000 ns 4.5 0 0 0 6.0 0 0 0 tREM Minimum Removal Time (CLEAR) 2.0 50 for HC299 50 65 75 ns 4.5 10 13 15 6.0 9 11 13 CIN Input Capacitance 5 10 10 10 pF CPD (*) Power Dissipation Capacitance 170 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 M54/M74HC299/323 8/15 |
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