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M54HC258B1R Datasheet(PDF) 6 Page - STMicroelectronics |
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M54HC258B1R Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 12 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. tTLH tTHL Output Transition Time 2.0 50 25 60 75 90 ns 4.5 7 121519 6.0 6 101315 tPLH tPHL Propagation Delay Time (A, B - Y) 2.0 50 45 100 125 150 ns 4.5 13 20 25 30 6.0 11 17 21 26 2.0 150 62 140 175 210 ns 4.5 18 28 35 42 6.0 15 24 30 36 tPLH tPHL Propagation Delay Time (SELECT - Y) 2.0 50 45 100 125 150 ns 4.5 13 20 25 30 6.0 11 17 21 26 2.0 150 62 140 175 210 ns 4.5 18 28 35 42 6.0 15 24 30 36 tPZL tPZH Output Enable Time 2.0 50 RL =1 K Ω 40 110 140 165 ns 4.5 12 22 28 33 6.0 10 19 24 28 2.0 150 RL =1 K Ω 57 150 190 225 ns 4.5 17 30 38 45 6.0 14 26 32 38 tPLZ tPHZ Output Disable Time 2.0 50 RL =1 K Ω 28 140 175 210 ns 4.5 14 28 35 42 6.0 13 24 30 36 CIN Input Capacitance 5 10 10 10 pF COUT Output Capacitance 10 pF CPD (*) Power Dissipation Capacitance 47 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/4 (per Channel) M54/M74HC257/258 6/12 |
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