Datenblatt-Suchmaschine für elektronische Bauteile |
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M74HCT244M1R Datenblatt(PDF) 6 Page - STMicroelectronics |
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M74HCT244M1R Datenblatt(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 4.5 50 7 12 15 18 ns tPLH tPHL Propagation Delay Time 4.5 50 15 22 28 33 ns 4.5 150 21 30 38 45 ns tPLH tPHL Propagation Delay Time 4.5 50 15 25 31 38 ns 4.5 150 21 33 41 50 ns tPZL tPZH Output Enable Time 4.5 50 RL =1K Ω 17 30 38 45 ns 4.5 150 RL =1K Ω 23 38 48 57 ns tPLZ tPHZ Output Disable Time 4.5 50 RL =1K Ω 16 30 38 45 ns CIN Input Capacitance 5 10 10 10 pF COUT Output Capacitance 10 pF CPD (*) Power Dissipation Capacitance HCT240 HCT241/244 33 31 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/8 (per circuit) TEST CIRCUIT ICC (Opr.) HCT240 M54/M74HCT240/241/244 6/12 |
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