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M54HC688 数据表(PDF) 5 Page - STMicroelectronics |
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M54HC688 数据表(HTML) 5 Page - STMicroelectronics |
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5 / 10 page ![]() M74HC688 5/10 Table 6: AC Electrical Characteristics (CL = 50 pF, Input tr =tf = 6ns) Table 7: Capacitive Characteristics 1) 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 operating current can be obtained by the following equation. ICC(opr) =CPD xVCC xfIN +ICC Figure 4: Test Circuit CL = 50pF/150pF or equivalent (includes jig and probe capacitance) RT =ZOUT of pulse generator (typically 50Ω) Symbol Parameter Test Condition Value Unit VCC (V) TA = 25°C -40 to 85°C -55 to 125°C Min. Typ. Max. Min. Max. Min. Max. tTLH tTHL Output Transition Time 2.0 30 75 95 110 ns 4.5 8 15 19 22 6.0 7 13 16 19 tPLH tPHL Propagation Delay Time (Pn, Qn - P=Q) 2.0 60 170 215 255 ns 4.5 21 34 43 51 6.0 17 29 37 43 tPLH tPHL Propagation Delay Time (G - P=Q) 2.0 40 110 140 165 ns 4.5 13 22 28 33 6.0 10 19 24 28 Symbol Parameter Test Condition Value Unit VCC (V) TA = 25°C -40 to 85°C -55 to 125°C Min. Typ. Max. Min. Max. Min. Max. CIN Input Capacitance 510 10 10 pF CPD Power Dissipation Capacitance (note 1) 32 pF |
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