전자부품 데이터시트 검색엔진 |
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74VHCT240ASJ 데이터시트(PDF) 4 Page - Fairchild Semiconductor |
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74VHCT240ASJ 데이터시트(HTML) 4 Page - Fairchild Semiconductor |
4 / 7 page www.fairchildsemi.com 4 AC Electrical Characteristics Note 8: Parameter guaranteed by design. tOSLH = |tPLH max − tPLH min|; tOSHL = |tPHL max − tPHL min| Note 9: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: ICC (opr.) = CPD * VCC * fIN + ICC/8 (per F/F). The total CPD when n pcs. of the Octal D Flip-Flop operates can be calculated by the equation: CPD (total) = 20 + 12n. Symbol Parameter VCC (V) TA = 25°C TA = −40°C to +85°C Units Conditions Min Typ Max Min Max tPLH Propagation Delay 5.0 ± 0.5 5.6 7.8 1.0 9.0 ns CL = 15 pF tPHL Time 6.1 8.8 1.0 10.0 CL = 50 pF tPZL 3-STATE Output 5.0 ± 0.5 6.5 10.4 1.0 12.5 ns RL = 1 kΩ CL = 15 pF tPZH Enable Time 7.3 11.4 1.0 13.5 CL = 50 pF tPLZ 3-STATE Output 5.0 ± 0.5 7.0 11.4 1.0 13.0 ns RL = 1 kΩ CL = 50 pF tPHZ Disable Time tOSLH Output to 5.0 ± 0.5 1.0 1.0 ns (Note 8) tOSHL Output Skew CIN Input 4 10 10 pF VCC = Open Capacitance COUT Output 9 pF VCC = 5.0V Capacitance CPD Power Dissipation 19 pF (Note 9) Capacitance |
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