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74VHC244M Scheda tecnica(PDF) 4 Page - Fairchild Semiconductor |
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74VHC244M Scheda tecnica(HTML) 4 Page - Fairchild Semiconductor |
4 / 8 page www.fairchildsemi.com 4 AC Electrical Characteristics Note 4: Parameter guaranteed by design. tOSLH |tPLHmax tPLHmin|; tOSHL |tPHLmax tPHLmin|. Note 5: 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 bit). Symbol Parameter VCC TA 25qCTA 40qC to 85qC Units Conditions (V) Min Typ Max Min Max tPLH Propagation Delay 3.3 r 0.3 5.8 8.4 1.0 10.0 ns CL 15 pF tPHL Time 8.3 11.9 1.0 13.5 CL 50 pF 5.0 r 0.5 3.9 5.5 1.0 6.5 ns CL 15 pF 5.4 7.5 1.0 8.5 CL 50 pF tPZL 3-STATE Output 3.3 r 0.3 6.6 10.6 1.0 12.5 ns RL 1 k: CL 15 pF tPZH Enable Time 9.1 14.1 1.0 16.0 CL 50 pF 5.0 r 0.5 4.7 7.3 1.0 8.5 ns CL 15 pF 6.2 9.3 1.0 10.5 CL 50 pF tPLZ 3-STATE Output 3.3 r 0.3 10.3 14.0 1.0 16.0 ns RL 1 k: CL 50 pF tPHZ Disable Time 5.0 r 0.5 6.7 9.2 1.0 10.5 CL 50 pF tOSLH Output to Output 3.3 r 0.3 1.5 1.5 ns (Note 4) CL 50 pF tOSHL Skew 5.0 r 0.5 1.0 1.0 CL 50 pF CIN Input Capacitance 4 10 10 pF VCC Open COUT Output Capacitance 6 pF VCC 5.0V CPD Power Dissipation Capacitance 19 pF (Note 5) |
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