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CD74HC4538M96G4 Scheda tecnica(PDF) 8 Page - Texas Instruments |
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CD74HC4538M96G4 Scheda tecnica(HTML) 8 Page - Texas Instruments |
8 / 18 page 8 R to Q tPHL CL = 50pF 4.5 - - 40 - 50 - 60 ns CL = 15pF 5 - 17 - - - - - ns R to QtPLH CL = 50pF 4.5 - - 50 - 63 - 75 ns CL = 15pF 5 - 21 - - - - - ns Output Transition Time tTLH, tTHL CL = 50pF 4.5 - - 15 - 19 - 22 ns Output Pulse Width RX = 10k, CX = 0.1µF τ CL = 50pF 5 0.63 - 0.77 0.602 0.798 0.595 0.805 ms Output Pulse Width Match, Same Package -- - - ±1- - - - - % Power Dissipation Capacitance (Notes 8, 9) CPD CL = 15pF 5 - 134 - - - - - pF Input Capacitance CI CL = 50pF - 10 - 10 - 10 - 10 pF NOTES: 8. CPD is used to determine the dynamic power consumption, per one shot. 9. PD =(CPD +CX)VCC 2 f i ∑(CL VCC 2 f O) where fi = input frequency, fO = output frequency, CL = output load capacitance, CX = external capacitance VCC = supply voltage assuming fi « Switching Specifications CL = 50pF, Input tr, tf = 6ns, RX = 10KΩ, CX = 0 (Continued) PARAMETER SYMBOL TEST CONDITIONS VCC (V) 25oC -40oC TO 85oC -55oC TO 125oC UNITS MIN TYP MAX MIN MAX MIN MAX I τ -- Test Circuits and Waveforms FIGURE 6. HC AND HCU TRANSITION TIMES AND PROPAGA- TION DELAY TIMES, COMBINATION LOGIC FIGURE 7. HCT TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC tPHL tPLH tTHL tTLH 90% 50% 10% 50% 10% INVERTING OUTPUT INPUT GND VCC tr = 6ns tf = 6ns 90% tPHL tPLH tTHL tTLH 2.7V 1.3V 0.3V 1.3V 10% INVERTING OUTPUT INPUT GND 3V tr = 6ns tf = 6ns 90% CD54HC4538, CD74HC4538, CD54HCT4538, CD74HCT4538 |
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