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CD74HC4538QPWRG4Q1 Folha de dados(PDF) 6 Page - Texas Instruments |
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CD74HC4538QPWRG4Q1 Folha de dados(HTML) 6 Page - Texas Instruments |
6 / 16 page CD74HC4538-Q1 HIGH-SPEED CMOS LOGIC DUAL RETRIGGERABLE PRECISION MONOSTABLE MULTIVIBRATOR SCLS595A − NOVEMBER 2004 − REVISED APRIL 2008 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics over recommended operating free-air temperature range (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) LOAD CAPACITANCE VCC TA = 25°C TA = −40°C TO 85 °C TA = −40°C TO 125 °C UNIT PARAMETER (INPUT) (OUTPUT) CAPACITANCE VCC MIN TYP MAX MIN MAX MIN MAX UNIT 2 V 250 315 375 AB QorQ CL = 50 pF 4.5 V 50 63 75 A, B Q or Q CL 50 pF 6 V 43 54 64 t CL = 15 pF 5 V 21 ns tpd 2 V 250 315 375 ns R QorQ CL = 50 pF 4.5 V 50 63 75 R Q or Q CL 50 pF 6 V 43 54 64 CL = 15 pF 5 V 21 2 V 75 95 110 tt CL = 50 pF 4.5 V 15 19 22 ns tt CL 50 pF 6 V 13 16 19 ns τ† C =50pF 3 V 0.64 0.78 0.612 0.812 0.605 0.819 ms τ† CL = 50 pF 5 V 0.63 0.77 0.602 0.798 0.595 0.805 ms † Output pulse width with RX = 10 kΩ and CX = 0.1 µF operating characteristics, VCC = 5 V, TA = 25°C, input tr, tf = 6 ns, CL = 15 pF PARAMETER TYP UNIT Cpd Power dissipation capacitance (see Note 6) 136 pF NOTE 6: Cpd is used to determine the dynamic power consumption, per one shot. PD = (Cpd + CX) VCC2 fI Σ(CL VCC2 fO) fI = input frequency fO = output frequency CL = output load capacitance CX = external capacitance VCC = supply voltage, assuming fI % l/τ |
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