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SN74ACT74 Datasheet(PDF) 5 Page - Texas Instruments |
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SN74ACT74 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 21 page SN54ACT74, SN74ACT74 DUAL POSITIVEEDGETRIGGERED DTYPE FLIPFLOPS WITH CLEAR AND PRESET SCAS520H − AUGUST 1995 − REVISED OCTOBER 2003 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics over recommended operating free-air temperature (unless otherwise noted) (see Figure 1) FROM TO SN74ACT74 PARAMETER FROM (INPUT) TO (OUTPUT) TA = 25°C MIN MAX UNIT PARAMETER (INPUT) (OUTPUT) MIN TYP MAX MIN MAX UNIT fmax 145 210 125 MHz tPLH PRE or CLR Q or Q 3 5.5 9.5 2.5 10.5 ns tPHL PRE or CLR Q or Q 3 6 10 3 11.5 ns tPLH CLK Q or Q 4 7.5 11 4 13 ns tPHL CLK Q or Q 3.5 6 10 3 11.5 ns operating characteristics, VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance CL = 50 pF, f = 1 MHz 45 pF PARAMETER MEASUREMENT INFORMATION 50% VCC 3 V 3 V 0 V 0 V th tsu VOLTAGE WAVEFORMS Data Input tPLH tPHL tPHL tPLH VOH VOH VOL VOL 3 V 0 V 50% VCC 50% VCC Input Out-of-Phase Output In-Phase Output Timing Input 50% VCC VOLTAGE WAVEFORMS tPLH/tPHL Open TEST S1 3 V 0 V tw VOLTAGE WAVEFORMS Input NOTES: A. CL includes probe and jig capacitance. B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. C. The outputs are measured one at a time with one input transition per measurement. LOAD CIRCUIT From Output Under Test CL = 50 pF (see Note A) S1 2 × VCC 500 Ω 500 Ω Open 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V Figure 1. Load Circuit and Voltage Waveforms |
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