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SN74AC74NSR Scheda tecnica(PDF) 5 Page - Texas Instruments |
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SN74AC74NSR Scheda tecnica(HTML) 5 Page - Texas Instruments |
5 / 17 page SN54AC74, SN74AC74 DUAL POSITIVEEDGETRIGGERED DTYPE FLIPFLOPS WITH CLEAR AND PRESET SCAS521F − AUGUST 1995 − REVISED OCTOBER 2003 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements over recommended operating free-air temperature range, VCC = 5 V"0.5 V (unless otherwise noted) (see Figure 1) TA = 25°C SN54AC74 SN74AC74 UNIT MIN MAX MIN MAX MIN MAX UNIT fclock Clock frequency 140 95 125 MHz tw Pulse duration PRE or CLR low 4.5 5.5 5 ns tw Pulse duration CLK 4.5 5.5 5 ns tsu Setup time, data before CLK ↑ Data 3 4 3 ns tsu Setup time, data before CLK ↑ PRE or CLR inactive 0 0.5 0 ns th Hold time, data after CLK ↑ 0.5 0.5 0.5 ns switching characteristics over recommended operating free-air temperature range, VCC = 3.3 V " 0.3 V (unless otherwise noted) (see Figure 1) PARAMETER FROM TO TA = 25°C SN54AC74 SN74AC74 UNIT PARAMETER FROM (INPUT) TO (OUTPUT) MIN TYP MAX MIN MAX MIN MAX UNIT fmax 100 125 70 95 MHz tPLH PRE or CLR Q or Q 3.5 8 12 1 13 2.5 13 ns tPHL PRE or CLR Q or Q 4 10.5 12 1 14 3.5 13.5 ns tPLH CLK Q or Q 4.5 8 13.5 1 17.5 4 16 ns tPHL CLK Q or Q 3.5 8 14 1 13.5 3.5 14.5 ns switching characteristics over recommended operating free-air temperature range, VCC = 5 V " 0.5 V (unless otherwise noted) (see Figure 1) PARAMETER FROM TO TA = 25°C SN54AC74 SN74AC74 UNIT PARAMETER FROM (INPUT) TO (OUTPUT) MIN TYP MAX MIN MAX MIN MAX UNIT fmax 140 160 95 125 MHz tPLH PRE or CLR Q or Q 2.5 6 9 1 9.5 2 10 ns tPHL PRE or CLR Q or Q 3 8 9.5 1 10.5 2.5 10.5 ns tPLH CLK Q or Q 3.5 6 10 1 12 3 10.5 ns tPHL CLK Q or Q 2.5 6 10 1 10 2.5 10.5 ns operating characteristics, VCC = 3.3 V, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance CL = 50 pF, f = 1 MHz 45 pF |
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