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SN74HCT74DG4 Datasheet(PDF) 4 Page - Texas Instruments |
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SN74HCT74DG4 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 15 page SN54HCT74, SN74HCT74 DUAL DTYPE POSITIVEEDGETRIGGERED FLIPFLOPS WITH CLEAR AND PRESET SCLS169E − DECEMBER 1982 − REVISED APRIL 2004 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) PARAMETER FROM TO VCC TA = 25°C SN54HCT74 SN74HCT74 UNIT PARAMETER FROM (INPUT) TO (OUTPUT) VCC MIN TYP MAX MIN MAX MIN MAX UNIT fmax 4.5 V 27 40 18 22 MHz fmax 5.5 V 30 46 20 24 MHz PRE or CLR Q or Q 4.5 V 21 35 53 44 tpd PRE or CLR Q or Q 5.5 V 17 31 48 40 ns tpd CLK Q or Q 4.5 V 20 28 42 35 ns CLK Q or Q 5.5 V 18 25 38 31 tt Q or Q 4.5 V 8 15 22 19 ns tt Q or Q 5.5 V 7 14 20 17 ns operating characteristics, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance per flip-flop No load 35 pF PARAMETER MEASUREMENT INFORMATION VOLTAGE WAVEFORMS SETUP AND HOLD AND INPUT RISE AND FALL TIMES VOLTAGE WAVEFORMS PULSE DURATIONS th tsu 1.3 V 1.3 V 1.3 V 0.3 V 0.3 V 2.7 V 2.7 V 3 V 3 V 0 V 0 V tr tf Reference Input Data Input 1.3 V High-Level Pulse 1.3 V 3 V 0 V 1.3 V 1.3 V 3 V 0 V tw Low-Level Pulse VOLTAGE WAVEFORMS PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES 1.3 V 1.3 V 1.3 V 10% 10% 90% 90% 3 V VOH VOL 0 V tr tf Input In-Phase Output 1.3 V tPLH tPHL 1.3 V 1.3 V 10% 10% 90% 90% VOH VOL tr tf tPHL tPLH Out-of- Phase Output Test Point From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT NOTES: A. CL includes probe and test-fixture capacitance. B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns. C. For clock inputs, fmax is measured when the input duty cycle is 50%. D. The outputs are measured one at a time, with one input transition per measurement. E. tPLH and tPHL are the same as tpd. Figure 1. Load Circuit and Voltage Waveforms PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. |
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