The timing characteristics of a 74 series D flip-flop and logic gate (e.d. NAND) are shown below, respectively: x SN5474

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The Timing Characteristics Of A 74 Series D Flip Flop And Logic Gate E D Nand Are Shown Below Respectively X Sn5474 1 (182.7 KiB) Viewed 32 times

The timing characteristics of a 74 series D flip-flop and logic gate (e.d. NAND) are shown below, respectively: x SN5474, SN54LS74A, SN54S74 SN7474. SN74LS74A, SN74S74 DUAL D-TYPE POSITIVE-EDGE-TRIGGERED FLIP-FLOPS WITH PRESET AND CLEAR SOLS119-DECEMBER 1983-REVISED MARCH 1988 recommended operating conditions Voc Supply voltage VIH High-level input voltage VIL Low-level input voltage OH High-level output current LOL Low-level output current "W Pulse duration CLK high CLK low CLH or PRE low 5 Propagation delay High-level date Low-level dete A or B SN54574 MIN NOM MAX 5 5.5 4.5 2 Isu Setup time, before CLK Th Input hold time data after CLK TA Operating free air temperature Maximum propagation delay (from CLK to output Q) is 1.5 ns. 6 7.3 7 3 3 3 2 -55 0.8 -1 20 125 SN74574 MIN NOM MAX 4.75 5 5.25 2 6 7.3 7 3 3 2 0 Logic gates: 6.6 Switching Characteristics over operating free-air temperature range; typical ratings measured at T₁ = 25°C (unless otherwise noted). See the Parameter Measurement Information. PARAMETER FROM (INPUT) TO (OUTPUT) 0.8 -1 20 8 7 UNIT V V V MA MA mA su па ns 70 *C Vec MIN TYP MAX UNIT 2V 19 56 22 45V 6V 19 Ben was assigned to build a sequential logic circuit that has a combinational logic circuit between two registers using 74 series D flip-flop. The longest path of the combinational logic circuit traverses 3 logic gates, and the Vcc for the logic gates is 4.5 V. In this circuit, the longest propagation delay of the combinational logic circuit is [a] ns (nanosecond), the aperture time of the registers is ns. To meet the setup time constraint, the shortest clock cycle time for this circuit must be [c] ns, thus the frequency of the clock signal must be lower than [d] MHz. Note: the clock frequency should rounded to 2 digits after the floating point (e.g 123.12).