It takes four flip-flops to act as a divide-by-4 frequency divider.

More Questions from Flip-Flops

• An astable multivibrator is sometimes referred to as a clock.
• The 7476 and 74LS76 are both dual flip-flops.
• An input which can only be accepted when an enable or trigger is present is called asynchronous.
• The key to edge-triggered sequential circuits in VHDL is the ________.
• Setup time specifies ________.
• The inputs on a 7474 D flip-flop are S, R, D, and CLK ________ is/are synchronous.
• An edge-triggered flip-flop can change states only when ________.
• The 74121 nonretriggerable multivibrator can have the output pulse set by a single external component. This component is a(n) ________.
• In VHDL, each instance of a component is given a name followed by a ________ and the name of the library primitive.
• In synchronous systems, the exact times at which any output can change state are determined by a signal commonly called the ________.

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