DE: Unit 3 Review

What is the limitation of the 74LS93 counter?

• It can only be used to implement up counts

• It can be used to implement both up and down counts

• It can only be used to implement down counts

• The flip-flops are pre-settable

What is the primary difference between a D flip-flop and a D latch?

• The flip-flop has transparent inputs while the latch does not

• The flip-flop has asynchronous inputs while the latch does not

• The clock input is edge sensitive for the flip-flop and level sensitive for the latch

• The clock input is level sensitive for the flip-flop and edge sensitive for the latch

What is the purpose of asynchronous inputs (Preset & Clear) in a flip-flop?

• To override the clock/data inputs and force the outputs to a predefined state

• To synchronize the clock and data inputs for accurate timing

• To provide additional clock cycles for data processing

• To enable transparent latching of data inputs

What is the function of the Enable (EN) input in a transparent D-latch?

• To provide additional clock cycles for data processing

• To override the clock/data inputs and force the outputs to a predefined state

• To control when the latch is transparent or latched

• To synchronize the clock and data inputs for accurate timing

Which type of flip-flop has a positive edge-triggered clock input?

• Quad latch

• D flip-flop

• J/K flip-flop

• D latch

What is the timing interval before the active transition of the clock signal during which the data input must be maintained called?

• Hold Time (tH)

• Preset Time (tP)

• Clear Time (tC)

• Setup Time (tS)

Which component is used to force the output of a flip-flop to a predefined state?

• Data input

• Clock input

• Enable input

• Asynchronous inputs (Preset & Clear)

What is the function of the J and K inputs in a J/K flip-flop?

• To override the clock/data inputs and force the outputs to a predefined state

• To provide additional clock cycles for data processing

• To control when the flip-flop is transparent or latched

• To determine the next state of the flip-flop based on the current state and the clock input

Which flip-flop has excitation table with J and K inputs?

• D latch

• J/K flip-flop

• Quad latch

• D flip-flop

What is the main function of the 74LS163 Synchronous 4-Bit Binary Up Counter?

• Data clearing

• Counting up

• Counting down

• Data loading