6. Which of the following statements concerning the basic latch circuit is FALSE?

  1. A latch circuit may be constructed with NOR Gates.
  2. A latch is a synchronous sequential logic circuit.
  3. The Q and Q' outputs of a latch can, under certain input conditions, be equal.
  4. The latch is utilized in all flip-flop circuits.
  5. Allowable modes of operations of the latch include the SET, RESET and NO CHANGE modes.

5 is WRONG (that is, it is a TRUE statement). The allowable modes of operations of the latch are the SET, RESET, and NO CHANGE modes. The INDETERMINANT mode of operation results in Q = Q' = 1, so it is usually avoided (unallowed).

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