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  1. Asynchronous operation
  2. Low input voltage
  3. Gate impedance
  4. Cross coupling
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Option 4 : Cross coupling

  • Latch is a type of bi-stable multivibrator having two stable states.
  • Both the inputs of a latch are directly connected to the other's output.
  • Such a type of structure is called cross-coupling.
  • Hence, the latches constructed with NOR and NAND gates tend to remain in the latched condition due to cross-coupling.
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