The document discusses a NAND latch, which is a type of sequential logic circuit that can store one bit of information. It consists of two cross-coupled NAND gates that provide feedback to each other. The state of the latch's output Q is determined by the previous inputs and state, not just the current inputs. The NAND latch can be set to 1 by applying a 1 to the S input and reset to 0 by a 1 on the R input. It will maintain its output state as long as neither input is active.
4. Combinational Logic:
1.Output depends only on current inputs
Sequential Logic:
2.Need some type of memory to remember the past input
values .
1.Output depends not only on current inputs but also on
past input values .
NAND Latch is Sequential Logic:
7. Basic Latch – is a feedback connection of two NOR gates or two
NAND gates, which can store one bit of information. It can be set using
the One input and reset to 0 using the Another input.
Basic Latch
NAND Latch NOR Latch
8. NAND Latch :
For storing one bit of information if we use two NAND gates
to make a feedback connection , then it called NAND Latch .
NAND Latch
9. NAND Gate Latch
The two NAND gates are cross-
coupled so that the output of to
one of the input of NAND-2, and
vice versa. The gate output, labeled
Q and Q’, respectively, are latch
out-put. Under normal conditions,
these output will always be the
inverse of each other.
NAND-1
NAND-2
NAND Latch
