How many 2X4 decoders are needed for 6X64?
A 6×64 line decoder can be built using: six 2×4 line decoders only seven 3×8 line decoders only b).. 1 answer below »
How many 3×8 decoders are required for 6X64 decoder?
Feed the same three lower address bits to eight 3×8 decoders, whose outputs (8×8 = 64 bits) are your row select lines. Use the upper three address bits as the inputs for a single 3×8 decoder, whose outputs select one of the 8 decoders at a time by controlling the enable input.
How many 2 * 4 decoders are needed to design a 6 * 64 decoder?
You can use one 2X4 decoder and four 4X16 decoders to make a 6X64 . Basically start with 2 of the 6 inputs for the 2X4 decoder. The 4 outputs will drive the enable pin of the four 4X16. And the remaining 4 of the 6 inputs will be the 4 inputs for all four 4X16.
How many 2 * 4 decoders are needed to design a 4 * 16 line decoder?
Therefore, we require two 3 to 8 decoders for implementing one 4 to 16 decoder. The block diagram of 4 to 16 decoder using 3 to 8 decoders is shown in the following figure.
How many 3 to 8 decoder do you need if you are going to design a 6 to 64 decoder?
How many 3-to-8 line decoders with an enable input are needed to construct a 6-to-64 line decoder without using any other logic gates? hence required decoders (from fig.) = 9 so ans is ( C) part.
What does a 2-to-4 decoder do?
A 2-to-4 Binary Decoders The 2 binary inputs labelled A and B are decoded into one of 4 outputs, hence the description of 2-to-4 binary decoder. Each output represents one of the miniterms of the 2 input variables, (each output = a miniterm).
How many outputs does a 4×16 decoder have?
A 4×16 decoder has 4 inputs and 16 outputs, with the outputs going high for the corresponding 4-bit input. Similar is the case of a 2×4 decoder except for its 2 inputs and 4 outputs. Assuming all the 2×4 decoders have an enable input, which activates the decoder when the input to it is logic high, 5 such decoders would be required as shown below.
How to implement a 6 to 64 line decoder using 3 to 8 decoders only?
By finding number of decoder units to be used for 6 x 64, we can design the circuit using 3 x 8 decoder. The design suggested above by @sagar is easy to understand. The first decoder unit will have 3 inputs and other 3 inputs will be given to the 8 decoder units.
How many inputs does a first Decoder Unit have?
The first decoder unit will have 3 inputs and other 3 inputs will be given to the 8 decoder units. And each decoder is activated by the enable line which is nothing but the output of first decoder unit.