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What is a 4 line to 16 line decoder?
The 74HC154; 74HCT154 is a 4-to-16 line decoder/demultiplexer. It decodes four binary weighted address inputs (A0 to A3) to sixteen mutually exclusive outputs (Y0 to Y15). The device features two input enable (E0 and E1) inputs. A HIGH on either of the input enables forces the outputs HIGH.
What is IC 74154?
In 74LS154 IC, Each of these 4-line-to-16-line decoders utilizes TTL circuitry to decode four binary-coded inputs into one of sixteen mutually exclusive outputs when both the strobe inputs, G1 and G2, are LOW. These demultiplexers are ideally suited for implementing high-performance memory decoders.
Which IC is used for the implementation of 1 to 16 demux?
Explanation: IC 74154 is used for the implementation of 1-to-16 DEMUX, whose output is inverted input.
Why are there 16 demultiplexers in a 74154 decoder?
The active-low enable inputs allow cascading of demultiplexers over many bits. If you wanted to generate a 1 of 256 demultiplexer, you could use 16 74154s looking at the 4 least significant bits, while a single 74154 would look at the 4 most significant bits, with one ouput going to each of the other 16 74154s.
What kind of decoder is the 74hct154?
General description The 74HC154; 74HCT154 is a 4-to-16 line decoder/demultiplexer. It decodes four binary weighted address inputs (A0 to A3) to sixteen mutually exclusive outputs (Y0 to Y15). The device features two input enable (E0 and E1) inputs. A HIGH on either of the input enables forces the outputs HIGH.
Why are NAND gates used on the 74154 decoder?
First, the inversion of the outputs simply means that the output is active low. That is, for an input of 0000, the 0 output is selected, and it is driven low. All the other ouputs stay high. The NAND gates are used because, given that the active lines on the 74154 are low, DeMorgan’s Theorem allows NAND gates to function as OR gates.
How many inputs are in a 4 line decoder?
Each or these 4-line-to-16-line decoders utilizes TTL circuitry to decode four binary-coded inputs into one of sixteen mutually exclusive outputs when both the strobe inputs, G1 and G2, are low.
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