How can I make 4X16 decoder using 2X4?

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. This way, the 2X4 select which 4X16 to turn on; and the remaining addresses picks 1 of the 16 outputs.

What does a 2X4 decoder do?

A decoder is a combinational circuit that converts binary information from n input lines to a maximum of m=2^n unique output lines.

How do you implement a 2 4 decoder?

We can implement these four product terms by using four AND gates having three inputs each & two inverters. The circuit diagram of 2 to 4 decoder is shown in the following figure. Therefore, the outputs of 2 to 4 decoder are nothing but the min terms of two input variables A1 & A0, when enable, E is equal to one.

How many and gates are needed for constructing 2 4 decoder?

four 2-
The basic building block of this decoder is shown in Fig. 3. The first-stage of 2-to-4 decoder requires four 2-input AND gates, because total number of logic combinations, that can be formed with two variables is four. Each logical combination of two variables A & B are given to input ports of respective AND gates.

How many 2×4 decoders are needed to draw a 4×16 decoder?

Four 2*4 encoders are required to produce 16 outputs and 1 extra 2*4 decoder is required to enable the decoder when creating 4*16 decoders. As a result, a total of 5 decoders are required.

How do you make a 4/16 decoder?

4 to 16 decoder circuit is obtained from two 3 to 8 decoder circuits or three 2 to 4 decoder circuits. When two 3 to 8 Decoder circuits are combined the enable pin acts as the input for both the decoders. When enable pin is high at one 3 to 8 decoder circuits then it is low at another 3 to 8 decoder circuit.

Why do we use decoder?

The decoder is an electronic device that is used to convert a digital signal to an analog signal. It allows a single input line and produces multiple output lines. The decoders are used in many communication projects that are used to communicate between two devices.

What is a 4 to 16 line decoder?

4-to-16 line decoder/demultiplexer. 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.

What are the 2 input ICs required to design 2/4 line decoder?

2 to 4 Line Decoder Truth Table. In this type of decoders, decoders have two inputs namely A0, A1, and four outputs denoted by D0, D1, D2, and D3.

What is the logic equation for decoder?

In this circuit, the logic equation for D0 is A1/A0, and so on. Thus, each output of the decoder will be generated to the input combination. The applications of decoder involve in the making of various electronic projects. This is all about decoder, and its applications in communication-based projects.

How do I implement a 4 * 16 decoder?

If you can’t find a 4 * 16 decoder in your area and only have a 2 * 4 decoder, you can easily implement a 4 * 16 decoder using a 2 * 4 decoder by following these steps: 2*4 Decoder has two input lines and four output lines, and it chooses one of the lines based on various input combinations.

What is a 2 to 4 line decoder circuit?

2-to-4-Decoder Circuit As a decoder, this circuit takes an n-bit binary number and generates an output on one of the 2n output lines. It is therefore usually described by the number of addressing i/p lines & the number of data o/p lines. Typical decoder ICs might include two 2-4 line circuits, a 3-8 line circuit, or a 4-16 line decoder circuit.

How to construct a decoder with two inputs?

To construct a decoder, we require to know the number of all possible output lines that totally depends on the given input. So, if n represents given input lines then possible output lines would be 2 n . Decoder with two inputs would give 4 outputs (n=2,2 2 that is 4). Step 1.