What does a 4 to 16 Decoder do?

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 an encoder circuit?

An Encoder is a combinational circuit that performs the reverse operation of Decoder.It has maximum of 2^n input lines and ‘n’ output lines, hence it encodes the information from 2^n inputs into an n-bit code. It will produce a binary code equivalent to the input, which is active High.

What is 4 bit priority encoder?

A 4-bit priority encoder has 4 active-low inputs and 2 coded outputs. The four inputs D3, D2, D1, D0 has a different priority. D3 has the highest priority, whereas D0 has the lowest priority. The following table shows the truth table for the logic circuit.

How many and gates are required for a 4 to 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.

What is encoder example?

An encoder is an electronic device used to convert an analogue signal to a digital signal such as a BCD code. The encoder allows 2 power N inputs and generates N-number of outputs. For example, in 4-2 encoder, if we give 4 inputs it produces only 2 outputs.

Where is encoder used?

Encoders are used in devices that need to operate in high speed and with high accuracy. The method of controlling the motor rotation by detecting the motor rotation speed and rotation angle using an encoder is called feedback control (closed loop method).

How many inputs are needed for a 1/16 decoder?

How many inputs are required for a 1-of-16 decoder? Explanation: A binary decoder is a combinational logic circuit which decodes binary information from n-inputs to a maximum of 2n outputs. Here, number of outputs = 16. 16 = 24 = 2n.

How many 4 1 MUXS are required to build a 16 1 mux?

In a 4:1 mux, you have 4 input pins, two select lines and one output. So, at the least you have to use 4 4:1 MUX, to obtain 16 input lines.

How many outputs does an encoder circuit give?

An encoder is a combinational circuit that changes a set of signals into a code. For ‘2^n’ inputs an encoder circuit gives ‘n’ outputs. The following figure shows the block diagram of a decoder. This decoder circuit gives 8 logic outputs for 3 inputs. The circuit is designed with AND and NAND combinations.

When does a 4 to 16 decoder circuit work?

The decoder circuit works only when the Enable pin is high. When the Enable (E) pin is low, all the output pins are low. A decoder circuit of the higher combination is obtained by adding two or more lower combinational circuits. 4 to 16 decoder circuit is obtained from two 3 to 8 decoder circuits or three 2 to 4 decoder circuits.

Are there any problems with the 16 line encoder?

After months of hard work, you unveil your latest masterpiece, the 16-line to 4-line encoder: However, your first customer has a complaint with your encoder circuit. He claims it often outputs false codes.

What’s the difference between a 4 : 2 and an 8-3 encoder?

The working and usage of 8:3 Encoder is also similar to the 4:2 Encoder except for the number of input and output pins. The 8:3 Encoder is also called as Octal to Binary Encoder the block diagram of an 8:3 Encoder is shown below Here the Encoder has 8 inputs and 3 outputs, again only one input should be high (1) at any given time.