# How many low enable lines are there in 3 to 8 decoder?

## How many low enable lines are there in 3 to 8 decoder?

three Enable pins
3 to 8 Decoder/Demultiplexer 3 to 8 line decoder demultiplexer is a combinational circuit that can be used as both a decoder and a demultiplexer. IC 74HC238 decodes three binary address inputs (A0, A1, A2) into eight outputs (Y0 to Y7). The device also has three Enable pins.

What is the difference between 2 to 4 decoder and 3 to 8 decoder?

We know that 2 to 4 Decoder has two inputs, A1 & A0 and four outputs, Y3 to Y0. Whereas, 3 to 8 Decoder has three inputs A2, A1 & A0 and eight outputs, Y7 to Y0. We can find the number of lower order decoders required for implementing higher order decoder using the following formula.

### What is a 3 to 8 line decoder?

3 to 8 line decoder: The 3 to 8 line decoder is also known as Binary to Octal Decoder. In a 3 to 8 line decoder, there is a total of eight outputs, i.e., Y0, Y1, Y2, Y3, Y4, Y5, Y6, and Y7 and three outputs, i.e., A0, A1, and A2. This circuit has an enable input ‘E’.

How many 3 to 8 line decoders with an enable input are needed to construct a 6?

GATE | GATE-CS-2007 | Question 85 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.

#### How many inputs are needed for a 16 decoder?

16 = 24 = 2n. Thus, number of inputs is 4.

How many and gates are required to implement a 3 to 8 decoder with an enable?

Using the above expressions, the circuit of a 3 to 8 decoder can be implemented using three NOT gates and eight 3-input AND gates as shown in figure (1). The three inputs A, B, and C are decoded into eight outputs, each output representing one of the midterms of the 3-input variables.

## How many 4 line to 16 line decoders are needed to make an 8 line to 256 line decoders?

What is enable in decoder?

Decoders with Enable A standard decoder typically has an additional input called Enable. Output is only generated when the Enable input has value 1; otherwise, all outputs are 0. Only a small change in the implementation is required: the Enable input is fed into the AND gates which produce the outputs.

### What will be the output of a 4 to 16 encoder when its fourth input is high?

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….Implement 8:1 mux using 4:1 mux.

ABCD Input Lines Decoder Enabled Output Lines
1110 D4 Decoder Y14
1111 D4 Decoder Y15

How many outputs would two 8 line to 3 line encoders expanded to a 16 line to 4 line encoder have?

The answer to the question, “How many outputs would two 8-line to 3-line encoders, expanded to a 16-line to 4-line encoder have?”, will be 4.

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

What is an enable line?

An Enable will allow an input signal, shown in green, to pass the output, shown in red, when the control signal is high. It will prevent a signal from passing when the control signal is switched to low.