What is 74LS138 decoder?
74LS138 is a complex TTL based logical device used to convert 3-bit binary data to 8-bits. The actual purpose of this chip is designed for demultiplexing or in machine language we can say as a decoding device. The device takes 3 input data and converts it to 8-bit data.
How many decoders are there in IC 74LS138?
Let’s take an Integrated Circuit decoder. We take the popular 3 to 8 decoder Integrated Circuit 74138.
How do I use 74LS138?
A 24-line decoder can be implemented with no external inverters, and a 32-line decoder requires only one inverter. 74LS138 is used in de-multiplexing applications by using enable pin as data input pin….74LS138 Pin configuration.
| Pin | Name | Description |
|---|---|---|
| 15 | Y0 | Output pin 0 |
| 16 | VCC | Power supply pin |
What is 3/8 decoder block diagram?
3 Line to 8 Line Decoder Block Diagram This decoder circuit gives 8 logic outputs for 3 inputs and has a enable pin. The circuit is designed with AND and NAND logic gates. It takes 3 binary inputs and activates one of the eight outputs. 3 to 8 line decoder circuit is also called a binary to an octal decoder.
What is decoder used for?
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.
How many 74LS138 decoders are required to generate CS signals?
The 74LS138 requires 12ns to decode.
Which of the following is a 3/8 decoder IC?
3 to 8 line decoder IC 74HC238 is used as a 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 working principle of decoder?
A decoder is a combinational logic circuit that is used to change the code into a set of signals. It is the reverse process of an encoder. A decoder circuit takes multiple inputs and gives multiple outputs. A decoder circuit takes binary data of ‘n’ inputs into ‘2^n’ unique output.
How do you make a 3/8 decoder?
The implementation of this 3 line to 8 line decoder can be done using two 2 lines to 4 line decoders. We have discussed above that 2 to 4 line decoder includes two inputs and four outputs. So, in 3 lines to 8 line decoder, it includes three inputs like A2, A1 & A0 and 8 outputs from Y7 – Y0.