What is the use of IC 74ls 138?
What is a 74LS138 IC? This IC is mainly used in de-multiplexing applications with the help of an enable pin like a data input pin. And also the inputs of this IC is clamped with Schottky diodes which are the high performance to contain line ringing as well as system design simplify.
Which IC used in decoder?
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 IC 74138 for?
Use of 74138 to generate chip select logic: 74138 is used to generate chip signals.
What kind of IC is 74138?
The IC 74138 is available in the market with the name of 74LS138. It is a 3 to 8 decoder IC. The internal circuit of this IC is made of high-speed Schottky barrier diode.
What is decoder IC?
What are Decoders? Decoders are digital ICs which are used for decoding. In other words, the decoders decrypt or obtain the actual data from the received code, i.e. convert the binary input at its input to a form, which is reflected at its output. It consists of n input lines and 2^n output lines.
How many inputs will a 3 bit output encoder have?
8 inputs
8 : 3 Encoder (Octal to Binary) – The 8 to 3 Encoder or octal to Binary encoder consists of 8 inputs : Y7 to Y0 and 3 outputs : A2, A1 & A0. Each input line corresponds to each octal digit and three outputs generate corresponding binary code.
What is a decoder IC?
Decoders are digital ICs which are used for decoding. In other words, the decoders decrypt or obtain the actual data from the received code, i.e. convert the binary input at its input to a form, which is reflected at its output. It consists of n input lines and 2^n output lines.
How do I use IC 74138?
74LS138 is used in de-multiplexing applications by using enable pin as data input pin. Also the chip inputs are clamped with high-performance Schottky diodes to suppress line-ringing and simplify system design….74LS138 Pin configuration.
| Pin | Name | Description |
|---|---|---|
| 15 | Y0 | Output pin 0 |
| 16 | VCC | Power supply pin |
Where is a decoder used?
Amongst its many uses, a decoder is widely used to decode the particular memory location in the computer memory system. Decoders accept the address code generated by the CPU which is a combination of address bits for a specific location in the memory.
What is decoder with example?
A decoder is a circuit which has n inputs and 2n outputs, and outputs 1 on the wire corresponding to the binary number represented by the inputs. For example, a 2-4 decoder might be drawn like this: and its truth table (again, really four truth tables, one for each output) is: i1. i0.
How many outputs does a 3 input decoder have?
A 3 to 8 decoder has three inputs (A,B,C) and eight outputs (DO to D7). Based on the 3 inputs one of the eight outputs is selected. The truth table for 3 to 8 decoder is shown in table (1). From the truth table, it is seen that only one of eight outputs (DO to D7) is selected based on three select inputs.
How do you implement a 3 to 8 decoder circuit?
From the above Boolean expressions, the implementation of 3 to 8 decoder circuit can be done with the help of three NOT gates & 8-three input AND gates. In the above circuit, the three inputs can be decoded into 8 outputs, where every output represents one of the midterms of the three input variables.
Why do we use three decoders in a microcontroller?
In high performance memory systems these decoders can be used to minimize the effects of system decoding. The three enable pins of chip (in which Two active-low and one active-high) reduce the need for external gates or inverters when expanding.
Which IC 74hc238 is used as Decoder/ Demultiplexer?
IC 74HC238 is used is used as 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.
How many inverters are required for 74ls138 32-line decoder IC?
In the case of the 32-line decoder IC will require one inverter. 74LS138 uses enable pins as data input to the input decoder, without enabling pins active the data won’t be able to decode. 74LS138 is designed with Schottky diodes which helps to suppress line-rigging and it makes the design simple. Pin no 1,2,3 will be used as input pins.