How many pins are there in 74138 IC?
16 pins
The Integrated Circuit is of 16 pins. We have three input pins which are actively in high state and are classified as I2, I1 and I0. The outputs are actively in low state and are eight in number and are classified as O7*, O6*, …, O0*. A power supply of +5 V DC is needed by the chip and is Grounded.
What is IC 74138 for?
IC 74LS138 is designed especially for some high-speed works like memory decoders and data transmission systems. It comes up with three enable pins that simplifies the device for inputs from cascading and data reception problems. It is designed with Schottky clamped diodes for High performance.
Which pins are used as extension pins in IC 74138?
There are three enable input pins E1, E2, E3(pin no. 4, 5, 6). E1 and E2 are the active LOW pins that mean when low signals are applied to those pins they will be active.
How many Enable pins for a decoder?
three Enable pins
3 to 8 Decoder/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 role of Enable pin in decoder IC?
In general, enable pin in multiplexers, de multiplexer, decoder and encoder ensures the functioning of the hardware ie “enables” the function of the logic circuit.
What is a 3 to 8 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’.
What is a 4 to 16 decoder?
A 4-to-16 decoder consists of 4 inputs and 16 outputs. Similar to all the decoders discussed above, in this also only one output will be low at a given time and all other outputs are high (using maxterms). The truth table of this type of decoder is shown below.
How can IC 74138 be used as a demultiplexer?
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.
Which of the following enable pins in decoder IC is active high?
74LS138 is used in de-multiplexing applications by using enable pin as data input pin….74LS138 Pin configuration.
| Pin | Name | Description |
|---|---|---|
| 6 | G1 | Enable input (active HIGH) |
| 7 | Y7 | Output pin 7 |
| 8 | GND | Ground |
| 9 | Y6 | Output pin 6 |
Why enable pin is used?
The enable pin of ON Semiconductor eFuses provides a number of features. With all eFuses, a transistor may be used to force the pin low to disable the output. In addition, it may be left floating if no control of the enable pin is required.
What do enable pins do?
The purpose of an enable pin is to allow disabling the part (or some function of it) when you do not need it.
How many decoders do we take in 74138?
We take the popular 3 to 8 decoder Integrated Circuit 74138. The Integrated Circuit is of 16 pins. We have three input pins which are actively in high state and are classified as I 2, I 1 and I 0.
How many pins are there in an integrated circuit decoder?
Let’s take an Integrated Circuit decoder. We take the popular 3 to 8 decoder Integrated Circuit 74138. The Integrated Circuit is of 16 pins. We have three input pins which are actively in high state and are classified as I 2, I 1 and I 0.
What type of power supply is needed for the 74138?
A power supply of +5 V DC is needed by the chip and is Grounded. Fig. Diagram in functional mode of 74138 The point to be noted that, only one of the lines of output which completely depends on the input pins I 2, I 1, and I 0.
How eprom-7 gets selected after 74138?
Here EPROM-7 gets selected when 74138 is selected and the address A 12 A 11 A 10 turns to 1 1 1. Here EPROM-7 gets selected when 74138 is selected and the address A 12 A 11 A 10 turns to 1 1 1. The lines of address ranging from A9 to A0 selects a particular location in the EPROM-7 after 74138 and here after EPROM-7 gets selected.