What is IC 74138 for?

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 total Active low pins are there in IC 74138?

As you see in the below pin diagram, the IC 74LS138 has a total of sixteen pins.

How can IC 74138 be used as 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.

How many active low pins are there in ic74ls138?

The enable pins are two active low & one active high.

Which IC used for 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.

How many 74LS138 decoders are required to generate CS signals?

The 74LS138 requires 12ns to decode. The 8088 runs at 5MHz and only allows 460ns for memory to access data. A wait state adds 200ns of additional time.

How many inputs are required for a decoder with 16 outputs?

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. Thus, number of inputs is 4.

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.

What is the purpose of using an IC with TTL?

It is intended to function in high-performance memory-decoding or data-routing applications, requiring very short propagation delay times. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers.

How many input and output pins are there in a microcontroller?

The device takes 3 input data and converts it to 8-bit data. This chip is high used in decoding in memory to minimize the effect of decoding. The chip includes three enable pin, three input pins, and 8 output pins.

What is ICIC 74ls138?

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.