How 74147 series ttl can be used as a decimal-to-bcd encoder, Computer Engineering

Assignment Help:

Illustrate how 74147 series TTL can be used as a decimal-to-BCD encoder.

Ans. Available IC in 74 series is 74147 that is a priority encoder. Such IC has active low inputs and outputs. The significance of the word priority can be realized from the truth table. For example if 2 and 5 are low, the output will be consequent to 5 that has a higher priority than 2 that is the highest numbered input has priority over lower numbered inputs.

While an exact number is to be fed to the digital circuit in BCD code, then the switch consequent to which number is pressed.

Truth table of 74147

Active low decimal input's                                                           Active low BCD

outputs

1

2

3

4

5

6

7

8

9

D

C

B

A

1

1

1

1

1

1

1

1

1

1

1

1

1

0

1

1

1

1

1

1

1

1

1

1

1

0

X

0

1

1

1

1

1

1

1

1

1

0

1

X

X

0

1

1

1

1

1

1

1

1

0

0

X

X

X

0

1

1

1

1

1

1

0

1

1

X

X

X

X

0

1

1

1

1

1

0

1

0

X

X

X

X

1

0

1

1

1

1

0

0

1

X

X

X

X

1

1

0

1

1

1

0

0

0

X

X

X

X

X

X

X

0

1

0

1

1

1

X

X

X

X

X

X

X

X

0

0

1

1

0

 

1372_74147 series TTL used as a decimal-to-BCD encoder.png

74147 series TTL used as a decimal-to-BCD encoder


Related Discussions:- How 74147 series ttl can be used as a decimal-to-bcd encoder

Term memory as used in a computer context initially, Term memory as used in...

Term memory as used in a computer context initially The term memory as used in a computer context initially referred to magnetic core memory devices which were used beginning

Explain use of mpi functions with an example, Q. Explain use of MPI functio...

Q. Explain use of MPI functions with an example? include int main(int argc, char **argv) { int i, tmp, sum, s, r, N, x[100]; MPI_Init(&argc, &argv); MPI_Comm_size

Example of circuit switching & stored and forward switching, Example of cir...

Example of circuit switching and S&F (Stored and Forward) switching is (A) Telephone and Post of Telegraph (B) Video Signal Post or Telegraph (C)  Digital Signal P

Illustrate associative memory, Q. Illustrate Associative Memory? The ti...

Q. Illustrate Associative Memory? The time required to find an item which is stored in memory can be decreased significantly if stored data can be identified for access by cont

Explain what is data mining, What is data mining? Data Mining: It...

What is data mining? Data Mining: It is an analytic process designed to explore data and after that to validate the findings through applying the detected patterns to lat

Paged virtual memory - computer architecture, Paged virtual memory: Mo...

Paged virtual memory: Mostly all implementations of virtual memory divide the virtual address space of an application program into pages; a page is a block that contains conti

What are the different types of parameters, What are the different types of...

What are the different types of parameters? Formal Parameters: Parameters, which are described during the definition of subroutine with the FORM statement.

Define structural classification, Structural Classification Flynn's cla...

Structural Classification Flynn's classification explains the behavioural idea and doesn't take concern into the computer's structure. Parallel computers can be categorized bas

Advantage and disadvantage of threaded binary trees, Advantage  1.     ...

Advantage  1.       By doing threading we neglect the recursive method of traversing a Tree , which makes use of stack and consumes many memory and time . 2.       The node

Define formal language grammar, Define formal language grammar? A forma...

Define formal language grammar? A formal language grammar is a set of formation rules which describe that strings made by the alphabet of a formal language are syntactically va

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd