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

What is the principle of locality, What is "the principle of locality"? ...

What is "the principle of locality"? It's the nature of the processes that they refer only to the small subset of the total data space of the process. I.e. the process frequ

What is visibility give uml notation, What is visibility give UML notation?...

What is visibility give UML notation? Visibility refers to the ability of a process to reference a feature from another class and has possible valued of public, private, protec

Quantifiers and variables - propositional model, Quantifiers and Variables ...

Quantifiers and Variables - propositional model: There is one question is arrives that 'What do sentences containing variables mean?' In other way of words, how does a first-o

Stack, The Stack A procedure call is supported by a stack. So let's dis...

The Stack A procedure call is supported by a stack. So let's discuss stack in assembly. Stacks are 'Last In First Out' data structures and are used for storing return addresses

Define memory latency, Define Memory Latency? It is used to refer to th...

Define Memory Latency? It is used to refer to the amount of time it takes to transfer a word of data to or from the memory.

What are bags and sequences, What are bags and sequences? A bag is a co...

What are bags and sequences? A bag is a collection of elements with duplicates permitted.  A sequence is an ordered collection of elements with duplicates permitted.

What is uml, ? UML is called as Unified Modeling Language. ? it is used...

? UML is called as Unified Modeling Language. ? it is used to Graphical language for visualizing artifacts of the system. ? It Allow to make a blue print of all the aspects

Desirable characteristics of an electronic market place, What are the desir...

What are the desirable characteristics of an Electronic Market Place?  Characteristics of an Electronic Market Place:  a. Its electronic, the business center is not a phys

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