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

 

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

Posted Date: 5/4/2013 5:52:52 AM | Location : United States

Ask an Expert

Related Discussions:- How 74147 series ttl can be used as a decimal-to-bcd encoder, Assignment Help, Ask Question on How 74147 series ttl can be used as a decimal-to-bcd encoder, Get Answer, Expert's Help, How 74147 series ttl can be used as a decimal-to-bcd encoder Discussions

Write discussion on How 74147 series ttl can be used as a decimal-to-bcd encoder
Your posts are moderated

Write your message here..

Related Questions

Explain addressing modes in risc, Q. Explain Addressing modes in RISC? ... Q. Explain Addressing modes in RISC? Simple addressing modes: Another benefit is the use of simple addressing modes. RISC machines employ simple register addressing having disp

What is demand paging, What is major difference between the Historic Unix a... What is major difference between the Historic Unix and the new BSD release of Unix System V in terms of Memory Management? Historic Unix uses Swapping - Whole process is tran

What are the different layers in r/3 system, What are the different layers ... What are the different layers in R/3 system? There are three layer:- Presentation Layer. Application Layer. Database Layer.

Make a generalize program to performs r-ary subtraction, Q. Make a genera... Q. Make a generalize program that performs r-ary subtraction on two numbers using (r-1)'s and r's complement? Use input and output files.

Application area of artificial intelligence, 1. The State of the Art: What ... 1. The State of the Art: What can AI do today? A concise answer is difficult because there are so many activities in so many subfields. Here we sample a few applications other

How music is produced and generated - cad, How music is produced and genera... How music is produced and generated - CAD Computer software and hardware advances have changed how music is produced and generated. Some of the primary reasons for this have

Explain the concept of generalization, Explain the concept of Generalizatio... Explain the concept of Generalization Generalization and inheritance are powerful abstractions for sharing the structure and/or behaviour of more than one class.  Generalizati

Explain applications of parallel processing, APPLICATIONS OF PARALLEL PROCE... APPLICATIONS OF PARALLEL PROCESSING Parallel computing is an development of sequential computing which tries to emulate what has always been the condition of affairs in natural

Ending transactions - data phase, Ending transactions: Either side may... Ending transactions: Either side may request that a burst end after the present data phase. Simple PCI component that do not support multi-word bursts will always request this

Compare ss7 architecture with seven-layer osi architecture, Compare the arc... Compare the architecture of SS7 with seven-layer OSI architecture The relationship among these levels and the layers of the OSI model is demonstrated in figure. The user part i