Download D2_Compare and contrast two different types of logic family

NAME
UNIT 35
PRINCIPLES AND APPLICATIONS OF ELECTRONIC DEVICES AND CIRCUITS
ASSESSMENT CRITERIA
D2
COMPLETE
(Y/N)
FEEDBACK
Compare and contrast
two different
types of logic family with
reference to
five characteristics.
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I understand that if any part of the work submitted for this assignment is found to be plagiarised, none of the work
submitted will be allowed to count towards the assessment of the assignment
Signed ………………………………………………………………… Date …………………………………………
Our Lady & St John Vocational Centre
BTEC National Subsidiary Diploma in Engineering
1
NAME
Unit 35
PRINCIPLES AND APPLICATIONS OF ELECTRONIC DEVICES AND CIRCUITS
Assignment 1
D1 - Compare and contrast two different types of logic family with reference to
five characteristics.
TTL (Transistor-Transistor-Logic) and CMOS (Complimentary Metal Oxide
Semi-Conductor) are the two main families of microchips. In each of the
families there are a range of IC’s that perform tasks such as counters/ timers/
comparators/ decoders/ logic and man more.
The logic chips include:-
AND/ OR/ NOT/ NAND/ NOR/ XOR
TTL chips usually start with 74……..
CMOS chips start with 40……….
These are arranged in packages of either single/ double/ quad
Both TTL and CMOS have advantages and disadvantages in respect to voltage/
output current/ arrangement.
Assignment Advice
 Select some common Logic chips from the TTL and CMOS families
 Compare the functions of the chips
 Compare the characteristics of the chips according to:1) Speed / performance
2) Type of Power supplies required
3) Power consumption
4) Naming convention
5) Using in circuits (Input protection, ease of building as a prototype,
fault finding, handling and storage
 Determine which would be more suitable in modern applications
References
http://www.kpsec.freeuk.com/components/74series.htm
http://www.kpsec.freeuk.com/components/cmos.htm
Our Lady & St John Vocational Centre
BTEC National Subsidiary Diploma in Engineering
2
NAME
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Our Lady & St John Vocational Centre
BTEC National Subsidiary Diploma in Engineering
3