DB01 Logic Gates - cgibp.comcgibp.com/data/lab_manual/DB01 Logic Gates Operating.pdf · Logic Gates Operating Manual Ver ... (TTL and CMOS Inverters) ... from external DC power supply

DB01 Logic Gates

Operating Manual Ver.1.1

An ISO 9001 : 2000 company

94-101, Electronic Complex Pardesipura, Indore- 452010, India Tel : 91-731- 2570301/02, 4211100 Fax: 91- 731- 2555643 e mail : [email protected] Website : www.scientech.bz Toll free : 1800-103-5050

mailto:[email protected]

http://www.scientech.bz

DB01

Scientech Technologies Pvt. Ltd. 2

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RoHS Compliance

Scientech Products are RoHS Complied. RoHS Directive concerns with the restrictive use of Hazardous substances (Pb, Cd, Cr, Hg, Br compounds) in electric and electronic equipments. Scientech products are “Lead Free” and “Environment Friendly”. It is mandatory that service engineers use lead free solder wire and use the soldering irons upto (25 W) that reach a temperature of 450°C at the tip as the melting temperature of the unleaded solder is higher than the leaded solder.

DB01 Logic Gates

Table of Contents

1. Introduction 4

2. Theory 5

3. Experiment 1 6 Study of Logic Gates and verify Truth Tables

4. Data Sheet 9 5. Warranty 15

6. List of Accessories 15

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Introduction DB01 is a compact, ready to use Logic Gates experiment board. All Logic Gates incorporated on a single board for verification of their, Truth Table and comparison. It can be used as stand alone unit with external power supply or can be used with Scientech Digital Lab ST2611 which has built in power supply, pulse generator, pulser switches, 8 bits data switches, logic probe, digital display, 8 bits LED display. List of boards :

Model Name DB02 Universal Gate- NAND/NOR

DB03 EX-OR Gate Implementation DB04 Demorgan's Theorem

DB05 EX-OR Gate Application DB06 Code Conversion (Binary to Gray & Gray to Binary)

DB07 Code Conversion (BCD to Excess-3 code)

DB08 Binary Adder -Subtractor

DB09 Encoder - Decoder DB10 Multiplexer – Demultiplexer

DB11 Flip-Flops (R-S, D, J-K, T) DB12 Shift Register (4 bit SIPO)

DB13 4 Bit Synchronous Binary Counter DB15 BCD to 7- Segment Decoder

DB16 Digital to Analog Converter (R-2R ladder) DB17 3 Digit Event Counter

DB21 Fiber Optic Digital Link DB22 Analog to Digital Converter (Counter Type)

DB27 Transfer Characteristics (TTL and CMOS Inverters) DB28 Monostable Multivibrator

DB29 CMOS and Crystal Oscillator DB30 Adder/ Subtracter (4-Bit/8-Bit)

DB31 Decoder/Demultiplexer DB32 Modulo-N programmable counter

DB35 4 BIT Shift Register …and many more

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Theory Logic Gate is a digital circuit with one or more input but only one output. AND, OR, NAND, NOR, NOT, EX-OR Gates are some examples of Logic Gates. Each Gate has one or two binary input variable designated by X & Y and one binary output variable Z. The logic diagram and Truth Table of Logic Gates is shown in experiment section. OR Gate : The OR gate has two or more than two inputs and one output. This operation is represented by a plus sign eg. X +Y= Z is read X or Y is equal to Z meaning that Z=1 if X=1 or if Y=1 or if both X=1 & Y=l. If both X=0 & Y=0 then Z=0.The output voltage of OR Gate is high if any or all of the input voltages are high that is +5 V or 1 (TTL level is used). Logic equation is Z = X + Y (X & Y are inputs & Z is output.) AND Gate : It has two or more than two inputs. This operation is represented by a dot or by absence of an operator eg. X.Y=Z or XY=Z is read X AND Y is equal to Z. The logical operation AND is interpreted to mean that Z=l if and only if X=l and Y=l otherwise Z=0

NOT Gate : It has one input and one output. This operation is represented by prime (bar). For example X= Z is read X not equal to Z" meaning that Z is what X is not. In other words if X=l, then Z=0 but if X= 0 then Z=l.

NAND Gate : It has two inputs & one output. NAND function is compliment of AND function. The bubble on output represents inversion after AND ing. The logic equation is Z = (X.Y)'. The output is high if any of the input is low. NOR Gate : It has two or more than two inputs and one output. The NOR function is complement of OR function .The output is low if any input is high. EX-OR Gate: Exclusive OR Gate has two inputs and one output. The output is high if and only if the two inputs ie. X & Y are different ie. If X=l & Y=0 or X=0 & Y=l otherwise output will be low.

The logic equation is XY' + X'Y = X⊕Y=Z. Note : Refer Truth Tables and logic diagrams shown in experiment section.

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Experiment Objective : Study of Logic Gates and verification of Truth Tables.

Equipments Needed : 1. Digital board DB01.

2. DC power supply+5V from external source or Digital Lab ST2611. 3. Digital multi meter or Digital Lab ST261l.

Logic diagram & Truth Table : (Logic 1 = +5 V & Logic 0 = GND)

X Y Y 0 0 0 0 1 1 1 0 1 1 1 1

.

OR Gate

X Y Y 0 0 0 0 1 0 1 0 0 1 1 1

AND Gate

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X Y Y 0 0 1 0 1 0 1 0 0 1 1 0

NOR Gate

X Z 0 1 1 0

NOT Gate

X Y Y 0 0 1 0 1 1 1 0 1 1 1 0

NAND Gate

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EX-OR Gate

Procedure : 1. Connect +5 V and ground to their indicated position on DB01 experiment board

from external DC power supply or from DC power block of Digital Lab ST2611.

2. Connect inputs 00, 01, 10, 11 as per Truth Table to pin X and Y of AND Gate.

3. Switch on the power supply. 4. Observe output Z of AND Gates on multi meter or on logic probe or on LED

display of Digital Lab ST2611 and prove Truth Tables. 5. Repeat above steps for remaining Logic Gates.

X Y Y 0 0 0 0 1 1 1 0 1 1 1 0

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Data Sheet

General Description : The 74HC/HCT04 are high-speed Si-gate CMOS devices and are pin compatible with low power schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT04 provides six inverting buffers.

Pin out diagram :

(Pin 14 = Vcc = + 5V)

Function Table :

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General Description : The 74HC/HCT00 are high-speed Si-gate CMOS devices and are pin compatible with low power schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT00 provide the 2-input NAND function.

Function Table :

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General Description : The 74HC/HCT32 are high-speed Si-gate CMOS devices and are pin compatible with low power schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT32 provide the 2-input OR function.

Function Table :

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General Description : The 74HC/HCT08 are high-speed Si-gate CMOS devices and are pin compatible with low power schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT08 provide the 2-input AND function.

Function Table :

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General Description : This device contains four independent gates each of which performs the logic NOR function.

Function Table :

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Function Table :

H = High voltage level L = Low voltage level

Note : Pull up resistance of 1K is required in open collector ICs to get output.

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Warranty 1. We guarantee the product against all manufacturing defects for 24 months from

the date of sale by us or through our dealers. Consumables like dry cell etc. are not covered under warranty.

2. The guarantee will become void, if

a) The product is not operated as per the instruction given in the operating manual.

b) The agreed payment terms and other conditions of sale are not followed.

c) The customer resells the instrument to another party. d) Any attempt is made to service and modify the instrument.

3. The non-working of the product is to be communicated to us immediately giving full details of the complaints and defects noticed specifically mentioning the type, serial number of the product and date of purchase etc.

4. The repair work will be carried out, provided the product is dispatched securely packed and insured. The transportation charges shall be borne by the customer.

For any Technical Problem Please Contact us at [email protected]

List of Accessories

1. 2 mm Patch Cords (Red) ........................................................................1 No. 2. 2 mm Patch Cord (Black) .......................................................................1 No. 3. 2 mm Patch Cord (Blue) ....................................................................... 3 Nos.

4. e-Manual.................................................................................................1 No.

Updated 05-02-2009

mailto:[email protected]

Documents

DB01 Logic Gates - cgibp.comcgibp.com/data/lab_manual/DB01 Logic Gates Operating.pdf · Logic Gates Operating Manual Ver ... (TTL and CMOS Inverters) ... from external DC power supply