CHAPTER 1 : INTRODUCTION

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Presentation transcript:

CHAPTER 1 : INTRODUCTION EKT 121 / 4 ELEKTRONIK DIGIT 1 CHAPTER 1 : INTRODUCTION

3.0 LOGIC GATES Inverter (Gate Not) AND Gate OR Gate NAND Gate NOR Gate Exclusive-OR and Exclusive-NOR Fixed-function logic: IC Gates

Introduction Three basic logic gates AND Gate – expressed by “ . “ OR Gates – expressed by “ + “ sign (not an ordinary addition) NOT Gate – expressed by “ ‘ “ or “¯”

NOT Gate (Inverter) a) Gate Symbol & Boolean Equation b) Truth Table (Jadual Kebenaran) c) Timing Diagram (Rajah Pemasaan)

OR Gate a) Gate Symbol & Boolean Equation b) Truth Table (Jadual Kebenaran) c) Timing Diagram (Rajah Pemasaan)

AND Gate a) Gate Symbol & Boolean Equation c) Timing Diagram (Rajah Pemasaan) b) Truth Table (Jadual Kebenaran)

a) Gate Symbol, Boolean Equation NAND Gate a) Gate Symbol, Boolean Equation & Truth Table b) Timing Diagram

a) Gate Symbol, Boolean Equation NOR Gate a) Gate Symbol, Boolean Equation & Truth Table b) Timing Diagram

a) Gate Symbol, Boolean Equation Exclusive-OR Gate a) Gate Symbol, Boolean Equation & Truth Table b) Timing Diagram

IC Gates : Fixed Function Logic Three digital integrated circuit (IC) technology : 1) CMOS most widely used 2) TTL 3) ECL - specific applications Note: Complementary Metal-Oxide Semiconductor (CMOS) Transistor-Transistor Logic (TTL) Emiter-Couple Logic (ECL)

CMOS Series ICs 5 volt category : 74HC and 74HCT High-speed CMOS 74AC and 74ACT Advanced CMOS 74AHC and 74AHCT Advanced High-speed CMOS 3.3 volt category : 74LV Low-voltage CMOS 74LVC Low-voltage CMOS 74 ALVC Advanced Low-voltage CMOS 4000 series CMOS : BiCMOS combine TTL with CMOS 74BCT BiCMOS 74ABT Advanced BiCMOS 74LVT Low-voltage BiCMOS 74ALB Advanced Low-Voltage BiCMOS

TTL series logic gates 74 standard TTL (no letter) - eg : 7404 74S Schottky TTL – eg : 74S04 74AS Advanced Schottky TTL – eg : 74AS04 74LS Low-power Schottky TTL – eg : 74LS04 74ALS Advanced Low-power Schottky TTL – eg : 74ALS04 74F Fast TTL – eg : 74F04

DIP and SOIC packages

AND gate NOT gate Examples : Logic Gates IC Note : x is referring to family/technology (eg : AS/ALS/HCT/AC etc.)

Performance Characteristics and Parameters Propagation delay Time High-speed logic has a short pdt. DC Supply Voltage (VCC) Power Dissipation Lower power diss means less current from dc supply Input and Output Logic Levels Speed-Power product Fan-Out and Loading

Universality of Gates AND Gate

NOR Gate

END OF SLIDES