Chapter 6 -- Introduction to Sequential Devices

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Table of Contents

Chapter 6 -- Introduction to Sequential Devices

The Sequential Circuit Model

Models for Sequential Circuits

State Tables and State Diagrams

Example 6.1 State tables and Diagrams

Example 6.1 (continued)

Example sequential circuit

Memory Devices

Table 6.1 TTL Memory Elements [1]

Set-reset latch

NAND SR Latch

SR Latch Timing Diagrams

Set-Reset Latch Timing Diagram

Delay Parameters

Delay Parameters (continued)

SR Latch Propagation Delays

SR Latch Excitation Table and Characteristic Equation

SR Latch: Characteristic Equation (continued)

SR latch characteristics

Gated SR Latch

Gated SR Latch (continued)

Gated SR Latch

Gated SR Latch (continued)

Gated SR Latch Characteristics

Delay Latch

Delay Latch (D latch)

D Latch Characteristics

D Latch (continued)

D Latch Timing Diagram

D Latch (continued)

D Latch (continued)

D Latch Timing Constraints

Flip-Flops

Master-Slave SR Flip-Flops

Master-Slave SR Flip-Flops (continued)

Master-slave SR flip-flop

PPT Slide

Excitation Table and Characteristic Equation

SR Master-Slave Flip-Flop Characteristics

Master-Slave D Flip-Flops

Master-Slave D Flip-Flop

PPT Slide

Master-Slave JK Flip-Flops

PPT Slide

JK Flip-Flops (continued)

Pulse-Triggered JK Flip-Flop Realization

7476 Dual Pulse-triggered JK Flip-Flop Module

The SN7476 Dual Pulse-Triggered JK Flip-Flop

Edge-triggered D Flip-Flops

7474 Dual Positive-edge-triggered D Flip-Flop Module

PPT Slide

SN7474 Excitation Table

Edge-triggered Flip-flop Timing Characteristics

PPT Slide

T Flip-flops

Negative-Edge-Triggered T Flip-Flop

Edge-Triggered T Flip-Flop Characteristics

Clocked T Flip-flops

Clocked T Flip-Flop

Excitation Table for Clocked T Flip-Flops

PPT Slide

Table 6.3 Summary of Latch and Flip-Flop Characteristics

Author: Dr Bill Carroll