Chapter 6 -- Introduction to Sequential Devices

3/23/99


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Table of Contents

Chapter 6 -- Introduction to Sequential Devices

The Sequential Circuit Model

State Tables and State Diagrams

Sequential Circuit Example

TTL Memory Elements

SR Latch Characteristics

Latch and Flip-flop Timing

Set Latch

Reset Latch

Set-Reset Latch (SR latch)

NAND SR Latch

Set-Reset Latch Timing Diagram

SR Latch Propagation Delays

SN74279 Latch with Two Set Inputs

Gated SR Latch

Gated SR Latch Characteristics

Delay Latch (D latch)

D Latch Characteristics

D Latch Timing Diagram

D Latch Timing Constraints

Pulse-Triggered JK Flip-Flop Characteristics

Pulse-Triggered JK Flip Realization

The SN7476 Dual Pulse-Triggered JK Flip-Flop

SN7474 Dual Positive-Edge-Triggered D Flip-Flop

SN7474 Excitation Table

SN7474 Flip-Flop Timing Specifications

Summary of Latch and Flip-Flop Characteristics

Author: Dr Bill Carroll