FlipFlops and Related Devices

1
Digital Fundamentals
CHAPTER 7Latches, Flip-Flops and Timers
2
Latches

• S-R latch

3
Latches
4
Latches

• Gated S-R latch

5
Latches

• Gated D latch

6
Edge-Triggered Flip-Flops

• Edge-triggered D flip-flop

7
Edge-Triggered Flip-Flops

• Edge-triggered D flip-flop

8
Edge-Triggered Flip-Flops

• Edge-triggered J-K flip-flop

9
Edge-Triggered Flip-Flops

• Edge-triggered J-K flip-flop

10
Flip-Flop Operating Characteristics

• Propagation delay times
• Set-up time
• Hold time
• Maximum clock frequency

11
Flip-Flop Applications

• Parallel data storage

12
Flip-Flop Applications

• Frequency division

13
Flip-Flop Applications

• Counting

14
The 555 Timer
15
The 555 Timer

• Monostable (one-shot) operation
• Astable operation

16
The 555 Timer

• Monostable (one-shot) operation

17
The 555 Timer

• Astable operation