Complete PCB Design Using OrCad Capture and Layout

Appendix D: Rise and Fall Times for Various Logic Families

Logic family

Transition Time (ns)

Rank (fastest)

RT

FT

BiCMOS

ABT

1.6

1.4

14

BCT

0.7

0.7

12

LVT

2.7

2.8

29

CMOS

AC

1.7

1.5

15

ACT

1.7

1.5

25

ACQ

2.4

2.4

16

ACTQ

2.5

2.4

27

AHCT

2.4

2.4

26

C

35

25

39

FCT

1.5

1.2

13

HC

3.6

4.1

33

HCT

4.6

3.9

34

LCX

2.9

2.4

28

LV

3.0

3.0

30

LVQ

3.5

3.2

31

LVX

4.8

3.7

35

VCX

2.0

2.0

20

VHC

4.1

3.2

32

ECL

10K

2.2

2.2

22

10KH

1.7

1.7

17

100K

0.6

0.6

11

300K

0.5

0.5

10

E

0.38

0.38

8

EP

0.11

0.11

6

LVEL

0.22

0.22

3

EL

0.23

0.23

5

SiGe-2.5 V

0.02

0.02

1

SiGe-3.3 V

0.3

0.03

2

GaAs

0.3

0.1

4

LVDS

0.3

0.3

7

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