7

HCT TYPES

Propagation Delay

Clock to I/O Output,

Clock to Q0 and Q7

4.5

-

-

45

-

56

-

68

ns

5

-

19

-

-

-

-

-

ns

MR to Output

4.5

-

-

46

-

58

-

69

ns

Output Enable and Disable

Times

5

-

10,

13, 15

--

-

-

-

ns

Output High-Z to High Level

4.5

-

-

32

-

40

-

48

ns

Output High Level to High-Z

4.5

-

-

37

-

46

-

56

ns

Output Low Level to High-Z

4.5

-

-

32

-

40

-

48

ns

Output High-Z to Low Level

4.5

-

-

30

-

38

-

45

ns

Output Transition Time

Q0, Q7

4.5

-

-

15

-

19

-

22

ns

4.5

-

-

12

-

15

-

18

ns

Input Capacitance

-

10

-

10

-

10

-

10

pF

Three-State Output

Capacitance

-

-

20

-

20

-

20

-

20

pF

Power Dissipation Capacitance

(Notes 3, 4)

5

-

170

-

-

-

-

-

pF

NOTES:

PARAMETER

SYMBOL

TEST

CONDITIONS

UNITS

MIN

TYP

MAX

MIN

MAX

MIN

MAX

Test Circuits and Waveforms

FIGURE 1. HC CLOCK PULSE RISE AND FALL TIMES AND

PULSE WIDTH

FIGURE 2. HCT CLOCK PULSE RISE AND FALL TIMES AND

PULSE WIDTH

CLOCK

90%

50%

10%

GND

50%

50%

10%

I

CLOCK

2.7V

1.3V

0.3V

GND

3V

1.3V

1.3V

0.3V

I

CD54HC299, CD74HC299, CD54HCT299, CD74HCT299