5.5 Switching Characteristics

Input tt = 6ns. Unless otherwise specified, CL = 50pF. (See Parameter Measurement Information)

PARAMETER

VCC (V)

25

℃

-40

℃ to 85℃

-55

℃ to 125℃

UNIT

MIN

TYP

MAX

MIN

MAX

MIN

MAX

HC TYPES

tpd

Any Data Input to Y

2

170

215

255

ns

4.5

14(3)

34

43

51

6

29

37

43

Any Data Input to W

2

185

230

280

ns

4.5

15(3)

37

46

56

6

31

39

48

Any Select to Y

2

185

230

280

ns

4.5

15(3)

37

46

56

6

31

39

48

Any Select to W

2

205

255

310

ns

4.5

17(3)

41

51

62

6

35

43

53

Enable to Y

2

140

175

210

ns

4.5

11(3)

28

35

42

6

24

30

36

Enable to W

2

145

180

220

ns

4.5

12(3)

29

36

44

6

25

31

38

tt

Output Transition Time

2

75

95

110

ns

4.5

15

19

22

6

13

16

19

CIN

Input Capacitance

10

10

10

pF

CPD

Power Dissipation

Capacitance(1) (2)

5

59

pF

HCT TYPES

tpd

Any Data Input to Y

4.5

16(3)

38

48

57

ns

Any Data Input to W

4.5

15(3)

36

45

54

ns

Any Select to Y

4.5

17 (3)

41

51

62

ns

Any Select to W

4.5

18(3)

43

54

65

ns

Enable to Y

4.5

12(3)

29

36

44

ns

CL = 50 pF

Enable to W

4.5

15(3)

36

46

54

ns

tt

Output Transition Time

4.5

15

19

22

ns

CIN

Input Capacitance

10

10

10

pF

CPD

Power Dissipation

Capacitance(1) (2)

5

58

pF

(1)

CPD is used to determine the dynamic power consumption, per gate.

(2)

PD = VCC 2fi (CPD + CL) where fi = input frequency, CL = output load capacitance, VCC = supply voltage.

(3)

CL = 15 pF and VCC = 5 V

CD54HC151, CD74HC151, CD54HCT151, CD74HCT151

SCHS150D – SEPTEMBER 1998 – REVISED NOVEMBER 2021

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