5.6 Switching Specifications

Input, tr, tf = 6 ns

PARAMETER

TEST

CONDITIONS

VCC (V)

25

℃

–40

℃ to 85℃

–55

℃ to

125

℃

UNIT

MIN

TYP

MAX

MIN

MAX

MIN

MAX

HC TYPES

tPLH,

tPHL

Propagation delay,

CP to Q

CL = 50 pF

2

160

200

240

ns

4.5

32

40

48

CL = 15 pF

5

13

CL = 50 pF

6

28

34

41

tPLH,

tPHL

Propagation delay,

CP to Q

CL = 50 pF

2

160

200

240

ns

4.5

32

40

48

CL = 15 pF

5

13

CL = 50 pF

6

28

34

41

tPLH,

tPHL

Propagation delay,

R to Q, Q

CL = 50 pF

2

145

180

220

ns

4.5

29

36

44

CL = 15 pF

5

12

CL = 50 pF

6

25

31

38

tTLH,

tTHL

Output transition time

CL = 50 pF

2

75

95

18

110

ns

4.5

15

19

22

6

13

16

19

CI

Input capacitance

10

10

10

pF

CPD

Power dissipation capacitance(1) (2)

5

28

pF

HCT TYPES

tPLH,

tPHL

Propagation delay,

CP to Q

CL = 50 pF

4.5

38

48

57

ns

tPLH,

tPHL

Propagation delay,

CP to Q

CL = 50 pF

4.5

36

45

54

ns

tPLH,

tPHL

Propagation delay,

R to Q, Q

CL = 50 pF

4.5

34

43

51

ns

tTLH,

tTHL

Output transition time

CL = 50 pF

4.5

15

19

22

ns

CI

Input capacitance

10

10

10

pF

CPD

Power dissipation capacitance(1) (2)

5

28

pF

(1)

CPD is used to determine the dynamic power consumption, per flip-flop.

(2)

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

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CD54HC73, CD74HC73, CD74HCT73

SCHS134G – FEBRUARY 1998 – REVISED OCTOBER 2022

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