5.6 Switching Characteristics

tr, tf = 6 ns

PARAMETER

VCC (V)

25

℃

–40

℃ to 85℃

–55

℃ to 125℃

UNIT

MIN

TYP

MAX

MIN

MAX

MIN

MAX

HC TYPES

tPLH, tPHL

Propagation delay,

CLK to Q, Q

2

175

220

265

ns

4.5

14

(3)

35

44

53

6

30

37

45

tPLH, tPHL

Propagation delay,

PRE to Q, Q

2

155

195

235

ns

4.5

13

(3)

31

39

47

6

26

33

40

tPLH, tPHL

Propagation delay,

CLR to Q, Q

2

180

225

270

ns

4.5

15

(3)

36

45

54

6

31

38

46

tTLH, tTHL

Output transition time

2

75

95

110

ns

4.5

15

19

22

6

13

16

19

CI

Input capacitance

10

10

10

pF

fMAX

CLK frequency

5

60

(3)

MHz

CPD

Power dissipation

capacitance(1) (2)

5

12

(4)

pF

HCT TYPES

tPLH, tPHL

Propagation delay,

CLK to Q, Q

4.5

14

(3)

35

44

53

ns

tPLH, tPHL

Propagation delay,

PRE to Q, Q

4.5

13

(3)

32

40

48

ns

tPLH, tPHL

Propagation delay,

CLR to Q, Q

4.5

14

(3)

37

46

56

ns

tTLH, tTHL

Output transition time

4.5

15

19

22

ns

CI

Input capacitance

10

10

10

pF

fMAX

CLK frequency

5

60

(3)

MHz

CPD

Power dissipation

capacitance(1) (2)

5

20

(4)

pF

(1)

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

(2)

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

(3)

CL = 15 pF and VCC = 5 V.

(4)

VCC = 5 V.

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SCHS141J – MARCH 1998 – REVISED OCTOBER 2022

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