SN54HC4040, SN74HC4040

12BIT ASYNCHRONOUS BINARY COUNTERS

SCLS160D − DECEMBER 1982 − REVISED SEPTEMBER 2003

4

POST OFFICE BOX 655303

timing requirements over recommended operating free-air temperature range (unless otherwise

noted)

VCC

TA = 25°C

SN54HC4040

SN74HC4040

UNIT

VCC

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

2 V

5.5

3.7

4.3

fclock

Clock frequency

4.5 V

28

19

22

MHz

fclock

Clock frequency

6 V

33

22

25

MHz

2 V

90

135

115

CLK high or low

4.5 V

18

27

23

tw

Pulse duration

CLK high or low

6 V

15

23

20

ns

tw

Pulse duration

2 V

70

105

90

ns

CLR high

4.5 V

14

21

18

CLR high

6 V

12

18

15

2 V

60

90

75

tsu

Setup time, CLR inactive before CLK

↓

4.5 V

12

18

15

ns

tsu

Setup time, CLR inactive before CLK

↓

6 V

10

15

13

ns

(unless otherwise noted) (see Figure 1)

PARAMETER

FROM

TO

VCC

TA = 25°C

SN54HC4040

SN74HC4040

UNIT

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

2 V

5.5

10

3.7

4.3

fmax

4.5 V

28

45

19

22

MHz

fmax

6 V

33

53

22

25

MHz

2 V

62

150

225

190

tpd

CLK

QA

4.5 V

16

30

45

38

ns

tpd

CLK

QA

6 V

12

26

38

32

ns

2 V

63

140

210

175

tPHL

CLR

Any

4.5 V

17

28

42

35

ns

tPHL

CLR

Any

6 V

13

24

36

30

ns

2 V

28

75

110

95

tt

Any

4.5 V

8

15

22

19

ns

tt

Any

6 V

6

13

19

16

ns

PARAMETER

TEST CONDITIONS

TYP

UNIT

Cpd

Power dissipation capacitance

No load

88

pF