SN54HC161, SN74HC161

4BIT SYNCHRONOUS BINARY COUNTERS

SCLS297D − JANUARY 1996 − REVISED SEPTEMBER 2003

7

POST OFFICE BOX 655303

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

SN54HC161

SN74HC161

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

2 V

1.9

1.998

1.9

1.9

IOH = −20 µA

4.5 V

4.4

4.499

4.4

4.4

VOH

VI = VIH or VIL

IOH = −20 µA

6 V

5.9

5.999

5.9

5.9

V

VOH

VI = VIH or VIL

IOH = −4 mA

4.5 V

3.98

4.3

3.7

3.84

V

IOH = −5.2 mA

6 V

5.48

5.8

5.2

5.34

2 V

0.002

0.1

0.1

0.1

IOL = 20 µA

4.5 V

0.001

0.1

0.1

0.1

VOL

VI = VIH or VIL

IOL = 20 µA

6 V

0.001

0.1

0.1

0.1

V

VOL

VI = VIH or VIL

IOL = 4 mA

4.5 V

0.17

0.26

0.4

0.33

V

IOL = 5.2 mA

6 V

0.15

0.26

0.4

0.33

II

VI = VCC or 0

6 V

±0.1

±100

±1000

±1000

nA

ICC

VI = VCC or 0,

IO = 0

6 V

8

160

80

µA

Ci

2 V to 6 V

3

10

10

10

pF

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

noted)

VCC

TA = 25°C

SN54HC161

SN74HC161

UNIT

VCC

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

2 V

6

4.2

5

fclock

Clock frequency

4.5 V

31

21

25

MHz

fclock

Clock frequency

6 V

36

25

29

MHz

2 V

80

120

100

CLK high or low

4.5 V

16

24

20

tw

Pulse duration

CLK high or low

6 V

14

20

17

ns

tw

Pulse duration

2 V

80

120

100

ns

CLR low

4.5 V

16

24

20

CLR low

6 V

14

20

17

2 V

150

225

190

A, B, C, or D

4.5 V

30

45

38

A, B, C, or D

6 V

26

38

32

2 V

135

205

170

LOAD low

4.5 V

27

41

34

tsu

Setup time before CLK

↑

LOAD low

6 V

23

35

29

ns

tsu

Setup time before CLK

↑

2 V

170

255

215

ns

ENP, ENT

4.5 V

34

51

43

ENP, ENT

6 V

29

43

37

2 V

125

190

155

CLR inactive

4.5 V

25

38

31

CLR inactive

6 V

21

32

26

2 V

0

0

0

th

Hold time, all synchronous inputs after CLK

↑

4.5 V

0

0

0

ns

th

Hold time, all synchronous inputs after CLK

6 V

0

0

0

ns