5.4 Electrical Characteristics (continued)

PARAMETER

TEST

CONDITIONS

(2)

VCC (V)

25

℃

–40

℃ to 85℃

–55

℃ to 125℃

UNIT

MIN

TYP

MAX

MIN

MAX

MIN

MAX

ΔICC (1)

Additional quiescent

device current per

input pin

CLR input held at

VCC –2.1

4.5 to

5.5

100

540

675

735

μA

Data inputs held at

VCC –2.1

4.5 to

5.5

100

144

180

196

μA

CLK inputs held at

VCC –2.1

4.5 to

5.5

100

540

675

735

μA

(1)

For dual-supply systems theoretical worst case (VI = 2.4 V, VCC = 5.5 V) specification is 1.8mA.

(2)

VI = VIH or VIL, unless otherwise noted.

5.5 Prerequisite for Switching Characteristics

See Parameter Measurement Information

PARAMETER

VCC (V)

25

℃

–40

℃ to 85℃

–55

℃ to 125℃

UNIT

MIN

TYP

MAX

MIN

MAX

MIN

MAX

HC TYPES

fMAX

Maximum clock frequency

2

6

5

4

MHz

4.5

30

25

20

6

35

29

23

tW

CLR pulse width

2

60

75

90

ns

4.5

12

15

18

6

10

13

15

tW

Clock pulse width

2

80

100

120

ns

4.5

16

20

24

6

14

17

20

tSU

Set-up time data to clock

2

60

75

70

ns

4.5

12

15

18

6

10

13

15

tH

Hold time, data to clock

2

3

3

3

ns

4.5

3

3

3

6

3

3

3

tREM

Removal time, CLR to clock

2

50

65

75

ns

4.5

10

13

15

6

9

11

13

HCT TYPES

fMAX

Maximum clock frequency

4.5

25

20

16

MHz

tw

CLR pulse width

4.5

12

15

18

ns

tw

Clock pulse width

4.5

20

25

30

ns

tSU

Set-up time data to clock

4.5

12

15

18

ns

tH

Hold time, data to clock

4.5

3

3

3

ns

tREM

Removal time, CLR to clock

4.5

10

13

15

ns

CD54HC273, CD74HC273

CD54HCT273, CD74HCT273

SCHS174C – FEBRUARY 1998 – REVISED JANUARY 2022

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