5.5 Switching Characteristics

over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (See Figure 6)

PARAMETER

FROM

(INPUT)

TO (OUTPUT)

VCC

(V)

TA = 25°C

SN54HC258

SN74HC258

UNIT

MIN

TYP

MAX

MIN

MAX

MIN

MAX

tpd

Propagation delay

A or B

Any Y

2

60

100

150

125

ns

4.5

13

20

30

25

6

12

17

25

21

A/B

Any Y

2

60

115

175

145

4.5

13

23

35

29

6

12

20

30

25

ten

Enable time

G

Any Y

2

70

150

225

190

ns

4.5

15

30

45

38

6

13

26

38

32

tdis

Diable time

G

Any Y

2

75

150

225

190

ns

4.5

15

30

45

38

6

13

26

38

32

tt

Transition time

Any Y

2

28

60

90

75

ns

4.5

8

12

18

15

6

6

10

15

13

5.5 Switching Characteristics

over recommended operating free-air temperature range, CL = 150 pF (unless otherwise noted) (See Figure 6)

PARAMETER

FROM

(INPUT)

TO (OUTPUT)

VCC

(V)

TA = 25°C

SN54HC258

SN74HC258

UNIT

MIN

TYP

MAX

MIN

MAX

MIN

MAX

tpd

Propagation delay

A or B

Any Y

2

95

150

245

190

ns

4.5

23

30

45

38

6

21

26

38

32

A/B

Any Y

2

95

165

240

210

4.5

23

33

48

42

6

21

28

41

36

ten

Enable time

G

Any Y

2

100

200

300

250

ns

4.5

24

40

60

50

6

18

34

51

43

tt

Transition time

Any Y

2

45

210

315

265

ns

4.5

17

42

63

53

6

13

36

53

45

5.6 Operating Characteristics

TA = 25°C

Test Conditions

TYP

UNIT

Cpd

Power dissipation capacitance per multiplexer

No load

40

pF

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SN54HC257, SN54HC258, SN74HC257, SN74HC258

SCLS224C – DECEMBER 1982 – REVISED MARCH 2022

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