5.6 Switching Characteristics

over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Parameter Measurement

Information)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC (V)

TA = 25°C

SN54HC259

SN74HC259

UNIT

MIN

TYP

MAX

MIN

MAX

MIN

MAX

tPHL

CLR

Any Q

2

60

150

225

190

ns

4.5

18

30

45

38

6

14

26

38

32

tpd

Data

Any Q

2

56

130

195

165

ns

4.5

17

26

39

33

6

13

22

33

28

Address

Any Q

2

74

200

300

250

4.5

21

40

60

50

6

17

34

51

43

G

Any Q

2

66

170

255

215

4.5

20

34

51

43

6

16

29

43

37

tt

Any

2

28

75

110

95

ns

4.5

8

15

22

19

6

6

13

19

16

5.7 Operating Characteristics

TA = 25℃

PARAMETER

TEST CONDITIONS

TYP

UNIT

Cpd

Power dissipation capacitance per latch

No load

33

pF

SN54HC259, SN74HC259

SCLS134F – DECEMBER 1982 – REVISED MARCH 2022

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