SN54HC259, SN74HC259

8-BIT ADDRESSABLE LATCHES

SCLS134B – DECEMBER 1982 – REVISED MAY 1997

7

POST OFFICE BOX 655303

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

noted)

VCC

TA = 25°C

SN54HC259

SN74HC259

UNIT

VCC

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

2 V

80

120

100

CLR low

4.5 V

16

24

20

t

Pulse duration

6 V

14

20

17

ns

tw

Pulse duration

2 V

80

120

100

ns

G low

4.5 V

16

24

20

6 V

14

20

17

↑

2 V

75

115

95

tsu

Setup time, data or address before G

↑

4.5 V

15

23

19

ns

6 V

13

20

16

↑

2 V

5

5

5

th

Hold time, data or address after G

↑

4.5 V

5

5

5

ns

6 V

5

5

5

(unless otherwise noted) (see Figure 1)

PARAMETER

FROM

TO

VCC

TA = 25°C

SN54HC259

SN74HC259

UNIT

PARAMETER

(INPUT)

(OUTPUT)

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

2 V

60

150

225

190

tPHL

CLR

Any Q

4.5 V

18

30

45

38

ns

6 V

14

26

38

32

2 V

56

130

195

165

Data

Any Q

4.5 V

17

26

39

33

6 V

13

22

33

28

2 V

74

200

300

250

tpd

Address

Any Q

4.5 V

21

40

60

50

ns

6 V

17

34

51

43

2 V

66

170

255

215

G

Any Q

4.5 V

20

34

51

43

6 V

16

29

43

37

2 V

28

75

110

95

tt

Any

4.5 V

8

15

22

19

ns

6 V

6

13

19

16

PARAMETER

TEST CONDITIONS

TYP

UNIT

Cpd

Power dissipation capacitance per latch

No load

33

pF