SN54HCT257, SN74HCT257

QUADRUPLE 2LINE TO 1LINE DATA SELECTORS/MULTIPLEXERS

WITH 3STATE OUTPUTS

SCLS072D − NOVEMBER 1988 − REVISED SEPTEMBER 2003

4

POST OFFICE BOX 655303

(unless otherwise noted) (see Figure 1)

PARAMETER

FROM

TO

VCC

TA = 25°C

SN54HCT257

SN74HCT257

UNIT

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

A or B

Y

4.5 V

20

30

45

38

tpd

A or B

Y

5.5 V

17

27

40

34

ns

tpd

A/B

Y

4.5 V

20

30

45

38

ns

A/B

Y

5.5 V

17

27

40

34

ten

OE

Y

4.5 V

20

30

45

38

ns

ten

OE

Y

5.5 V

17

27

40

34

ns

tdis

OE

Y

4.5 V

20

30

45

38

ns

tdis

OE

Y

5.5 V

17

27

40

34

ns

tt

Any

4.5 V

8

15

22

19

ns

tt

Any

5.5 V

7

14

21

17

ns

(unless otherwise noted) (see Figure 1)

PARAMETER

FROM

TO

VCC

TA = 25°C

SN54HCT257

SN74HCT257

UNIT

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

A or B

Y

4.5 V

22

38

57

48

tpd

A or B

Y

5.5 V

19

35

53

44

ns

tpd

A/B

Y

4.5 V

22

38

57

48

ns

A/B

Y

5.5 V

19

35

53

44

ten

OE

Y

4.5 V

23

40

60

50

ns

ten

OE

Y

5.5 V

20

38

57

48

ns

tt

Any

4.5 V

17

42

63

53

ns

tt

Any

5.5 V

14

38

57

48

ns

PARAMETER

TEST CONDITIONS

TYP

UNIT

Cpd

Power dissipation capacitance

No load

13

pF

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