SN54F257, SN74F257

QUADRUPLE 2LINE TO 1LINE DATA SELECTORS/MULTIPLEXERS

WITH 3STATE OUTPUTS

SDFS065A − D2932, MARCH 1987 − REVISED OCTOBER 1993

2−4

POST OFFICE BOX 655303

POST OFFICE BOX 1443

switching characteristics (see Note 3)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 5 V,

CL = 50 pF,

R1 = 500

Ω,

R2 = 500

Ω,

TA = 25°C

VCC = 4.5 V to 5.5 V,

CL = 50 pF,

R1 = 500

Ω,

R2 = 500

Ω,

TA = MIN to MAX†

UNIT

′F257

SN54F257

SN74F257

MIN

TYP

MAX

MIN

MAX

MIN

MAX

tPLH

A or B

Any Y

2.2

4.1

6

2.2

8

2.2

7

ns

tPHL

A or B

Any Y

1.2

3.8

5.5

1

8

1.2

6.5

ns

tPLH

A/B

Any Y

3.7

9.7

13

3.7

15.5

3.7

15

ns

tPHL

A/B

Any Y

2.7

6.1

8.5

2.7

10.5

2.7

9.5

ns

tPZH

G

Any Y

2.2

5.5

7.5

2.2

9.5

2.2

8.5

ns

tPZL

G

Any Y

2.2

5.1

7.5

2.2

10

2.2

8.5

ns

tPHZ

G

Any Y

1.2

3.9

6

1.2

7

1.2

7

ns

tPLZ

G

Any Y

1.2

4.1

6

1.2

9.5

1.2

7

ns

† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

NOTE 3: Load circuits and waveforms are shown in Section 1.