SN54LVC257A, SN74LVC257A

QUADRUPLE 2LINE TO 1LINE DATA SELECTORS/MULTIPLEXERS

WITH 3STATE OUTPUTS

SCAS294N − JANUARY 1993 − REVISED OCTOBER 2003

3

POST OFFICE BOX 655303

−0.5 V to 6.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−0.5 V to 6.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±100 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance,

73

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(see Note 3): DB package

82

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(see Note 3): NS package

64

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(see Note 3): PW package

108

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(see Note 4): RGY package

39

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

1. The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.

2. The value of VCC is provided in the recommended operating conditions table.

3. The package thermal impedance is calculated in accordance with JESD 51-7.

4. The package thermal impedance is calculated in accordance with JESD 51-5.

recommended operating conditions (see Note 5)

SN54LVC257A

SN74LVC257A

UNIT

MIN

MAX

MIN

MAX

UNIT

VCC

Supply voltage

Operating

2

3.6

1.65

3.6

V

VCC

Supply voltage

Data retention only

1.5

1.5

V

VCC = 1.65 V to 1.95 V

0.65

× VCC

VIH

High-level input voltage

VCC = 2.3 V to 2.7 V

1.7

V

VIH

High-level input voltage

VCC = 2.7 V to 3.6 V

2

2

V

VCC = 1.65 V to 1.95 V

0.35

× VCC

VIL

Low-level input voltage

VCC = 2.3 V to 2.7 V

0.7

V

VIL

Low-level input voltage

VCC = 2.7 V to 3.6 V

0.8

0.8

V

VI

Input voltage

0

5.5

0

5.5

V

VO

Output voltage

0

VCC

0

VCC

V

VCC = 1.65 V

−4

IOH

High-level output current

VCC = 2.3 V

−8

mA

IOH

High-level output current

VCC = 2.7 V

−12

−12

mA

VCC = 3 V

−24

−24

VCC = 1.65 V

4

IOL

Low-level output current

VCC = 2.3 V

8

mA

IOL

Low-level output current

VCC = 2.7 V

12

12

mA

VCC = 3 V

24

24

∆t/∆v

Input transition rise or fall rate

10

10

ns/V

TA

Operating free-air temperature

−55

125

−40

85

°C

NOTE 5: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,

Implications of Slow or Floating CMOS Inputs, literature number SCBA004.