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Absolute Maximum Ratings

(1)

Recommended Operating Conditions

(1)

SN54LVC257A, SN74LVC257A

QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS

WITH 3-STATE OUTPUTS

SCAS294N – JANUARY 1993 – REVISED JUNE 2005

over operating free-air temperature range (unless otherwise noted)

MIN

MAX

UNIT

Supply voltage range

–0.5

6.5

V

–0.5

6.5

V

–0.5

V

Input clamp current

–50

mA

Output clamp current

–50

mA

Continuous output current

±50

mA

±100

mA

73

82

θ

JA

Package thermal impedance

64

°C/W

108

39

Storage temperature range

–65

150

°C

(1)

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.

(2)

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

(3)

(4)

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

(5)

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

SN54LVC257A

SN74LVC257A

UNIT

MIN

MAX

MIN

MAX

Operating

2

3.6

1.65

3.6

Supply voltage

V

Data retention only

1.5

1.5

High-level input voltage

1.7

V

2

2

Low-level input voltage

0.7

V

0.8

0.8

Input voltage

0

5.5

0

5.5

V

Output voltage

0

0

V

–4

–8

High-level output current

mA

–12

–12

–24

–24

4

8

Low-level output current

mA

12

12

24

24

∆t/∆v

Input transition rise or fall rate

10

10

ns/V

Operating free-air temperature

–55

125

–40

85

°C

(1)

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

3