SN54ALS157A, SN54ALS158

SN74ALS157A, SN74ALS158, SN74AS157, SN74AS158

QUAD 1-OF-2 DATA SELECTORS/MULTIPLEXERS

SDAS081C – APRIL 1982 – REVISED DECEMBER 1994

6

POST OFFICE BOX 655303

7 V

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

7 V

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

0

°C to 70°C

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

Storage temperature range

– 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.

recommended operating conditions

SN74AS157

SN74AS158

UNIT

MIN

NOM

MAX

VCC

Supply voltage

4.5

5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

IOH

High-level output current

–2

mA

IOL

Low-level output current

20

mA

TA

Operating free-air temperature

0

70

°C

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

SN74AS157

SN74AS158

UNIT

MIN

TYP‡

MAX

VIK

VCC = 4.5 V,

II = – 18 mA

– 1.2

V

VOH

VCC = 4.5 V to 5.5 V,

IOH = – 2 mA

VCC –2

V

VOL

VCC = 4.5 V,

IOL = 20 mA

0.35

0.5

V

II

A/B

VCC =5 5V

VI =7V

0.2

mA

II

A, B, or G

VCC = 5.5 V,

VI = 7 V

0.1

mA

IIH

A/B

VCC =5 5V

VI =2 7V

40

µA

IIH

A, B, or G

VCC = 5.5 V,

VI = 2.7 V

20

µA

IIL

A/B

VCC =5 5V

VI =0 4V

–1

mA

IIL

A, B, or G

VCC = 5.5 V,

VI = 0.4 V

– 0.5

mA

IO§

VCC = 5.5 V,

VO = 2.25 V

–30

–112

mA

ICC

SN74AS157

VCC =5 5V

17.5

28

mA

ICC

SN74AS158

VCC = 5.5 V

15.6

22.5

mA

‡ All typical values are at VCC = 5 V, TA = 25°C.

§ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.