SN54HCT157, SN74HCT157

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

SCLS071B – NOVEMBER 1988 – REVISED MAY 1997

3

POST OFFICE BOX 655303

–0.5 V to 7 V

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

±20 mA

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

±20 mA

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

±35 mA

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

±70 mA

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

Package thermal impedance,

113

°C/W

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

N package

78

°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 and output voltage ratings may be exceeded if the input and output current ratings are observed.

2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace

length of zero.

recommended operating conditions

SN54HCT157

SN74HCT157

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

4.5

5

5.5

V

VIH

High-level input voltage

VCC = 4.5 V to 5.5 V

2

2

V

VIL

Low-level input voltage

VCC = 4.5 V to 5.5 V

0

0.8

0

0.8

V

VI

Input voltage

0

VCC

0

VCC

V

VO

Output voltage

0

VCC

0

VCC

V

tt

Input transition (rise and fall) time

0

500

0

500

ns

TA

Operating free-air temperature

–55

125

–40

85

°C

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

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

SN54HCT157

SN74HCT157

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

VOH

VI =VIH or VIL

IOH = –20 µA

45 V

4.4

4.499

4.4

4.4

V

VOH

VI = VIH or VIL

IOH = –6 mA

4.5 V

3.98

4.3

3.7

3.84

V

VOL

VI =VIH or VIL

IOL = 20 µA

45 V

0.001

0.1

0.1

0.1

V

VOL

VI = VIH or VIL

IOL = 6 mA

4.5 V

0.17

0.26

0.4

0.33

V

II

VI = VCC or 0

5.5 V

±0.1

±100

±1000

±1000

nA

ICC

VI = VCC or 0,

IO = 0

5.5 V

8

160

80

µA

∆ICC‡

One input at 0.5 V or 2.4 V,

Other inputs at 0 or VCC

5.5 V

1.4

2.4

3

2.9

mA

Ci

4.5 V

to 5.5 V

3

10

10*

10

pF

* On products compliant to MIL-PRF-38535, this parameter is not production tested.

‡ This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC.

PRODUCT PREVIEW information concerns products in the formative or

design phase of development. Characteristic data and other

specifications are design goals. Texas Instruments reserves the right to

change or discontinue these products without notice.