HD74LS157P 查看數據表（PDF） - Renesas Electronics

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HD74LS157P

Quadruple 2-line-to-1-line Data Selectors / Multiplexers (noninverted outputs)

Renesas Electronics 

HD74LS157

Function Table

Inputs

Strobe

Select

A

H

X

X

L

L

L

L

L

H

L

H

X

L

H

X

H ; high level, L ; low level, X ; irrelevant

Block Diagram

1A

1B

2A

Data

2B

Inputs 3A

3B

4A

4B

Strobe G

Select S

Output

B

Y

X

L

X

L

X

H

L

L

H

H

1Y

2Y

Outputs

3Y

4Y

Absolute Maximum Ratings

Item

Symbol

Ratings

Supply voltage

VCC

7

Input voltage

VIN

7

Power dissipation

PT

400

Storage temperature

Tstg

–65 to +150

Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.

Recommended Operating Conditions

Item

Supply voltage

Output current

Operating temperature

Symbol

VCC

IOH

IOL

Topr

Min

4.75

—

—

–20

Typ

5.00

—

—

25

Max

5.25

–400

8

75

Unit

V

V

mW

°C

Unit

V

µA

mA

°C

Rev.2.00, Feb.18.2005, page 2 of 6

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