HD74LS251P 데이터 시트보기 (PDF) - Renesas Electronics

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HD74LS251P

1 of 8 Data Selector / Multiplexer (with strobe and three-state outputs)

Renesas Electronics 

HD74LS251

Function Table

Inputs

Select

C

B

A

X

X

X

L

L

L

L

L

H

L

H

L

L

H

H

H

L

L

H

L

H

H

H

L

H

H

H

Notes: 1. H; high level, L; low level, X; irrelevant

2. Z; high impedance (off-state)

3. D0 through D7; the level of the respective D input.

Strobe

S

H

L

L

L

L

L

L

L

L

Block Diagram

Strobe

(Enable)

D0

D1

D2

Data

D3

Inputs D4

D5

D6

D7

A

Data

Select

B

(Binary)

C

A

A

B

B

C

C

Outputs

Y

W

Z

Z

D0

D0

D1

D1

D2

D2

D3

D3

D4

D4

D5

D5

D6

D6

D7

D7

Output Y

Output W

Absolute Maximum Ratings

Item

Symbol

Ratings

Unit

Supply voltage

VCC

7

V

Input voltage

VIN

7

V

Output voltage (off-state)

Operating temperature

VO (off)

5.5

V

Topr

–20 to +75

°C

Power dissipation

Storage temperature

PT

Tstg

400

mW

–65 to +150

°C

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

Rev.3.00, Jul.15.2005, page 2 of 5

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