HD74LS244 参数 Datasheet PDF下载

HD74LS244

Function Table

Inputs

G

H

L

L

A

X

H

L

Output

Y

Z

H

L

Note: H; high level, L; low level, X; irrelevant, Z; off (high-impedance) state of a 3-state output

Block Diagram (1/2)

A

1

A

2

A

3

A

4

G

Y

1

Y

2

Y

3

Y

4

Absolute Maximum Ratings

Item

Supply voltage

Input voltage

Power dissipation

Storage temperature

Symbol

V

CC

V

IN

P

T

Tstg

Ratings

7

7

400

–65 to +150

Unit

V

V

mW

°C

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

Recommended Operating Conditions

Item

Supply voltage

Output current

Operating temperature

Symbol

V

CC

I

OH

I

OL

Topr

Min

4.75

—

—

–20

Typ

5.00

—

—

25

Max

5.25

–15

24

75

Unit

V

mA

mA

°C

Rev.2.00, Feb.18.2005, page 2 of 5