SN74LVC16244ADGGR 参数 Datasheet PDF下载

SN74LVC16244A

16-BIT BUFFER/DRIVER

WITH 3-STATE OUTPUTS

SCAS699 – AUGUST 2003 – REVISED MARCH 2005

www.ti.com

DESCRIPTION/ORDERING INFORMATION (CONTINUED)

This device is fully specified for partial-power-down applications using I

off

. The I

off

circuitry disables the outputs,

preventing damaging current backflow through the device when it is powered down.

To ensure the high-impedance state during power up or power down, OE should be tied to V

CC

through a pullup

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

GQL PACKAGE

(TOP VIEW)

1

A

B

C

D

E

F

G

H

J

K

2

3

4

5

6

TERMINAL ASSIGNMENTS

(1)

1

A

B

C

D

E

F

G

H

J

K

1OE

1Y2

1Y4

2Y2

2Y4

3Y1

3Y3

4Y1

4Y3

4OE

2

NC

1Y1

1Y3

2Y1

2Y3

3Y2

3Y4

4Y2

4Y4

NC

GND

V

CC

GND

NC

GND

V

CC

GND

NC

3

NC

GND

V

CC

GND

4

NC

GND

V

CC

GND

5

NC

1A1

1A3

2A1

2A3

3A2

3A4

4A2

4A4

NC

6

2OE

1A2

1A4

2A2

2A4

3A1

3A3

4A1

4A3

3OE

(1)

GRD OR ZRD PACKAGE

(TOP VIEW)

1

A

B

C

D

E

F

G

H

J

2

3

4

5

6

NC – No internal connection

TERMINAL ASSIGNMENTS

(1)

1

A

B

C

D

E

F

G

H

J

1Y1

1Y3

2Y1

2Y3

3Y1

3Y3

4Y1

4Y3

4Y3

2

NC

1Y1

1Y4

2Y2

2Y4

3Y2

3Y4

4Y2

NC

3

1OE

NC

V

CC

GND

GND

GND

V

CC

NC

4OE

4

2OE

NC

V

CC

GND

GND

GND

V

CC

NC

3OE

5

NC

1A2

1A4

2A2

2A4

3A2

3A4

4A2

NC

6

1A1

1A3

2A1

2A3

3A1

3A3

4A1

4A3

4A4

(1)

NC – No internal connection

FUNCTION TABLE

(EACH 4-BIT BUFFER)

INPUTS

OE

L

L

H

A

H

L

X

OUTPUT

Y

H

L

Z

2