† This symbol is in accordance with ANSI/IEEE Std 91-1984

and IEC Publication 617-12.

Pin numbers shown are for the DW, JT, and NT packages.

2A4

2A3

2A2

2A1

2G

1A4

1A3

1A2

1A1

1G

2Y4

2Y3

2Y2

2Y1

1Y4

1Y3

1Y2

1Y1

12

11

10

9

4

3

2

1

14

15

16

17

13

EN

20

21

22

23

24

EN

1

1

54AC11240, 74AC11240

OCTAL BUFFERS/LINE DRIVERS

WITH 3-STATE OUTPUTS

SCAS169 – MAY 1987 – REVISED APRIL 1993

POST OFFICE BOX 655303

Copyright

2–1

PCB Layout

Minimize High-Speed Switching Noise

CMOS) 1-

mm Process

at 125

°C

Outline Packages, Plastic Shrink

Small-Outline Packages, Ceramic Chip

Carriers, and Standard Plastic and Ceramic

300-mil DIPs

description

These octal buffers/line drivers are designed

specifically to improve both the performance and

density of 3-state memory address drivers, clock

drivers, and bus-oriented receivers and transmit-

ters. These devices provide inverting outputs and

symmetrical G (active-low output control) inputs.

These devices feature high fan-out and improved

fan-in.

The 54AC11240 is characterized for operation

over the full military temperature range of – 55

°C

to 125

°C. The 74AC11240 is characterized for

operation from – 40

°C to 85°C.

FUNCTION TABLE

(each buffer)

INPUTS

OUTPUT

G

A

Y

L

H

L

L

LH

H

X

Z

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

1Y1

1Y2

1Y3

1Y4

GND

GND

GND

GND

2Y1

2Y2

2Y3

2Y4

1G

1A1

1A2

1A3

1A4

2A1

2A2

2A3

2A4

2G

54AC11240 . . . JT PACKAGE

74AC11240 . . . DB, DW OR NT PACKAGE

(TOP VIEW)

32 1

13 14

5

6

7

8

9

10

11

2A3

2A4

2G

NC

2Y4

2Y3

2Y2

1A2

1A1

1G

NC

1Y1

1Y2

1Y3

4

15 16 17 18

54AC11240 . . . FK PACKAGE

(TOP VIEW)

28 27 26

25

24

23

22

21

20

19

12

NC – No internal connection

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

EPIC is a trademark of Texas Instruments Incorporated.