SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A

OCTAL BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SDAS214E – DECEMBER 1982 – REVISED AUGUST 2002

1

POST OFFICE BOX 655303

Memory Address Registers

description/ordering information

These

octal

buffers/drivers

are

designed

specifically to improve both the performance and

density of 3-state memory address drivers, clock

drivers,

and

bus-oriented

receivers

and

transmitters. When these devices are used with

the ’ALS241, ’AS241A, ’ALS244, and ’AS244A

devices, the circuit designer has a choice of

selected

combinations

of

inverting

and

noninverting outputs, symmetrical active-low

output-enable (OE) inputs, and complementary

OE and OE inputs. These devices feature high

fan-out and improved fan-in.

The -1 version of SN74ALS240A is identical to the

standard version, except that the recommended

no -1 version of the SN54ALS240A.

ORDERING INFORMATION

TA

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

SN74ALS240AN

SN74ALS240AN

PDIP – N

Tube

SN74ALS240A-1N

SN74ALS240A-1N

SN74AS240AN

SN74AS240AN

Tube

SN74ALS240ADW

ALS240A

Tape and reel

SN74ALS240ADWR

ALS240A

SOIC

DW

Tube

SN74ALS240A-1DW

ALS240A 1

0

°C to 70°C

SOIC – DW

Tape and reel

SN74ALS240A-1DWR

ALS240A-1

Tube

SN74AS240ADW

AS240A

Tape and reel

SN74AS240ADWR

AS240A

SOP

NS

Tape and reel

SN74ALS240ANSR

ALS240A

SOP – NS

Tape and reel

SN74ALS240A-1NSR

ALS240A-1

SSOP

DB

Tape and reel

SN74ALS240ADBR

G240A

SSOP – DB

Tape and reel

SN74ALS240A-1DBR

G240A-1

† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are

available at www.ti.com/sc/package.

Copyright

 2002, Texas Instruments Incorporated

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.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

1OE

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

GND

2OE

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

SN54ALS240A, SN54AS240A ...J OR W PACKAGE

SN74ALS240A . . . DB, DW, N, OR NS PACKAGE

SN74AS240A . . . DW OR N PACKAGE

(TOP VIEW)

3

2

1 20 19

910 11 12 13

4

5

6

7

8

18

17

16

15

14

1Y1

2A4

1Y2

2A3

1Y3

1A2

2Y3

1A3

2Y2

1A4

SN54ALS240A, SN54AS240A . . . FK PACKAGE

(TOP VIEW)

On products compliant to MIL-PRF-38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.