SN54ALS244B, SN54AS244, SN74ALS244B, SN74AS244

OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS

SDAS142 – D2661, DECEMBER 1982 – REVISED JULY 1987

POST OFFICE BOX 655303

Copyright

1

Memory Address Registers

Outline Packages, Ceramic Chip Carriers,

and Standard Plastic and Ceramic 300-mil

DIPs

Reliability

description

These octal buffers and 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.

Taken

together

with

the

’ALS240A,

’ALS241A, ’AS240, and ’AS241, these devices

provide the choice of selected combinations of

inverting outputs, symmetrical G (active-low input

control) inputs, and complementary G and G

inputs.

The –1 version of the SN74ALS244B is identical

to

the

standard

version

except

that

the

48

mA.

There

is

no

–1

version

of

the

SN54ALS244B.

The SN54ALS244B and SN54AS244 are characterized for operation over the full military temperature range

of – 55

°C to 125°C. The SN74ALS244B and SN74AS244 are characterized for operation from 0°C to 70°C.

19

11

13

15

17

2G

2A1

2A2

2A3

2A4

9

7

5

3

2Y1

2Y2

2Y3

2Y4

EN

EN

1Y4

1Y3

1Y2

1Y1

12

14

16

18

1A4

1A3

1A2

1A1

1G

8

6

4

2

1

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

IEC Publication 617-12.

1Y4

1Y3

1Y2

1Y1

12

14

16

18

1A4

1A3

1A2

1A1

1G

8

6

4

2

1

2A4

2A3

2A2

2A1

2G

17

15

13

11

19

1Y4

1Y3

1Y2

1Y1

3

5

7

9

Pin numbers are for DW, J, and N packages.

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.

SN54ALS244B, SN54AS244 ...J PACKAGE

SN74ALS244B, SN74AS244 . . . DW OR N PACKAGE

(TOP VIEW)

SN54ALS244B, SN54AS244 . . . FK PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

1G

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

GND

2G

1Y1

A24

1Y2

2A3

1Y3

2A2

1Y4

2A1

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