SN54AS756, SN74AS756, SN74AS757

OCTAL BUFFERS AND LINE DRIVERS

WITH OPEN-COLLECTOR OUTPUTS

SDAS040B – DECEMBER 1983 – REVISED JANUARY 1995

Copyright

1

POST OFFICE BOX 655303

Buffer Memory Address Registers

Protection

′AS241

Small-Outline (DW) Packages, Ceramic

Chip Carriers (FK), and Standard Plastic (N)

and Ceramic (J) 300-mil DIPs

description

These octal buffers and line drivers are designed

specifically to improve the performance and

density of 3-state memory address drivers, clock

drivers,

and

bus-oriented

receivers

and

transmitters by eliminating the need for 3-state

overlap protection. The 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 SN54AS756 is characterized for operation

over the full military temperature range of – 55

°C

to 125

°C. The SN74AS756 and SN74AS757 are

characterized for operation from 0

°C to 70°C.

2

1A1

4

1A2

6

1A3

8

1A4

EN

1

1Y1

18

1Y2

16

1Y3

14

1Y4

12

11

2A1

13

2A2

15

2A3

17

2A4

EN

19

2Y1

9

2Y2

7

2Y3

5

2Y4

3

1OE

2OE

′AS756

2

1A1

4

1A2

6

1A3

8

1A4

EN

1

1Y1

18

1Y2

16

1Y3

14

1Y4

12

11

2A1

13

2A2

15

2A3

17

2A4

EN

19

2OE

2Y1

9

2Y2

7

2Y3

5

2Y4

3

1OE

SN74AS757

‡ These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

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

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

SN54AS756 ...J PACKAGE

SN74AS756, SN74AS757 . . . 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

SN54AS756 . . . FK PACKAGE

(TOP VIEW)

† 2OE for

′AS756 or 2OE for SN74AS757

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.