SN54AS882A, SN74AS882A

32-BIT LOOK-AHEAD CARRY GENERATORS

SDAS235 – D2661, DECEMBER 1982 – REVISED NOVEMBER 1985

POST OFFICE BOX 655303

Copyright

1

’AS1181, ’AS881B, and ’AS1881 ALUs

Outline Packages, Both Plastic and

Ceramic Chip Carriers, and Standard

Plastic and Ceramic 300-mil DIPs

Group of Eight 4-Bit Binary Adders

n-Bit Adders

Than 6 ns

Reliability

description

The ’AS882A is a high-speed look-ahead carry

generator capable of anticipating the carry across

a group of eight 4-bit adders permitting the

designer to implement look-ahead for a 32-bit ALU

with a single package or, by cascading ’AS882As,

full look-ahead is possible across n-bit adders.

The SN54AS882A is characterized for operation

over the full military temperature range of – 55

°C

to 125

°C. The SN74AS882A is characterized for

operation from 0

°C to 70°C.

’AS882A LOGIC EQUATIONS

=

+ P5P4P3P2G1 + P5P4P3P2P1G0

+ P7P6P5P4G3 + P7P6P5P4P3G2

+ P7P6P5P4P3P2G1 + P7P6P5P4P3P2P1G0

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

G0

P0

G1

P1

G2

P2

G3

P3

GND

NC

P7

G7

P6

G6

P5

G5

P4

G4

SN54AS882A . . . JT PACKAGE

SN74AS882A . . . DW OR NT PACKAGE

(TOP VIEW)

32 1

13 14

5

6

7

8

9

10

11

P7

G7

P6

NC

G6

P5

G1

P1

NC

G2

P2

G3

4

15 16 17 18

SN54AS882A . . . FK PACKAGE

SN74AS882A . . . DW OR NT 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.