SN54AS885, SN74AS885

8-BIT MAGNITUDE COMPARATORS

SDAS236A – DECEMBER 1982 – REVISED JANUARY 1995

7

POST OFFICE BOX 655303

APPLICATION INFORMATION

1

23

15

16

17

18

19

20

21

22

3

2

11

10

9

8

7

6

5

4

13

14

P > QOUT

P < QOUT

′AS885

L/A

PLE

P0

P1

P2

P3

P4

P5

P6

P7

P > QIN

P < QIN

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

H or L

Latch

Enable

1

23

15

16

17

18

19

20

21

22

3

2

11

10

9

8

7

6

5

4

13

14

P > QOUT

P < QOUT

′AS885

L/A

PLE

P0

P1

P2

P3

P4

P5

P6

P7

P > QIN

P < QIN

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

1

23

15

16

17

18

19

20

21

22

3

2

11

10

9

8

7

6

5

4

13

14

P > QOUT

P < QOUT

′AS885

L/A

PLE

P0

P1

P2

P3

P4

P5

P6

P7

P > QIN

P < QIN

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

LSP

MSP

MSB

LSB

MSB

24 Bit

24.4 ns

Typical

16 Bit

19 ns

Typical

Figure 2. Fastest Cascading Arrangement for Comparing 16-Bit or 24-Bit Words