SN54ALS857 . . . JT PACKAGE

SN74ALS857 . . . DW OR NT PACKAGE

(TOP VIEW)

SN54ALS857 . . . FK PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

S0

1A

1B

1Y

2A

2B

2Y

3A

3B

3Y

OPER = 0

GND

S1

6A

6B

6Y

5A

5B

5Y

4A

4B

4Y

COMP

NC – No internal connection

32 1 28 27

12 13

5

6

7

8

9

10

11

25

24

23

22

21

20

19

6B

6Y

5A

NC

5B

5Y

4A

1Y

2A

2B

NC

2Y

3A

3B

426

14 15 16 17 18

SN54ALS857, SN74ALS857

HEX 2-TO-1 UNIVERSAL MULTIPLEXERS

WITH 3-STATE OUTPUTS

SDAS170A – DECEMBER 1982 – REVISED JANUARY 1995

Copyright

1

POST OFFICE BOX 655303

A or B Operand

Operands

System Bus

Small-Outline (DW) Packages, Ceramic

Chip Carriers (FK), and Standard Plastic

(NT) and Ceramic (JT) 300-mil DIPs

description

The

′ALS857 are hextuple 2-line to 1-line

multiplexers with 3-state outputs. The devices can

provide either true (COMP low) or inverted

(COMP high) data at the Y outputs. In addition, the

′ALS857 perform the logical AND function (A • B)

and the clear function as well. The four modes of

operation are:

In either of the first two modes, OPER = 0 is high

if all the selected A or B inputs are low. The six Y

outputs and the OPER = 0 output are all 3-state

SN54ALS857 and SN74ALS857, respectively. All

outputs can be placed in the high-impedance state

by applying a high level to the COMP, S0, and S1

inputs simultaneously.

The SN54ALS857 is characterized for operation over the full military temperature range of – 55

°C to 125°C. The

SN74ALS857 is characterized for operation from 0

°C to 70°C.

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.