SN75ALS174A

QUADRUPLE DIFFERENTIAL LINE DRIVER

SLLS122E – JULY 1991 – REVISED APRIL 1998

1

POST OFFICE BOX 655303

ANSI EIA/TIA-422-B and RS-485

Circuitry

Both Serial and Parallel Applications

Long Bus Lines in Noisy Environments

55 mA Max

Bus Voltage Ranges

Limiting

description

The SN75ALS174A is a quadruple line driver with

3-state differential outputs. It is designed to meet

the

requirements

of

ANSI

Standards

EIA/TIA-422-B and RS-485. This device is

optimized

for

balanced

multipoint

bus

transmission at rates of up to 20 Mbit/s. Each

driver features wide positive and negative

common-mode output voltage ranges that make

them suitable for party-line applications in noisy

environments.

The SN75ALS174A provides positive- and negative-current limiting and thermal shutdown for protection from

line fault conditions on the transmission bus line. Shutdown occurs at a junction temperature of

approximately 150

°C.

The SN75ALS174A is characterized for operation from 0

°C to 70°C.

FUNCTION TABLE

(each driver)

INPUT

ENABLES

OUTPUTS

A

ENABLES

Y

Z

H

H

H

L

L

H

L

H

X

L

Z

Z

H = high level, L = low level, X = irrelevant,

Z = high impedance (off)

Copyright

© 1998, Texas Instruments Incorporated

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.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

DW PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

1A

1Y

NC

1Z

1,2EN

2Z

NC

2Y

2A

GND

4A

4Y

NC

4Z

3,4EN

3Z

NC

3Y

3A

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

1A

1Y

1Z

1,2EN

2Z

2Y

2A

GND

4A

4Y

4Z

3,4EN

3Z

3Y

3A

N PACKAGE

(TOP VIEW)

NC – No internal connection