SN55LBC174

QUADRUPLE LOW POWER DIFFERENTIAL LINE DRIVER

SGLS082A − MARCH 1995 − REVISED JULY 2004

1

POST OFFICE BOX 655303

Transmission on Long Bus Lines in Noisy

Environments

Ten Million Transfers Per Second

−7 V to 12 V

(Output Disabled)

description

The SN55LBC174 is composed of monolithic

quadruple differential line drivers with 3-state

outputs. This device is designed to meet the

requirements

of

the

Electronics

Industry

Association (EIA) Standard RS-485 and is

optimized

for

balanced

multipoint

bus

transmission at data rates up to and exceeding 10

million bits per second. Each driver features wide

positive and negative common-mode output

voltage

ranges,

current

limiting,

and

thermal-shutdown protection making it suitable

for party-line applications in noisy environments.

This device is designed using LinBiCMOS

,

facilitating ultra-low power consumption and

inherent robustness.

The SN55LBC174 provides positive and negative-current limiting and thermal shutdown for protection from line

fault conditions on the transmission bus line. This device offers optimum performance when used with the

SN55LBC173 quadruple line receiver. The SN55LBC174 is available in the 16-pin CDIP package (J), the 16-pin

CPAK (W), or the 20-pin LCCC package (FK).

The SN55LBC174 is characterized for operation over the military temperature range of − 55

°C to 125°C.

FUNCTION TABLE

(each driver)

INPUT

ENABLE

OUTPUTS

INPUT

ENABLE

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

 2004, 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.

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

J OR W PACKAGE

(TOP VIEW)

NC − No internal connection

FK PACKAGE

(TOP VIEW)

19

20

1

32

17

18

16

15

14

13

12

11

9

10

5

4

6

7

8

4Y

4Z

NC

3, 4EN

3Z

1Z

1, 2EN

NC

2Z

2Y

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.

On products compliant to MILPRF38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.

LinBiCMOS is a trademark of Texas Instruments Incorporated.