SN65LBC180Q1

LOW POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIR

SGLS251A − JULY 2004 − REVISED JUNE 2008

1

POST OFFICE BOX 655303

Transmission Over Long Cables

as 30 ns

Standard RS-485 and ISO 8482:1987(E)

−7 V to 12 V

Driver Damage From Bus Contention

Limiting

description

The SN65LBC180 differential driver and receiver

pair is a monolithic integrated circuit designed for

bidirectional data communication over long

cables that take on the characteristics of

transmission lines. It is a balanced, or differential,

voltage mode device that meets or exceeds the

requirements of industry standards ANSI RS-485

and ISO 8482:1987(E). The device is designed

using TI’s proprietary LinBiCMOS

 with the low

power consumption of CMOS and the precision

and robustness of bipolar transistors in the same

circuit.

The SN65LBC180 combines a differential line

driver and receiver with 3-state outputs and

operates from a single 5-V supply. The driver and

receiver have active-high and active-low enables,

respectively, which can be externally connected to

function as a direction control. The driver

differential outputs and the receiver differential

inputs are connected to separate terminals for

full-duplex operation and are designed to present

minimum loading to the bus whether disabled or

common-mode voltage range making it suitable

for

point-to-point

or

multipoint

data-bus

applications.

Copyright

 2008 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.

LinBiCMOS is a trademark of Texas Instruments Incorporated.

1

2

3

4

5

6

7

14

13

12

11

10

9

8

NC

R

RE

DE

D

GND

GND

A

B

Z

Y

NC

D PACKAGE

(TOP VIEW)

NC − No internal connection

logic diagram (positive logic)

R

RE

D

DE

B

A

Z

Y

11

12

10

9

2

3

5

4

INPUT

D

H

L

X

ENABLE

DE

H

H

L

OUTPUTS

Y

Z

H

L

L

H

Z

Z

DRIVER

DIFFERENTIAL INPUTS

A− B

VID ≥ 0.2 V

− 0.2 V < VID < 0.2 V

VID ≤ − 0.2 V

X

Open circuit

ENABLE

RE

L

L

L

H

L

OUTPUT

R

H

?

L

Z

H

RECEIVER

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

Z = high impedance (off)

Function Tables