SN65LBC180A, SN75LBC180A

LOW POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS

SLLS378C − MAY 2000 − REVISED JUNE 2002

1

POST OFFICE BOX 655303

up to 30 Mbps

HBM

Requirements . . . 700

µA Maximum

Transmission Over Long Cables

−7 V to 12 V

TIA/EIA-485-A and ISO 8482:1987(E)

Limiting

description

The

SN65LBC180A

and

SN75LBC180A

differential driver and receiver pairs are monolithic

integrated circuits designed for bidirectional data

communication over long cables that take on the

characteristics of transmission lines. They are

balanced, or differential, voltage mode devices

that

are

compatible

with

ANSI

standard

TIA/EIA-485-A and ISO 8482:1987(E). The A

version offers improved switching performance

over

its

predecessors

without

sacrificing

significantly more power.

These devices combine a differential line driver and differential input line receiver and operate from a single 5-V

power supply. 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 when powered off

for point-to-point or multipoint data bus applications. The devices also provide positive and negative current

limiting for protection from line fault conditions. The SN65LBC180A is characterized for operation from − 40

°C

to 85

°C, and the SN75LBC180A is characterized for operation from 0°C to 70°C.

† Signaling rate by TIA/EIA-485-A definition restrict transition times to 30% of the bit duration, and much higher signaling rates may be achieved

without this requirement as displayed in the TYPICAL CHARACTERISTICS of this device.

Copyright

 2002, 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.

NC − No internal connection

INPUT

D

H

L

X

Open

ENABLE

DE

H

H

L

H

OUTPUTS

Y

Z

H

L

L

H

Z

Z

H

L

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

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

SN65LBC180AD (Marked as BL180A)

SN65LBC180AN (Marked as 65LBC180A)

SN75LBC180AD (Marked as LB180A)

SN75LBC180AN (Marked as 75LBC180A)

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