1

FEATURES

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(MarkedasBL180A)

SN65LBC180AN(Markedas65LBC180A)

SN75LBC180AD(MarkedasLB180A)

SN75LBC180AN(Markedas75LBC180A)

(TOP VIEW)

NC −Nointernalconnection

Pins6and7areconnectedtogetherinternally

Pins13and14areconnectedtogetherinternally

DESCRIPTION

SN65LBC180A

SN75LBC180A

LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS

2

• High-Speed Low-Power LinBICMOS™ Circuitry

30 Mbps

• Bus-Pin ESD Protection 15 kV HBM

• Low Disabled Supply-Current Requirements:

700

µA Maximum

• Designed for High-Speed Multipoint Data

Transmission Over Long Cables

• Common-Mode Voltage Range of –7 V to 12 V

• Low Supply Current: 15 mA Max

• Compatible With ANSI Standard TIA/EIA-485-A

and ISO 8482:1987(E)

• Positive and Negative Output Current Limiting

• Driver Thermal Shutdown Protection

(1)

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.

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.

DRIVER

RECEIVER

DIFFERENTIAL INPUTS

ENABLE

OUTPUT

OUTPUTS

INPUT

ENABLE

A – B

RE

R

D

DE

Y

Z

L

H

H

H

H

L

L

?

L

H

L

H

L

L

X

L

Z

Z

X

H

Z

OPEN

H

H

L

Open circuit

L

H

(1)

H = high level, L = low level, ? = indeterminate, X = irrelevant, Z = high impedance (off)

1

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.

2

LinBICMOS is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2000–2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.