SN65LBC172A, SN75LBC172A

QUADRUPLE RS485 DIFFERENTIAL LINE DRIVERS

SLLS447C − OCTOBER 2000 − REVISED AUGUST 2008

2

POST OFFICE BOX 655303

description (continued)

These devices are optimized for balanced multipoint bus transmission at signalling rates up to 30 million bits

per second. The transmission media may be printed-circuit board traces, backplanes, or cables. The ultimate

rate and distance of data transfer is dependent upon the attenuation characteristics of the media and the noise

coupling to the environment.

Each driver features current limiting and thermal-shutdown circuitry making it suitable for high-speed mulitpoint

data transmission applications in noisy environments. These devices are designed using LinBiCMOS

t,

facilitating low power consumption and robustness.

The G and G inputs provide driver enable control using either positive or negative logic. When disabled or

powered off, the driver outputs present a high-impedance to the bus for reduced system loading.

The SN75LBC172A is characterized for operation over the temperature range of 0

°C to 70°C. The

SN65LBC172A is characterized over the temperature range from –40

°C to 85°C.

AVAILABLE OPTIONS

PACKAGE

TA

16-PIN PLASTIC

SMALL OUTLINE†

(JEDEC MS-013)

20-PIN PLASTIC

SMALL OUTLINE†

(JEDEC MS-013)

16-PIN PLASTIC

THROUGH-HOLE

(JEDEC MS-001)

0

°C to 70°C

SN75LBC172A16DW

SN75LBC172ADW

SN75LBC172AN

0

°C to 70°C

Marked as 75LBC172A

−40

°C to 85°C

SN65LBC172A16DW

SN65LBC172ADW

SN65LBC172AN

−40

°C to 85°C

Marked as 65LBC172A

† Add R suffix for taped and reeled version.

FUNCTION TABLE

(EACH DRIVER)

INPUT

ENABLES

OUTPUTS

A

G

G

Y

Z

L

H

X

L

H

L

X

L

L

H

H

H

X

H

L

H

X

L

H

L

OPEN

H

X

H

L

OPEN

X

L

H

L

H

OPEN

X

H

L

L

OPEN

X

L

H

X

L

H

Z

Z

X

L

OPEN

Z

Z

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

Z = high impedance (off)