ADM5180

FUNCTIONAL BLOCK DIAGRAM

REV. 0

FEATURES

Eight Differential Line Receivers in One Package

Meets EIA Standard EIA-232E, 423A, 422A and

CCITT V.10, V.11, V.28

Single +5 V Supply

Differential Inputs Withstand

±25 V

Internal Hysteresis

Low Power CMOS –3.5 mA Supply Current

TTL/CMOS Compatible Outputs

Available in 28-Pin DIP and PLCC Packages

Low Power Replacement for UC5180C/NE5180

APPLICATIONS

High Speed Communication

Computer I-O Ports

Peripherals

High Speed Modems

Printers

Logic Level Translation

One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

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Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

Octal, RS-232/RS-423 Line Receiver

GENERAL DESCRIPTION

The ADM5180 is an octal differential line receiver suitable for a

wide range of digital communication systems with data rates up to

200 kB/s. Input signals conforming to EIA Standards 232-E, 422A

and CCITT V.10, V.11, V.28, X.26, and X.27 are accepted and

translated into TTL /CMOS output signal levels.

The ADM5180 is a superior upgrade for the UC5180C and the

NE5180. It is fabricated on an advanced BiCMOS process,

allowing high speed bipolar circuitry to be combined with low

power CMOS. This minimizes the power consumption to less than

25 mW.

A failsafe function ensures a known output state under a variety of

input fault conditions as defined in RS-422A and RS-423A. The

failsafe function is controlled by FS1 and FS2. Each controls four

receivers. With FS = Low and a fault condition the output is forced

low while if FS = High, the output is forced high.

The device is available in both 28-pin DIP and 28-lead PLCC

packages.

Truth Table

Differential Input

Failsafe Input

Receiver

(+) - (–)

FS1, FS2

Logic Output

>200 mV

X

H

<–200 mV

X

L

O/C

L

L

S/C

L

L

O/C

H

H

S/C

H

H

A

B

C

D

E

F

G

H

A–

A+

B–

B+

C–

C+

D–

D+

E–

E+

F–

F+

G–

G+

H–

H+

FS1

FS2

ADM5180