MAX3084 Maxim Integrated Products, MAX3084 Datasheet

MAX3084

Manufacturer Part Number

MAX3084

Description

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX3084.pdf (20 pages)

Specifications of MAX3084

Case

SOP8

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*Pin-compatible with 75180, with additional features implemented using pins 1, 6, 8, and 13.

19-1138; Rev 1; 12/97

The MAX3080–MAX3089 high-speed transceivers for

RS-485/RS-422 communication contain one driver and

one receiver. These devices feature fail-safe circuitry,

which guarantees a logic-high receiver output when the

receiver inputs are open or shorted. This means that

the receiver output will be a logic high if all transmitters

on a terminated bus are disabled (high impedance).

The MAX3080/MAX3081/MAX3082 feature reduced

slew-rate drivers that minimize EMI and reduce reflec-

tions caused by improperly terminated cables, allowing

error-free data transmission up to 115kbps. The

MAX3083/MAX3084/MAX3085 offer higher driver out-

put slew-rate limits, allowing transmit speeds up to

500kbps. The MAX3086/MAX3087/MAX3088’s driver

slew rates are not limited, making transmit speeds up

to 10Mbps possible. The MAX3089’s slew rate is

selectable between 115kbps, 500kbps, and 10Mbps

by driving a selector pin with a single three-state

driver.

These transceivers typically draw 375µA of supply

current when unloaded, or when fully loaded with the

drivers disabled.

All devices have a 1/8-unit-load receiver input imped-

ance that allows up to 256 transceivers on the bus. The

MAX3082/MAX3085/MAX3088 are intended for half-

duplex communications, while the MAX3080/MAX3081/

MAX3083/MAX3084/MAX3086/MAX3087 are intended

for full-duplex communications. The MAX3089 is selec-

table between half-duplex and full-duplex operation. It

also features independently programmable receiver

and transmitter output phase via separate pins.

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

MAX3080

MAX3081

MAX3082

MAX3083

MAX3084

MAX3085

MAX3086

MAX3087

MAX3088

MAX3089

Slew-Rate-Limited RS-485/RS-422 Transceivers

Part

Selectable

Half/Full

Duplex

Half

Full

________________________________________________________________ Maxim Integrated Products

General Description

Selectable

(Mbps)

0.115

Data

Rate

0.5

Selectable

Limited

Slew

Rate

Fail-Safe, High-Speed (10Mbps),

Yes

Shutdown

Power

Low-

Yes

Receiver/

Enable

Ordering Information continued on last page.

Driver

MAX3080CPD

MAX3080CSD

MAX3080EPD

MAX3080ESD

Yes

True Fail-Safe Receiver While Maintaining

EIA/TIA-485 Compatibility

Enhanced Slew-Rate Limiting Facilitates

Error-Free Data Transmission

(MAX3080–MAX3085/MAX3089)

1nA Low-Current Shutdown Mode (except

MAX3081/MAX3084/MAX3087)

Pin-Selectable Full/Half-Duplex Operation

(MAX3089)

Phase Controls to Correct for Twisted-Pair

Reversal (MAX3089)

Allow Up to 256 Transceivers on the Bus

PART

RS-422/RS-485 Communications

Level Translators

Transceivers for EMI-Sensitive Applications

Industrial-Control Local Area Networks

Quiescent

Current

(µA)

375

TEMP. RANGE

-40°C to +85°C

Transceivers

0°C to +70°C

Ordering Information

Bus

256

Selection Table

Count

Applications

14 Plastic DIP

14 SO

14 Plastic DIP

14 SO

PIN-PACKAGE

Features

Industry-

Standard

Pinout

75180*

75180

75179

75176

75180

75179

75176

75180

75179

75176

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