MAX3070E Maxim, MAX3070E Datasheet

MAX3070E

Manufacturer Part Number

MAX3070E

Description

+3.3V / 15kV ESD-Protected / Fail-Safe / Hot-Swap / RS-485/RS-422 Transceivers

Manufacturer

Maxim

Datasheet

1.MAX3070E.pdf (25 pages)

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Download datasheet (503Kb)

The MAX3070E–MAX3079E 3.3V, ±15kV ESD-protected,

RS-485/RS-422 transceivers feature one driver and one

receiver. These devices include fail-safe circuitry, guar-

anteeing a logic-high receiver output when receiver

inputs are open or shorted. The receiver outputs a logic

high if all transmitters on a terminated bus are disabled

(high impedance). The MAX3070E–MAX3079E include a

hot-swap capability to eliminate false transitions on the

bus during power-up or hot insertion.

The MAX3070E/MAX3071E/MAX3072E feature reduced

slew-rate drivers that minimize EMI and reduce reflec-

tions caused by improperly terminated cables, allowing

error-free data transmission up to 250kbps. The

MAX3073E/MAX3074E/MAX3075E also feature slew-

rate-limited drivers but allow transmit speeds up to

500kbps. The MAX3076E/MAX3077E/MAX3078E driver

slew rates are not limited, making transmit speeds up to

16Mbps possible. The MAX3079E slew rate is pin

selectable for 250kbps, 500kbps, and 16Mbps.

The MAX3072E/MAX3075E/MAX3078E are intended for

half-duplex communications, and the MAX3070E/

MAX3071E/MAX3073E/MAX3074E/MAX3076E/MAX307

7E are intended for full-duplex communications. The

MAX3079E is selectable for half-duplex or full-duplex

operation. It also features independently programmable

receiver and transmitter output phase through

separate pins.

The MAX3070E–MAX3079E transceivers draw 800µA

of supply current when unloaded or when fully loaded

with the drivers disabled. All devices have a 1/8-unit

load receiver input impedance, allowing up to 256

transceivers on the bus.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

19-2668; Rev 1; 1/03

Lighting Systems

Industrial Control

Telecom

Security Systems

Instrumentation

________________________________________________________________ Maxim Integrated Products

Hot-Swap, RS-485/RS-422 Transceivers

+3.3V, ±15kV ESD-Protected, Fail-Safe,

General Description

Applications

o 3.3V Operation

o Electrostatic Discharge (ESD) Protection for

o True Fail-Safe Receiver While Maintaining

o Hot-Swap Input Structure on DE and RE

o Enhanced Slew-Rate Limiting Facilitates Error-

o Low-Current Shutdown Mode (Except

o Pin-Selectable Full-/Half-Duplex Operation

o Phase Controls to Correct for Twisted-Pair

o Allow Up to 256 Transceivers on the Bus

o Available in Industry-Standard 8-Pin SO Package

Ordering Information continued at end of data sheet.

Selector Guide, Pin Configurations, and Typical Operating

Circuits appear at end of data sheet.

MAX3070EEPD

MAX3070EESD

MAX3070EAPD

MAX3070EASD

MAX3071EEPA

MAX3071EESA

MAX3071EAPA

MAX3071EASA

RS-485 I/O Pins

EIA/TIA-485 Compatibility

Free Data Transmission

(MAX3070E–MAX3075E/MAX3079E)

MAX3071E/MAX3074E/MAX3077E)

(MAX3079E)

Reversal (MAX3079E)

±15kV Human Body Model

PART

-40°C to +85°C

-40°C to +125°C

-40°C to +85°C

-40°C to +125°C

TEMP RANGE

Ordering Information

PIN-PACKAGE

14 Plastic DIP

14 SO

14 Plastic DIP

14 SO

8 Plastic DIP

8 SO

8 Plastic DIP

8 SO

Features

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