MAX14780E Maxim Integrated Products, MAX14780E Datasheet

MAX14780E

Manufacturer Part Number

MAX14780E

Description

RS-485/RS-422 Transceiver

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX14780E.pdf (14 pages)

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19-5652; Rev 0; 12/10

The MAX14780E +5.0V, ±30kV ESD-protected, RS-485/

RS-422 transceiver features one driver and one receiver.

The device includes fail-safe circuitry, guaranteeing a

logic-high receiver output when receiver inputs are open

or shorted. The receiver outputs a logic-high if all trans-

mitters on a terminated bus are disabled (high imped-

ance). The MAX14780E includes a hot-swap capability

to eliminate false transitions on the bus during power-up

or hot insertion.

The MAX14780E features reduced slew-rate drivers that

minimize EMI and reduce reflections caused by improp-

erly terminated cables, allowing error-free data transmis-

sion up to 500kbps.

The MAX14780E is ideal for half-duplex communications

and it draws 1.2mA of supply current when unloaded

or when fully loaded with the drivers disabled. The

MAX14780E has a 1/8-unit load receiver input imped-

ance, allowing up to 256 transceivers on the bus.

The MAX14780E is available in an 8-pin SO package.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Utility Meters

Lighting Systems

Industrial Control

Telecom

Security Systems

Instrumentation

Profibus

_______________________________________________________________ Maxim Integrated Products 1

+5.0V, ±30kV ESD-Protected, Fail-Safe,

General Description

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

Applications

TYPICAL HALF-DUPLEX OPERATING CIRCUIT

GND

0.1µF

S +5.0V Operation

S Extended ESD Protection for RS-485/RS-422 I/O

S True Fail-Safe Receiver While Maintaining EIA/

S Hot-Swap Input Structures on DE and RE

S Enhanced Slew-Rate Limiting Facilitates Error-

S Low-Current Shutdown Mode

S Allow Up to 256 Transceivers on the Bus

S Available in Industry-Standard 8-Pin SO Package

+Denotes a lead(Pb)-free/RoHS-compliant package.

MAX14780EESA+

MAX14780E

Pins ±30kV Human Body Model

TIA-485 Compatibility

Free Data Transmission

PART

Typical Operating Circuits

Ordering Information

-40NC to +85NC

TEMP RANGE

www.DataSheet4U.com

PIN-PACKAGE

Features

8 SO

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