_______________General Description

The MAX1482 and MAX1483 are low-power trans-

ceivers for RS-485 and RS-422 communication. Both

feature slew-rate-limited drivers that minimize EMI and

reduce reflections caused by improperly terminated

cables. Data rates are guaranteed up to 250kbps.

The MAX1482/MAX1483 draw only 20µA of supply cur-

rent. Additionally, they have a low-current shutdown

mode that consumes only 0.1µA. Both parts operate

from a single +5V supply.

Drivers are short-circuit current limited and are protect-

ed against excessive power dissipation by thermal

shutdown circuitry that places the driver outputs into a

high-impedance state. The receiver input has a fail-safe

feature that guarantees a logic-high output if the input

is open circuit.

The MAX1482 is full duplex and the MAX1483 is half

that guarantees up to 256 transceivers on the bus.

________________________Applications

Low-Power RS-485/RS-422 Networks

Transceivers for EMI-Sensitive Applications

Industrial-Control Local Area Networks

Large 256-Node LANs

____________________________Features

o Low 20µA Operating Current

o Slew-Rate Limited for Reduced EMI and

Reduced Reflections

o 0.1µA Low-Current Shutdown Mode

o Designed for RS-485 and RS-422 Applications

o Operate from a Single +5V Supply

o -7V to +12V Common-Mode Input Voltage Range

o Allows up to 256 Transceivers on the Bus—

o Current Limiting and Thermal Shutdown for

Driver Overload Protection

______________Ordering Information

RS-485 Transceivers

________________________________________________________________

Maxim Integrated Products

1

TOP VIEW

1

2

3

4

8

7

6

5

B

A

GND

DI

DE

RE

RO

DIP/SO

R

D

1

2

3

4

8

7

6

5

A

GND

DE

RE

B

RO

µMAX

DI

MAX1483

_________________Pin Configurations

MAX1483

NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM

DIAGRAMS REFER TO PINS A AND B WHEN DE IS HIGH.

TYPICAL OPERATING CIRCUIT SHOWN WITH DIP/SO PACKAGE.

1

2

3

4

8

5

+5V

GND

DI

DE

RE

RO

R

D

Rt

Rt

7

6

D

R

DE

RE

DI

RO

A

B

B

A

_________Typical Operating Circuits

Call toll free 1-800-998-8800 for free samples or literature.

19-0367; Rev 0; 2/95

PART

MAX1482CPD

MAX1482CSD

MAX1482EPD

-40°C to +85°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

14 Plastic DIP

14 SO

14 Plastic DIP

MAX1482ESD

-40°C to +85°C

14 SO

MAX1483CPA

0°C to +70°C

8 Plastic DIP

MAX1483CSA

0°C to +70°C

8 SO

MAX1483CUA

0°C to +70°C

8 µMAX

MAX1483EPA

-40°C to +85°C

8 Plastic DIP

MAX1483ESA

-40°C to +85°C

8 SO

MAX1482 appears at end of data sheet.

MAX1482 appears at end of data sheet.