General Description

The MAX3293/MAX3294/MAX3295 low-power, high-

speed transmitters for RS-485/RS-422 communication

operate from a single +3.3V power supply. These

devices contain one differential transmitter. The

MAX3295 transmitter operates at data rates up to

20Mbps, with an output skew of less than 5ns, and a

guaranteed driver propagation delay below 25ns. The

MAX3293 (250kbps) and MAX3294 (2.5Mbps) are

slew-rate limited to minimize EMI and reduce reflections

caused by improperly terminated cables.

The MAX3293/MAX3294/MAX3295 output level is guar-

anteed at +1.5V with a standard 54

Ω load, compliant

with RS-485 specifications. The transmitter draws 5mA

of supply current when unloaded, and 1µA in low-

power shutdown mode (DE = GND).

Hot-swap circuitry eliminates false transitions on the data

cable during circuit initialization or connection to a live

backplane, and short-circuit current limiting and thermal-

shutdown circuitry protect the driver against excessive

power dissipation.

The MAX3293/MAX3294/MAX3295 are offered in a

6-pin SOT23 package, and are specified over the

automotive temperature range.

Applications

RS-485/RS-422 Communications

Clock Distribution

Telecom Equipment

Automotive

Security Equipment

Point-of-Sale Equipment

Industrial Control

Features

♦ Space-Saving 6-Pin SOT23 Package

♦ 250kbps/2.5Mbps/20Mbps Data Rates Available

♦ Operate from a Single +3.3V Supply

♦ ESD Protection

±9kV—Human Body Model

♦ Slew-Rate Limited for Errorless Data

Transmission (MAX3293/MAX3294)

♦ 1µA Low-Current Shutdown Mode

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

♦ Current Limiting and Thermal Shutdown for

Driver-Overload Protection

♦ Hot-Swap Inputs for Telecom Applications

♦ Automotive Temperature Range (-40°C to +125°C)

20Mbps, +3.3V, SOT23 RS-485/

RS-422 Transmitters

________________________________________________________________

Maxim Integrated Products

1

Selector Guide

Ordering Information

19-2770; Rev 3; 3/11

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.

PART

TEMP RANGE

PIN-PACKAGE

MAX3293AUT+T

-40°C to +125°C

6 SOT23-6

MAX3294AUT+T

-40°C to +125°C

6 SOT23-6

MAX3295AUT+T

-40°C to +125°C

6 SOT23-6

PART

MAXIMUM

DATA RATE

(Mbps)

SLEW-

RATE

LIMITED

TOP

MARK

MAX3293AUT+T

0.25

Yes

ABNI or

ABVH

MAX3294AUT+T

2.5

Yes

ABNJ or

ABVI

MAX3295AUT+T

20

No

ABNK or

ABVJ

Typical Operating Circuit

MAX3293

MAX3294

MAX3295

D

DI

DE

MAX3280E

MAX3281E

MAX3283E

MAX3284E

R

RO

120

Ω

Z

Y

+

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

T = Tape and reel.

Pin Configuration appears at end of data sheet.