AVAILABLE

Functional Diagrams

Pin Configurations appear at end of data sheet.

Functional Diagrams continued at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

For pricing, delivery, and ordering information, please contact Maxim Direct

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

________________General Description

The MAX3224E/MAX3225E/MAX3226E/MAX3227E/

MAX3244E/MAX3245E are 3V-powered EIA/TIA-232

and V.28/V.24 communications interfaces with automat-

ic shutdown/wakeup features, high data-rate capabili-

ties, and enhanced electrostatic discharge (ESD)

protection. All transmitter outputs and receiver inputs

are protected to ±15kV using IEC 1000-4-2 Air-Gap

Discharge, ±8kV using IEC 1000-4-2 Contact Discharge,

and ±15kV using the Human Body Model.

All devices achieve a 1µA supply current using Maxim’s

revolutionary AutoShutdown Plus™ feature. These

devices automatically enter a low-power shutdown

mode when the RS-232 cable is disconnected or the

transmitters of the connected peripherals are inactive,

and the UART driving the transmitter inputs is inactive

for more than 30 seconds. They turn on again when

they sense a valid transition at any transmitter or receiv-

er input. AutoShutdown Plus saves power without

changes to the existing BIOS or operating system.

The MAX3225E/MAX3227E/MAX3245E also feature

MegaBaud™ operation, guaranteeing 1Mbps for high-

speed applications such as communicating with ISDN

modems. The MAX3224E/MAX3226E/MAX3244E guar-

antee 250kbps operation. The transceivers have a pro-

prietary low-dropout transmitter output stage enabling

true RS-232 performance from a +3.0V to +5.5V supply

with a dual charge pump. The charge pump requires

only four small 0.1µF capacitors for operation from a

3.3V supply. The MAX3224E–MAX3227E feature a logic-

level output (READY) that asserts when the charge

pump is regulating and the device is ready to begin

transmitting.

All devices are available in a space-saving TQFN,

SSOP, and TSSOP (MAX3224E/MAX3225E/MAX3244E/

MAX3245E) packages.

________________________Applications

Notebook, Subnotebook, and Palmtop Computers

Cellular Phones

Battery-Powered Equipment

Hand-Held Equipment

Peripherals

Printers

__Next Generation Device Features

♦♦ For Space-Constrained Applications:

MAX3228E/MAX3229E: ±15kV ESD-Protected,

+2.5V to +5.5V, RS-232 Transceivers in UCSP™

MAX3222E/MAX3232E/MAX3241E/MAX3246E:

±15kV ESD-Protected, Down to 10nA, +3.0V to

+5.5V, Up to 1Mbps, True RS-232 Transceivers

(MAX3246E Available in UCSP)

♦♦ For Low-Voltage or Data Cable Applications:

MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA,

2Tx/2Rx RS-232 Transceivers with ±15kV

ESD-Protected I/O and Logic Pins

±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V,

RS-232 Transceivers with AutoShutdown Plus

19-1339; Rev 10; 3/11

PART

MAX3224E

MAX3225E

MAX3226E

1/1

2/2

2/2

NO. OF

DRIVERS/

RECEIVERS

READY

OUTPUT

✔

✔

✔

Auto-

Shutdown

Plus

✔

✔

✔

250k

1M

250k

GUARANTEED

DATA RATE

(bps)

MAX3227E

MAX3244E

MAX3245E

3/5

3/5

1/1

✔

—

—

✔

✔

✔

1M

250k

1M

Ordering Information continued at end of data sheet.

+

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

*

EP = Exposed pad.

AutoShutdown Plus, MegaBaud, and UCSP are trademarks of

Maxim Integrated Products, Inc.

_____________________ Selector Guide

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX3224ECTP+

0

°C to +70°C

20 TQFN-EP*

MAX3224ECUP+

0

°C to +70°C

20 TSSOP

MAX3224ECAP+

0

°C to +70°C

20 SSOP

MAX3224ECPP+

0

°C to +70°C

20 Plastic DIP

MAX3224EETP+

-40

°C to +85°C

20 TQFN-EP*

MAX3224EEUP+

-40

°C to +85°C

20 TSSOP

MAX3224EEAP+

-40

°C to +85°C

20 SSOP

MAX3224EEPP+

-40

°C to +85°C

20 Plastic DIP

MAX3224EAAP+

-40

°C to +125°C

20 SSOP

MAX3224E/MAX3225E/

MAX3226E/MAX3227E/

MAX3244E/MAX3245E