MAX3224E Maxim, MAX3224E Datasheet

MAX3224E

Manufacturer Part Number

MAX3224E

Description

15kV ESD-Protected / 1A / 1Mbps / 3.0V to 5.5V / RS-232 Transceivers with AutoShutdown Plus

Manufacturer

Maxim

Datasheet

1.MAX3224E.pdf (20 pages)

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Download datasheet (244Kb)

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 SSOP pack-

age.

AutoShutdown Plus and MegaBaud are trademarks of

Maxim Integrated Products.

†

4,797,899; 4,809,152; 4,897,774; 4,999,761; 5,649,210; and other

patents pending.

________________________Applications

19-1339; Rev 0; 1/98

________________General Description

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

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

Covered by U.S. Patent numbers 4,636,930; 4,679,134; 4,777,577;

RS-232 Transceivers with AutoShutdown Plus

Notebook, Subnotebook, and Palmtop Computers

Cellular Phones

Battery-Powered Equipment

Hand-Held Equipment

Peripherals

Printers

________________________________________________________________ Maxim Integrated Products

____________________________Features

_______________Ordering Information

Ordering Information continued at end of data sheet.

_____________________ Selector Guide

MAX3224E

MAX3225E

MAX3226E

MAX3227E

MAX3244E

MAX3245E

MAX3224ECPP

MAX3224ECAP

MAX3224EEPP

MAX3224EEAP

MAX3225ECPP

MAX3225ECAP

MAX3225EEPP

MAX3225EEAP

ESD Protection for RS-232 I/O Pins:

Latchup Free

1µA Supply Current

AutoShutdown Plus—EDN Innovation of the Year

Guaranteed Data Rate:

Guaranteed Slew Rate:

Meets EIA/TIA-232 Specifications Down to 3.0V

Guaranteed Mouse Driveability

(MAX3244E/3245E)

Ready-to-Transmit Logic-Level Output

PART

250kbps (MAX3224E/3226E/3244E)

1Mbps (MAX3225E/3227E/3245E)

6V/µs (MAX3224E/3226E/3244E)

24V/µs (MAX3225E/3227E/3245E)

PART

±15kV—Human Body Model

±8kV—IEC1000-4-2, Contact Discharge

±15kV—IEC1000-4-2, Air-Gap Discharge

RECEIVERS

DRIVERS/

NO. OF

2/2

1/1

3/5

-40°C to +85°C

TEMP. RANGE

0°C to +70°C

GUARANTEED

DATA RATE

(bps)

250k

OUTPUT

READY

PIN-PACKAGE

20 Plastic DIP

20 SSOP

20 Plastic DIP

20 SSOP

20 Plastic DIP

20 SSOP

20 Plastic DIP

20 SSOP

—

SHUTDOWN

AUTO-

PLUS

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