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16

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9

READY

C1+

V+

C1−

C2+

C2−

V−

RIN

FORCEOFF

GND

DOUT

FORCEON

DIN

INVALID

ROUT

DESCRIPTION/ORDERING INFORMATION

MAX3227

3-V TO 5.5-V SINGLE-CHANNEL RS-232 LINE DRIVER/RECEIVER

WITH

±15-kV ESD PROTECTION

SLLS673A – AUGUST 2005 – REVISED FEBRUARY 2006

•

Battery-Powered, Hand-Held, and Portable

•

Meets or Exceeds the Requirements of

Equipment

TIA/EIA-232-F and ITU v.28 Standards

•

PDAs and Palmtop PCs

•

•

Notebooks, Sub-Notebooks, and Laptops

•

Operates at Least 1 Mbit/s

•

Digital Cameras

•

Low Standby Current . . . 1

µA Typ

•

Mobile Phones and Wireless Devices

•

External Capacitors . . . 4

× 0.1 µF

•

Accepts 5-V Logic Input With 3.3-V Supply

•

Designed to Be Interchangeable With Maxim™

MAX3227

•

Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

•

ESD Protection for RS-232 I/O Pins

–

±15 kV – Human-Body Model

–

±8 kV – IEC61000-4-2, Contact Discharge

–

±8 kV – IEC61000-4-2, Air-Gap Discharge

•

Auto-Powerdown Plus Feature Automatically

Disables Drivers for Power Savings

•

Packaged in Plastic Shrink Small-Outline

Package

The MAX3227 consists of one line driver, one line receiver, and a dual charge-pump circuit with

±15-kV ESD

protection pin to pin (serial-port connection pins, including GND). The device meets the requirements of

TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the

serial-port connector. The charge pump and four small external capacitors allow operation from a single 3-V to

5.5-V supply. This device operates at data-signaling rates of 1 Mbit/s in normal operating mode and a maximum

of 30-V/

µs driver output slew rate. This device also features a logic-level output (READY) that asserts when the

charge pump is regulating and the device is ready to begin transmitting.

The MAX3227 achieves a 1-

µA supply current using the auto-powerdown plus feature. This device automatically

enters a low-power powerdown mode when the RS-232 cable is disconnected or the drivers of the connected

peripherals are inactive for more than 30 s. They turn on again when they sense a valid transition at any driver or

receiver input. Auto-powerdown saves power without changes to the existing BIOS or operating system.

The MAX3227C is characterized for operation from 0

°C to 70°C. The MAX3227I is characterized for operation

from –40

°C to 85°C.

AVAILABLE OPTIONS

PACKAGED DEVICE

SHRINK SMALL OUTLINE

0

°C to 70°C

MAX3227CDB

–40

°C to 85°C

MAX3227IDB

(1)

The DB package is available taped and reeled. Add the suffix R to

device type (e.g., MAX3227CDBR).

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2006, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.