19-1298; Rev 10; 1/06
1ꢀ5k EꢁD-ꢂrotected, Down to 10nA, 3.0k to ꢀ.ꢀk,
Up to 1Mbps, True Rꢁ-232 Transceivers
General Description
Next-Generation Device Features
♦ For Space-Constrained Applications
MAX3228E/MAX3229E: 15kV ESD-Protected,
+2.5V to +5.5V, RS-232 Transceivers in UCSP
The MAX3222E/MAX3232E/MAX3237E/MAX3241E/
MAX3246E +3.0V-powered EIA/TIA-232 and V.28/V.24
communications interface devices feature low power con-
sumption, high data-rate capabilities, and enhanced
electrostatic-discharge (ESD) protection. The enhanced
ESD structure protects all transmitter outputs and
receiver inputs to ±1ꢀ5V using IEꢁ 1000-4-2 Air-ꢂap
Discharge, ±85V using IEꢁ 1000-4-2 ꢁontact Discharge
(±±5V for MAX3246E), and ±1ꢀ5V using the ꢃuman ꢄodꢅ
Model. The logic and receiver I/O pins of the MAX3237E
are protected to the above standards, while the transmit-
ter output pins are protected to ±1ꢀ5V using the ꢃuman
ꢄodꢅ Model.
♦ 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
_______________Ordering Information
PIN-
PACKAGE
PKG
CODE
A proprietarꢅ low-dropout transmitter output stage delivers
true RS-232 performance from a +3.0V to +ꢀ.ꢀV power
supplꢅ, using an internal dual charge pump. The charge
pump requires onlꢅ four small 0.1µF capacitors for opera-
tion from a +3.3V supplꢅ. Each device guarantees opera-
tion at data rates of 2ꢀ05bps while maintaining RS-232
output levels. The MAX3237E guarantees operation at
2ꢀ05bps in the normal operating mode and 1Mbps in the
Megaꢄaud™ operating mode, while maintaining RS-232-
compliant output levels.
The MAX3222E/MAX3232E have two receivers and two
transmitters. The MAX3222E features a 1µA shutdown
mode that reduces power consumption in batterꢅ-pow-
ered portable sꢅstems. The MAX3222E receivers remain
active in shutdown mode, allowing monitoring of external
devices while consuming onlꢅ 1µA of supplꢅ current. The
MAX3222E and MAX3232E are pin, pac5age, and func-
tionallꢅ compatible with the industrꢅ-standard MAX242
and MAX232, respectivelꢅ.
The MAX3241E/MAX3246E are complete serial ports
(three drivers/five receivers) designed for noteboo5 and
subnoteboo5 computers. The MAX3237E (five drivers/
three receivers) is ideal for peripheral applications that
require fast data transfer. These devices feature a shut-
down mode in which all receivers remain active, while
consuming onlꢅ 1µA (MAX3241E/MAX3246E) or 10nA
(MAX3237E).
PART
TEMP RANGE
20 Thin QFN-
MAX3222EꢁTP
0°ꢁ to +70°ꢁ EP** (ꢀmm x
ꢀmm)
T20ꢀꢀ-ꢀ
MAX3222EꢁUP
MAX3222EꢁAP
MAX3222EꢁWN
MAX3222EꢁPN
MAX3222Eꢁ/D
0°ꢁ to +70°ꢁ 20 TSSOP
—
—
—
—
—
0°ꢁ to +70°ꢁ 20 SSOP
0°ꢁ to +70°ꢁ 18 Wide SO
0°ꢁ to +70°ꢁ 18 Plastic DIP
0°ꢁ to +70°ꢁ Dice*
20 Thin QFN-
EP** (ꢀmm x
ꢀmm)
MAX3222EETP
-40°ꢁ to +8ꢀ°ꢁ
T20ꢀꢀ-ꢀ
MAX3222EEUP
MAX3222EEAP
-40°ꢁ to +8ꢀ°ꢁ 20 TSSOP
-40°ꢁ to +8ꢀ°ꢁ 20 SSOP
—
—
—
—
—
—
—
MAX3222EEWN -40°ꢁ to +8ꢀ°ꢁ 18 Wide SO
MAX3222EEPN
MAX3232EꢁAE
MAX3232EꢁWE
MAX3232EꢁPE
-40°ꢁ to +8ꢀ°ꢁ 18 Plastic DIP
0°ꢁ to +70°ꢁ 16 SSOP
0°ꢁ to +70°ꢁ 16 Wide SO
0°ꢁ to +70°ꢁ 16 Plastic DIP
*Dice are tested at T = +25°C, DC parameters only.
A
**EP = Exposed paddle.
The MAX3222E, MAX3232E, and MAX3241E are avail-
able in space-saving SO, SSOP, TQFN and TSSOP pac5-
ages. The MAX3237E is offered in an SSOP pac5age.
The MAX3246E is offered in the ultra-small 6 x 6 UꢁSP™
pac5age.
Ordering Information continued at end of data sheet.
Pin Configurations, Selector Guide, and Typical Operating
Circuits appear at end of data sheet.
Applications
ꢄatterꢅ-Powered Equipment Printers
MegaBaud and UCSP are trademarks of Maxim Integrated
Products, Inc.
ꢁell Phones
ꢁell-Phone Data ꢁables
Smart Phones
xDSL Modems
†
Covered by U.S. Patent numbers 4,636,930; 4,679,134;
4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761; and
other patents pending.
Noteboo5, Subnoteboo5,
and Palmtop ꢁomputers
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
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