MAX3224E/MAX3225E/
MAX3226E/MAX3227E/
MAX3244E/MAX3245E
±±15k ꢀEDꢁ-rotected, ±µA, ±Mbps, 3.0k to 1.1k,
REꢁ232 Transceivers with AutoEhutdown -lus
________________General Description
__Next Generation Device Features
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 ±±5kV using IEꢀ ±111-4-2 Air-ꢁap
Discharge, ±8kV using IEꢀ ±111-4-2 ꢀontact Discharge,
and ±±5kV using the ꢂuman ꢃodꢄ Model.
♦ 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
All devices achieve a ±µA supplꢄ current using Maxim’s
revolutionarꢄ AutoShutdown Plus™ feature. These
devices automaticallꢄ 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 31 seconds. Theꢄ turn on again when
theꢄ sense a valid transition at anꢄ transmitter or receiv-
er input. AutoShutdown Plus saves power without
changes to the existing ꢃIOS or operating sꢄstem.
Ordering Information
PART
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 TQFN-EP*
20 TSSOP
MAX3224ECTP+
MAX3224ECUP+
MAX3224ECAP+
MAX3224ECPP+
MAX3224EETP+
MAX3224EEUP+
MAX3224EEAP+
MAX3224EEPP+
MAX3224EAAP+
The MAX3225E/MAX3227E/MAX3245E also feature
Megaꢃaud™ operation, guaranteeing ±Mbps for high-
speed applications such as communicating with ISDN
modems. The MAX3224E/MAX3226E/MAX3244E guar-
antee 251kbps operation. The transceivers have a pro-
prietarꢄ low-dropout transmitter output stage enabling
true RS-232 performance from a +3.1V to +5.5V supplꢄ
with a dual charge pump. The charge pump requires
onlꢄ four small 1.±µF capacitors for operation from a
3.3V supplꢄ. The MAX3224E–MAX3227E feature a logic-
level output (READY) that asserts when the charge
pump is regulating and the device is readꢄ to begin
transmitting.
20 SSOP
20 Plastic DIP
20 TQFN-EP*
20 TSSOP
20 SSOP
20 Plastic DIP
-40°C to +125°C 20 SSOP
+Denotes a lead(Pb)-free/RoꢂS-compliant package.
*EP = Exposed pad.
Ordering Information continued at end of data sheet.
All devices are available in a space-saving TQFN,
SSOP, and TSSOP (MAX3224E/MAX3225E/MAX3244E/
MAX3245E) packages.
_____________________ Eelector Guide
NO. OF
DRIVERS/
RECEIVERS
GUARANTEED
DATA RATE
(bps)
Auto-
Shutdown
Plus
READY
OUTPUT
PART
________________________Applications
Notebook, Subnotebook, and Palmtop ꢀomputers
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
MAX3224E
MAX3225E
MAX3226E
MAX3227E
MAX3244E
MAX3245E
2/2
2/2
±/±
±/±
3/5
3/5
251k
±M
ꢀellular Phones
ꢃatterꢄ-Powered Equipment
ꢂand-ꢂeld Equipment
Peripherals
251k
±M
251k
±M
—
—
Printers
AutoShutdown Plus, Megaꢃaud, and UꢀSP are trademarks of
Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
±9-±339; Rev ±1; 3/±±
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
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