MAX3221E_14 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – ±15kV ESD-Protected, 1μA, 3.0V to 5.5V, 250kbps,RS-232 Transceivers with AutoShutdown

MAX3221E/
AVAILABLE
MAX3223E/MAX3243E
±15kV ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
General Description Next Generation Device Features
The MAX3221E/MAX3223E/MAX3243E are 3V-powered
EIA/TIA-232 and V.28/V.24 communications interfaces
with automatic shutdown/wakeup features, high data-
rate capabilities, and enhanced electrostatic discharge
(ESD) protection. All transmitter outputs and receiver
inputs are protected to ±15kV using IEC 1000-4-2 Air-
Gap Discharge, to ±8kV using IEC 1000-4-2 Contact
Discharge, and to ±15kV using the Human Body Model.
The MAX3221E/MAX3223E/MAX3243E achieve a
1µA supply current with Maxim’s revolutionary
AutoShutdown™ feature. They save power without
changes to the existing BIOS or operating system by enter-
ing low-power shutdown mode when the RS-232 cable is
disconnected, or when the transmitters of the connected
peripherals are off.
The transceivers have a proprietary low-dropout trans-
mitter output stage, delivering 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 capaci-
tors for operation from a +3.3V supply. Each device is
guaranteed to run at data rates of 250kbps while main-
taining RS-232 output levels.
The MAX3221E contains just one driver and one receiver,
making it the smallest single-supply RS-232 transceiver.
The MAX3223E has two drivers and two receivers. The
MAX3243E is a complete 3-driver/5-receiver serial port
ideal for notebook or subnotebook computers. It also
includes two noninverting receiver outputs that are always
active, allowing
forward biasing
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be powered down.
The MAX3221E, MAX3223E, and MAX3243E are avail-
able in space-saving TQFN, SSOP, and TSSOP pack-
ages.
Applications
Notebook, Subnotebook, and Palmtop Computers
Cellular Phones
Battery-Powered Equipment
Handheld Equipment
Peripherals
Printers
o For Space-Constrained Applications:
MAX3228E/MAX3229E: ±15kV ESD-Protected, +2.5V
to +5.5V RS-232 Transceivers in UCSP™
MAX3222E/MAX3232E/MAX3237E/MAX3241E/
MAX3246E: ±15kV ESD-Protected Down to 10nA,
+3.0V to +5.5V, Up to 1Mbps, True RS-232
Transceivers (MAX3246E Available in a UCSP
Package)
o For 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
PART
TEMP RANGE PIN-PACKAGE
MAX3221ECTE+
0°C to +70°C
16 TQFN-EP*
MAX3221ECUE+
0°C to +70°C
16 TSSOP
MAX3221ECAE+
0°C to +70°C
16 SSOP
MAX3221EEAE+
-40°C to +85°C 16 SSOP
MAX3221EETE+
-40°C to +85°C 16 TQFN-EP*
MAX3221EEUE+
-40°C to +85°C 16 TSSOP
MAX3223ECPP+
0°C to +70°C
20 PDIP
MAX3223ECAP+
0°C to +70°C
20 SSOP
MAX3223ECUP+
0°C to +70°C
20 TSSOP
MAX3223ECTP+
0°C to +70°C
20 TQFN-EP*
MAX3223EEPP+
-40°C to +85°C 20 PDIP
MAX3223EEAP+
-40°C to +85°C 20 SSOP
MAX3223EEUP+
-40°C to +85°C 20 TSSOP
MAX3223EETP+
-40°C to +85°C 20 TQFN-EP*
MAX3223EEUP/V+ -40°C to +85°C 20 TSSOP
*Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Ordering Information continued at end of data sheet.
PART
NO. OF
DRIVERS/
RECEIVERS
Selector Guide
VCC
RANGE
(V)
AutoShutdown
MAX3221E
1/1
+3.0 to +5.5


Pin Configurations appear at end of data sheet.
MAX3223E
2/2
+3.0 to +5.5


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MAX3243E
3/5
+3.0 to +5.5


Functional Diagrams continued at end of data sheet.
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†_{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; 5,649,210; and other patents pending.}
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-1283; Rev 7; 8/11