MAX3221E/
MAX3223E/MAX3243E
15kV ESD-Protected, 1A, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
General Description Next Generation Device Features
The MAX3221E/MAX3223E/MAX3243E are 3V-powered For Space-Constrained Applications:
EIA/TIA-232 and V.28/V.24 communications interfaces MAX3228E/MAX3229E: 15kV ESD-Protected, +2.5V
with automatic shutdown/wakeup features, high data- to +5.5V RS-232 Transceivers in UCSP
rate capabilities, and enhanced electrostatic discharge
MAX3222E/MAX3232E/MAX3237E/MAX3241E/
(ESD) protection. All transmitter outputs and receiver
MAX3246E: 15kV ESD-Protected Down to 10nA,
inputs are protected to 15kV using IEC 1000-4-2 Air-
+3.0V to +5.5V, Up to 1Mbps, True RS-232
Gap Discharge, to 8kV using IEC 1000-4-2 Contact
Transceivers (MAX3246E Available in a UCSP
Discharge, and to 15kV using the Human Body Model.
Package)
The MAX3221E/MAX3223E/MAX3243E achieve a
For Data Cable Applications:
1A supply current with Maxims revolutionary
MAX3380E/MAX3381E: +2.35V to +5.5V, 1A,
AutoShutdown feature. They save power without
2Tx/2Rx RS-232 Transceivers with 15kV ESD-
changes to the existing BIOS or operating system by enter-
Protected I/O and Logic Pins
ing low-power shutdown mode when the RS-232 cable is
disconnected, or when the transmitters of the connected
Ordering Information
peripherals are off.
The transceivers have a proprietary low-dropout trans-
PART TEMP RANGE PIN-PACKAGE
mitter output stage, delivering true RS-232 performance
MAX3221ECTE+ 0C to +70C 16 TQFN-EP*
from a +3.0V to +5.5V supply with a dual charge pump.
MAX3221ECUE+ 0C to +70C 16 TSSOP
The charge pump requires only four small 0.1F capaci-
MAX3221ECAE+ 0C to +70C 16 SSOP
tors for operation from a +3.3V supply. Each device is
guaranteed to run at data rates of 250kbps while main-
MAX3221EEAE+ -40C to +85C 16 SSOP
taining RS-232 output levels.
MAX3221EETE+ -40C to +85C 16 TQFN-EP*
The MAX3221E contains just one driver and one receiver,
MAX3221EEUE+ -40C to +85C 16 TSSOP
making it the smallest single-supply RS-232 transceiver.
MAX3223ECPP+ 0C to +70C 20 PDIP
The MAX3223E has two drivers and two receivers. The
MAX3223ECAP+ 0C to +70C 20 SSOP
MAX3243E is a complete 3-driver/5-receiver serial port
MAX3223ECUP+ 0C to +70C 20 TSSOP
ideal for notebook or subnotebook computers. It also
includes two noninverting receiver outputs that are always
MAX3223ECTP+ 0C to +70C 20 TQFN-EP*
active, allowing external devices to be monitored without
MAX3223EEPP+ -40C to +85C 20 PDIP
Functional Diagrams
forward biasing the protection diodes in circuitry that may
MAX3223EEAP+ -40C to +85C 20 SSOP
be powered down.
MAX3223EEUP+ -40C to +85C 20 TSSOP
The MAX3221E, MAX3223E, and MAX3243E are avail-
MAX3223EETP+ -40C to +85C 20 TQFN-EP*
able in space-saving TQFN, SSOP, and TSSOP pack-
ages. MAX3223EEUP/V+ -40C to +85C 20 TSSOP
*Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Applications
/V denotes an automotive qualified part.
Notebook, Subnotebook, and Palmtop Computers
Ordering Information continued at end of data sheet.
Cellular Phones
Battery-Powered Equipment
Selector Guide
Handheld Equipment
NO. OF VCC
Peripherals
PART DRIVERS/ RANGE AutoShutdown
Printers
RECEIVERS (V)
MAX3221E 1/1 +3.0 to +5.5
Pin Configurations appear at end of data sheet.
MAX3223E 2/2 +3.0 to +5.5
Typical Operating Circuits appear at end of data sheet.
Pin Configurations appear at end of data sheet. MAX3243E 3/5 +3.0 to +5.5
Functional Diagrams continued at end of data sheet.
AutoShutdown and UCSP are trademarks of Maxim Integrated Products, Inc.
UCSP is a trademark of Maxim Integrated Products, Inc.
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
19-1283; Rev 7; 8/11
at 1-888-629-4642, or visit Maxims website at www.maxim integrated.com.
AVAILABLEMAX3221E/MAX3223E/MAX3243E
15kV ESD-Protected, 1A, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
ABSOLUTE MAXIMUM RATINGS
V to GND..............................................................-0.3V to +6V 16-Pin TQFN (derate 20.8mW/C above +70C) ......1666.7mW
CC
V+ to GND (Note 1)..................................................-0.3V to +7V 20-Pin Plastic DIP (derate 11.11mW/C above +70C)....889mW
V- to GND (Note 1) ...................................................+0.3V to -7V 20-Pin SSOP (derate 8.00mW/C above +70C) ...........640mW
V+ + |V-| (Note 1) .................................................................+13V 20-Pin TSSOP (derate 10.9mW/C above +70C) .........879mW
Input Voltages 20-Pin TQFN (derate 21.3mW/C above +70C) ......1702.1mW
28-Pin SSOP (derate 9.52mW/C above +70C)............762mW
T_IN, EN, FORCEON, FORCEOFF to GND ............-0.3V to +6V
R_IN to GND ......................................................................25V 28-Pin TSSOP (derate 12.8mW/C above +70C) .......1026mW
Output Voltages 32-Pin TQFN (derate 37mW/C above +70C) ............2963mW
T_OUT to GND................................................................13.2V Operating Temperature Ranges
R_OUT, R2OUTB, INVALID to GND.........-0.3V to (V + 0.3V) MAX32_ _EC_ _ ....................................................0C to +70C
CC
Short-Circuit Duration MAX32_ _EE_ _..................................................-40C to +85C
T_OUT to GND .........................................................Continuous Storage Temperature Range .............................-65C to +160C
Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C
A
16-Pin SSOP (derate 7.14mW/C above +70C) ...........571mW Soldering Temperature (reflow) .......................................+260C
16-Pin TSSOP (derate 9.4mW/C above +70C) ........754.7mW
Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V = +3.0V to +5.5V, C1C4 = 0.1F (Note 2), T = T to T , unless otherwise noted. Typical values are at T = +25C.)
CC A MIN MAX A
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC CHARACTERISTICS (V = 3.3V or 5.0V, T = +25C)
CC A
FORCEON = GND,
Supply Current, AutoShutdown 1.0 10 A
FORCEOFF = V all R_IN open
CC,
Supply Current, Shutdown FORCEOFF = GND, all R_IN = GND 1.0 10 A
Supply Current, FORCEON = FORCEOFF = V ,
CC
0.3 1 mA
AutoShutdown Disabled no load
LOGIC INPUTS
Input Logic Threshold Low 0.8 V
T_IN, EN, FORCEON, FORCEOFF
V = 3.3V 2.0
T_IN, EN, FORCEON, CC
Input Logic Threshold High V
FORCEOFF
V = 5.0V 2.4
CC
Transmitter Input Hysteresis 0.5 V
Input Leakage Current T_IN, EN, FORCEON, FORCEOFF 0.01 1 A
RECEIVER OUTPUTS
Output Leakage Current R_OUT receivers disabled 0.05 10 A
Output Voltage Low I = 1.6mA 0.4 V
OUT
Output Voltage High I = -1.0mA V - 0.6 V - 0.1 V
OUT CC CC
AutoShutdown (FORCEON = GND, FORCEOFF = V )
CC
Positive threshold 2.7
Receiver Input Threshold to
Figure 5a V
INVALID Output High
Negative threshold -2.7
Receiver Input Threshold to
Figure 5a -0.3 0.3 V
INVALID Output Low
INVALID Output Voltage Low I = 1.6mA 0.4 V
OUT
INVALID Output Voltage High I = -1.0mA V - 0.6 V
OUT CC
2 Maxim Integrated