MAX3223EEAP-T [ROCHESTER]
Line Transceiver, 2 Func, 2 Driver, 2 Rcvr, BICMOS, PDSO20, SSOP-20;
| 型号： | MAX3223EEAP-T |
| 厂家： | 
Rochester Electronics |
| 描述： | Line Transceiver, 2 Func, 2 Driver, 2 Rcvr, BICMOS, PDSO20, SSOP-20 驱动 信息通信管理 光电二极管 接口集成电路 驱动器 |
| 文件： | 总19页 (文件大小：1405K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX3221E/
MAX3223E/MAX3243E
±±15k ꢀEDꢁ-rotected, ±µA, 3.0k to 1.1k, 2105bps,
REꢁ232 Transceivers with AutoEhutdown
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 1ꢀkV using IEꢁ 1ꢂꢂꢂ-4-2 Air-
Gap Discharge, to 8kV using IEꢁ 1ꢂꢂꢂ-4-2 ꢁontact
Discharge, and to 1ꢀkV using the ꢃuman ꢄodꢅ Model.
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)
The MAX3221E/MAX3223E/MAX3243E achieve a
1µA supplꢅ current with Maxim’s revolutionarꢅ
AutoShutdown™ feature. Theꢅ save power without
changes to the existing ꢄIOS or operating sꢅstem bꢅ enter-
ing low-power shutdown mode when the RS-232 cable is
disconnected, or when the transmitters of the connected
peripherals are off.
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
The transceivers have a proprietarꢅ low-dropout trans-
mitter output stage, delivering true RS-232 performance
from a +3.ꢂV to +ꢀ.ꢀV supplꢅ with a dual charge pump.
The charge pump requires onlꢅ four small ꢂ.1µF capaci-
tors for operation from a +3.3V supplꢅ. Each device is
guaranteed to run at data rates of 2ꢀꢂkbps while main-
taining RS-232 output levels.
PART
TEMP RANGE
ꢂ°ꢁ to +7ꢂ°ꢁ
ꢂ°ꢁ to +7ꢂ°ꢁ
ꢂ°ꢁ to +7ꢂ°ꢁ
-4ꢂ°ꢁ to +8ꢀ°ꢁ
-4ꢂ°ꢁ to +8ꢀ°ꢁ
-4ꢂ°ꢁ to +8ꢀ°ꢁ
ꢂ°ꢁ to +7ꢂ°ꢁ
ꢂ°ꢁ to +7ꢂ°ꢁ
ꢂ°ꢁ to +7ꢂ°ꢁ
ꢂ°ꢁ to +7ꢂ°ꢁ
-4ꢂ°ꢁ to +8ꢀ°ꢁ
-4ꢂ°ꢁ to +8ꢀ°ꢁ
-4ꢂ°ꢁ to +8ꢀ°ꢁ
-4ꢂ°ꢁ to +8ꢀ°ꢁ
-4ꢂ°ꢁ to +8ꢀ°ꢁ
PIN-PACKAGE
16 TQFN-EP*
16 TSSOP
16 SSOP
MAX3221EꢁTE+
MAX3221EꢁUE+
MAX3221EꢁAE+
MAX3221EEAE+
MAX3221EETE+
MAX3221EEUE+
MAX3223EꢁPP+
MAX3223EꢁAP+
MAX3223EꢁUP+
MAX3223EꢁTP+
MAX3223EEPP+
MAX3223EEAP+
MAX3223EEUP+
MAX3223EETP+
16 SSOP
16 TQFN-EP*
16 TSSOP
2ꢂ PDIP
The MAX3221E contains just one driver and one receiver,
making it the smallest single-supplꢅ RS-232 transceiver.
The MAX3223E has two drivers and two receivers. The
MAX3243E is a complete 3-driver/ꢀ-receiver serial port
ideal for notebook or subnotebook computers. It also
includes two noninverting receiver outputs that are alwaꢅs
active, allowing external devices to be monitored without
forward biasing the protection diodes in circuitrꢅ that maꢅ
be powered down.
2ꢂ SSOP
2ꢂ TSSOP
2ꢂ TQFN-EP*
2ꢂ PDIP
2ꢂ SSOP
2ꢂ TSSOP
2ꢂ TQFN-EP*
2ꢂ TSSOP
The MAX3221E, MAX3223E, and MAX3243E are avail-
able in space-saving TQFN, SSOP, and TSSOP pack-
ages.
MAX3223EEUP/V+
*Exposed pad.
+Denotes a lead(Pb)-free/RoꢃS-compliant package.
/V denotes an automotive qualified part.
Applications
Notebook, Subnotebook, and Palmtop ꢁomputers
ꢁellular Phones
Ordering Information continued at end of data sheet.
ꢄatterꢅ-Powered Equipment
ꢃandheld Equipment
Peripherals
Eelector Guide
NO. OF
DRIVERS/
RECEIVERS
VCC
PART
RANGE
(V)
AutoShutdown
Printers
MAX3221E
MAX3223E
MAX3243E
1/1
2/2
3/5
+3.0 to +5.5
+3.0 to +5.5
+3.0 to +5.5
ꢀ
ꢀ
ꢀ
Pin Configurations appear at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
AutoShutdown and UꢁSP are trademarks of Maxim Integrated Products, Inc.
†
ꢁovered bꢅ U.S. Patent numbers 4,636,93ꢂ; 4,679,134; 4,777,ꢀ77; 4,797,899; 4,8ꢂ9,1ꢀ2; 4,897,774; 4,999,761; ꢀ,649,21ꢂ; 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 Maxim’s website at www.maximintegrated.com.
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
ABSOLUTE MAXIMUM RATINGS
V+ to GND (Note 1)..................................................-0.3V to +7V
V- to GND (Note 1) ...................................................+0.3V to -7V
V+ + |V-| (Note 1) .................................................................+13V
Input Voltages
T_IN, EN, FORCEON, FORCEOFF to GND ............-0.3V to +6V
R_IN to GND ...................................................................... 25V
Output Voltages
V
CC
to GND..............................................................-0.3V to +6V
16-Pin TQFN (derate 20.8mW/°C above +70°C) ......1666.7mW
20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW
20-Pin SSOP (derate 8.00mW/°C above +70°C) ...........640mW
20-Pin TSSOP (derate 10.9mW/°C above +70°C) .........879mW
20-Pin TQFN (derate 21.3mW/°C above +70°C) ......1702.1mW
28-Pin SSOP (derate 9.52mW/°C above +70°C)............762mW
28-Pin TSSOP (derate 12.8mW/°C above +70°C) .......1026mW
32-Pin TQFN (derate 37mW/°C above +70°C) ............2963mW
Operating Temperature Ranges
T_OUT to GND................................................................ 13.2V
R_OUT, R2OUTB, INVALID to GND.........-0.3V to (V
Short-Circuit Duration
T_OUT to GND .........................................................Continuous
+ 0.3V)
MAX32_ _EC_ _ ....................................................0°C to +70°C
MAX32_ _EE_ _..................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
CC
Continuous Power Dissipation (T = +70°C)
A
16-Pin SSOP (derate 7.14mW/°C above +70°C) ...........571mW
16-Pin TSSOP (derate 9.4mW/°C above +70°C) ........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, C1–C4 = 0.1µF (Note 2), T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.)
MAX A
CC
A
MIN
PARAMETER
DC CHARACTERISTICS (V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
= 3.3V or 5.0V, T = +25°C)
CC
A
FORCEON = GND,
FORCEOFF = V
Supply Current, AutoShutdown
Supply Current, Shutdown
1.0
1.0
0.3
10
10
1
µA
µA
all R_IN open
CC,
FORCEOFF = GND, all R_IN = GND
Supply Current,
AutoShutdown Disabled
FORCEON = FORCEOFF = V
,
CC
mA
no load
LOGIC INPUTS
Input Logic Threshold Low
0.8
1
V
V
T_IN, EN, FORCEON, FORCEOFF
V
V
= 3.3V
= 5.0V
2.0
2.4
CC
T_IN, EN, FORCEON,
FORCEOFF
Input Logic Threshold High
CC
Transmitter Input Hysteresis
Input Leakage Current
RECEIVER OUTPUTS
Output Leakage Current
Output Voltage Low
0.5
V
0.01
µA
T_IN, EN, FORCEON, FORCEOFF
R_OUT receivers disabled
0.05
10
µA
V
I
I
= 1.6mA
= -1.0mA
0.4
OUT
Output Voltage High
V
- 0.6
V
- 0.1
V
OUT
CC
CC
AutoShutdown (FORCEON = GND, FORCEOFF = V
)
CC
Positive threshold
Negative threshold
2.7
Receiver Input Threshold to
INVALID Output High
Figure 5a
Figure 5a
V
V
-2.7
-0.3
Receiver Input Threshold to
INVALID Output Low
0.3
0.4
I
I
= 1.6mA
= -1.0mA
V
V
INVALID Out Voltage Low
INVALID Output Voltage High
OUT
V
- 0.6
OUT
CC
2
Maxim Integrated
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
ELECTRICAL CHARACTERISTICS (continued)
, unless otherwise noted. Typical values are at T = +25°C.)
MAX A
(V
= +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2), T = T
to T
CC
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Receiver Positive or Negative
Threshold to INVALID High
t
V
CC
V
CC
V
CC
= 5V, Figure 5b
= 5V, Figure 5b
= 5V, Figure 5b
1
µs
INVH
Receiver Positive or Negative
Threshold to INVALID Low
t
30
µs
µs
INVL
Receiver or Transmitter Edge to
Transmitters Enabled
t
100
WU
RECEIVERINPUTS
-25
0.6
0.8
25
V
Input Voltage Range
V
CC
V
CC
V
CC
V
CC
= 3.3V
= 5.0V
= 3.3V
= 5.0V
1.2
1.5
1.5
1.8
0.5
5
Input Threshold Low
Input Threshold High
T
T
= +25°C
= +25°C
V
V
A
2.4
2.4
A
Input Hysteresis
V
Input Resistance
3
7
kΩ
TRANSMITTER OUTPUTS
All transmitter outputs loaded with
3kΩ to ground
Output Voltage Swing
5
5.4
V
Output Resistance
V
CC
= V+ = V- = 0, T
=
2V
300
10M
Ω
OUT
Output Short-Circuit Current
60
25
mA
V
=
12V, V
= 0 or 3V to
CC
OUT
Output Leakage Current
µA
5.5V, transmitters disabled
MOUSE DRIVEABILITY (MAX3243E)
T1IN = T2IN = GND, T3IN = V
,
CC
T3OUT loaded with 3kΩ to GND,
T1OUT and T2OUT loaded with
2.5mA each
Transmitter Output Voltage
5.0
V
ESD PROTECTION
IEC 1000-4-2 Air-Gap Discharge
IEC 1000-4-2 Contact Discharge
Human Body Model
15
8
kV
R_IN, T_OUT
15
Maxim Integrated
3
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
TIMING CHARACTERISTICS—MAX3221E/MAX3223E/MAX3243E
, unless otherwise noted. Typical values are at T = +25°C.)
MAX A
(V
= +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2), T = T
to T
CC
A
MIN
PARAMETER
SYMBOL
CONDITIONS
R = 3kΩ, C = 1000pF,
MIN
TYP
MAX
UNITS
L
L
Maximum Data Rate
250
kbps
one transmitter switching
t
t
0.15
0.15
200
200
100
50
PHL
Receiver Propagation Delay
C = 150pF
L
µs
PLH
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Skew
Normal operation
Normal operation
(Note 3)
ns
ns
ns
ns
t
t
- t
PHL PLH
⏐
⏐
⏐
⏐
Receiver Skew
- t
PHL PLH
V
CC
= 3.3V,
R = 3kΩ to 7kΩ,
L
T = +25°C,
measured from +3V
to -3V or
A
C = 150pF to
L
1000pF
Transition-Region Slew Rate
6
30
V/µs
-3V to +3V, one
transmitter switching
Note 2: C1–C4 = 0.1µF, tested at 3.3V 10ꢀ. C1 = 0.047µF, C2–C4 = 0.33µF, tested at 5.0V 10ꢀ.
Note 3: Transmitter skew is measured at the transmitter zero cross points.
TypicalVOpePatingVChaPactePistics
(V
= +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ and C , T = +25°C, unless otherwise noted.)
L
A
CC
MAX3221E/MAX3223E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3221E/MAX3223E
SLEW RATE vs. LOAD CAPACITANCE
6
5
16
14
12
10
8
V
OUT+
4
3
-SLEW
2
T1 TRANSMITTING AT 250kbps
T2 (MAX3223E) TRANSMITTING AT 15.6kbps
1
+SLEW
0
-1
-2
-3
-4
-5
-6
6
4
V
2
OUT-
FOR DATA RATES UP TO 250kbps
0
0
1000
2000
3000
4000
5000
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
4
Maxim Integrated
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
TypicalVOpePatingVChaPactePisticsV(continued)
(V
= +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ and C , T = +25°C, unless otherwise noted.)
L A
CC
MAX3221E/MAX3223E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3243E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
45
40
35
30
25
20
15
10
5
6
5
V
OUT+
4
250kbps
3
1 TRANSMITTER AT 250kbps
2 TRANSMITTERS AT 15.6kbps
2
120kbps
1
0
-1
-2
-3
-4
-5
-6
20kbps
V
OUT-
T1 TRANSMITTING AT 250kbps
T2 (MAX3223E) TRANSMITTING AT 15.6kbps
0
0
1000
2000
3000
4000
5000
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3243E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3243E
SLEW RATE vs. LOAD CAPACITANCE
14
12
10
8
60
50
40
30
20
10
0
250kbps
120kbps
6
20kbps
4
T1 TRANSMITTING AT 250kbps
T2 (MAX3223E) TRANSMITTING AT 15.6kbps
2
0
0
1000
2000
3000
4000
5000
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
Maxim Integrated
5
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
-inVSescPiption
PIN
MAX3221E
MAX3223E
MAX3243E
FUNCTION
DIP/
SO/
NAME
TQFN- SSOP/
TQFN-
EP
TQFN-
EP
SSOP/ SSOP/
TSSOP TSSOP
EP
TSSOP
Receiver Enable Control. Drive low for normal
operation. Drive high to force the receiver outputs
(R_OUT) into a high-impedance state.
14
1
19
1
—
22
EN
Positive terminal of the voltage doubler Charge-Pump
Capacitor
16
15
1
2
3
4
1
20
2
2
3
4
28
27
24
28
27
23
C1+
V+
+5.5V generated by the charge pump
Negative terminal of the voltage doubler Charge-Pump
Capacitor
C1-
2
3
4
5
5
6
7
8
3
4
5
6
1
2
29
30
C2+
C2-
V-
Positive terminal of inverting Charge-Pump Capacitor
Negative terminal of inverting Charge-Pump Capacitor
-5.5V generated by the charge pump
5
7
3
31
7, 14
9, 16
4-8
1-5
R_IN
RS-232 Receiver Inputs
13, 14,
15, 17,
18
6
9
8, 13
10, 15
15-19
21
R_OUT
TTL/CMOS Receiver Outputs
Output of the Valid Signal Detector. INVALID is enabled
high if a valid RS-232 level is present on any receiver
input.
7
8
9
10
11
12
9
11
12, 13
14
—
INVALID
T_IN
12, 13, 10, 11,
10, 11
12
TTL/CMOS Transmitter Inputs
14
12
Drive high to override automatic circuitry keeping
transmitters and charge pump on (FORCEOFF must be
high) (Table 1).
23
—
FORCEON
T_OUT
9, 10,
11
10
—
13
—
6, 15
—
8, 17
—
6, 7, 8
19
RS-232 Transmitter Outputs
TTL/CMOS Noninverting Complementary Receiver
Output. Always active.
20
R2OUTB
GND
11
12
14
15
16
17
18
19
25
26
24
26
Ground
V
CC
+3.0V to +5.5V Supply Voltage
Force-Off Input, active low. Drive low to shut down
transmitters, receivers (MAX3243E, except R2OUTB),
and on-board charge pump. This overrides all
automatic circuitry and FORCEON (Table 1).
FORCEOF
F
13
—
16
—
18
—
20
—
22
—
—
21
SHDN
Shutdown Control, Active Low
6
Maxim Integrated
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
-inVSescPiption (continued)
PIN
MAX3221E
MAX3223E
MAX3243E
FUNCTION
DIP/
SO/
TQFN- SSOP/
TQFN-
EP
TQFN-
EP
SSOP/ SSOP/
TSSOP TSSOP
NAME
EP
TSSOP
Noninverting Complementary Receiver Outputs.
Always active.
—
—
—
—
—
—
—
—
—
—
—
19, 20
R_OUTB
N.C.
9, 16,
25, 32
—
—
No Connection. Not internally connected.
Exposed Paddle (TQFN package only). Solder the exposed
paddle to the ground plane or leave unconnected.
—
—
—
EP
_______________SetailedVSescPiption
POWER-
MANAGEMENT
UNIT OR
KEYBOARD
CONTROLLER
FORCEOFF
FORCEON
INVALID
SualVChaPgeD-umpVkoltageVConvePteP
The MAX3221E/MAX3223E/MAX3243E’s internal power
supply consists of a regulated dual charge pump that
provides output voltages of +5.5V (doubling charge
pump) and -5.5V (inverting charge pump), over the
+3.0V to +5.5V V
range. The charge pumps operate
CC
MAX3243E
in discontinuous mode: if the output voltages are less
than 5.5V, the charge pumps are enabled; if the output
voltages exceed 5.5V, the charge pumps are disabled.
Each charge pump requires a flying capacitor (C1, C2)
and a reservoir capacitor (C3, C4) to generate the V+
and V- supplies.
RED232VTPansmittePs
The transmitters are inverting level translators that con-
vert CMOS-logic levels to 5.0V EIA/TIA-232 levels. They
guarantee a 250kbps data rate with worst-case loads
of 3kΩ in parallel with 1000pF, providing compatibility
with PC-to-PC communication software such as
LapLink™. Transmitters can be paralleled to drive mul-
tiple receivers. The MAX3243E has been specifically
designed to drive serial mice. Figure 1 shows a com-
plete system connection. When FORCEOFF is driven to
ground, or the AutoShutdown circuitry senses invalid
voltage levels on all receiver inputs, the transmitters are
disabled and the outputs are forced into a high-imped-
ance state. When powered off or shut down, the output
can be driven up to 12V. The transmitter inputs do not
have pull-up resistors.
I/O
CHIP
WITH
UART
CPU
RS-232
Figure 1. Interface Under Control of PMU
LapLink is a trademark of Traveling Software.
Maxim Integrated
7
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
RED232VReceivePs
V
CC
The MAX3221E/MAX3223E/MAX3243E’s receivers con-
vert RS-232 signals to CMOS-logic output levels. All
receivers have inverting three-state outputs and can be
active or inactive. In shutdown (FORCEOFF = low) or in
AutoShutdown, the MAX3221E/MAX3223E’s receivers
are active (Table 1). Drive EN high to place the receiv-
er(s) in a high-impedance state. The MAX3243E’s
receivers are high-impedance when the part is in shut-
down (FORCEOFF = low).
PROTECTION
DIODE
PREVIOUS
RS-232
V
CC
I
Rx
Tx
The MAX3243E features an extra, always-active com-
plementary output (R2OUTB). R2OUTB monitors
receiver activity while the other receivers are high-
impedance. This allows Ring Indicator to be monitored
without forward biasing other devices connected to the
5kΩ
UART
GND
SHDN = GND
receiver outputs. This is ideal for systems where V
CC
drops to 0 in shutdown to accommodate peripherals
such as UARTs (Figure 2).
a) OLDER RS-232: POWERED-DOWN UART DRAWS CURRENT FROM ACTIVE
The MAX3221E/MAX3223E/MAX3243E feature an
INVALID output that is enabled low when no valid RS-232
signal levels have been detected on all receiver inputs.
INVALID is functional in any mode (Figures 3 and 5).
RECEIVER OUTPUT IN SHUTDOWN.
V
CC
TO
µP
LOGIC
TRANSITION
DETECTOR
AutoEhutdown
The MAX3221E/MAX3223E/MAX3243E achieve a 1µA
supply current with Maxim’s new AutoShutdown fea-
ture, which operates when FORCEON is low and
FORCEOFF is high. When these devices sense no valid
signal levels on all receiver inputs for 30µs, the on-
board charge pump and drivers are shut off, reducing
supply current to 1µA. This occurs if the RS-232 cable
is disconnected or the connected peripheral transmit-
ters are turned off. The device turns on again when a
valid level is applied to any RS-232 receiver input. As a
result, the system saves power without changes to the
existing BIOS or operating system.
Table 2 and Figure 3c summarize the MAX3221E/
MAX3223E/MAX3243E operating modes. FORCEON
and FORCEOFF override AutoShutdown. When neither
control is asserted, the IC selects between these states
automatically, based on receiver input levels. Figures
3a, 3b, and 5a depict valid and invalid RS-232 receiver
levels. Figure 5 shows the input levels and timing dia-
gram for AutoShutdown operation.
I
MAX3243E
PROTECTION
DIODE
R2OUTB
V
CC
R2IN
Rx
R2OUT
THREE-STATED
UART
5kΩ
T1OUT
T1IN
Tx
GND
FORCEOFF = GND
b) NEW MAX3243E: IN SHUTDOWN, R2OUTB IS USED TO MONITOR EXTERNAL
DEVICES AND R2OUT IS THREE STATED, ELIMINATING A CURRENT PATH
THROUGH THE UART'S PROTECTION DIODE.
Figure 2. The MAX3243E detects RS-232 activity when the
UART and interface are shut down.
8
Maxim Integrated
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
Table 1. Output Control Truth Table
VALID
RECEIVER
LEVEL
R_OUT
EN
OPERATION
R_OUT
R2OUTB
FORCEON
(MAX3221E/
T_OUT
(MAX3221E/
MAX3223E)
FORCEOFF
STATUS
(MAX3243E) (MAX3243E)
MAX3223E)
X
X
1
1
0
0
0
0
0
0
1
1
1
1
1
1
0
1
0
1
0
1
0
1
X
High-Z
High-Z
Active
Active
Active
Active
High-Z
High-Z
Active
High-Z
Active
High-Z
Active
High-Z
Active
High-Z
High-Z
High-Z
Active
Active
Active
Active
Active
Active
Active
Active
Active
Active
Active
Active
Active
Active
Shutdown
(Forced Off)
X
X
Normal Operation
(Forced On)
X
Yes
Yes
No
No
Normal Operation
(AutoShutdown)
Shutdown
(AutoShutdown)
X = Don’t Care
+2.7V
+0.3V
TO MAX32_ _E
POWER SUPPLY
AND TRANSMITTERS
TO MAX32_ _E
POWER SUPPLY
R_IN
-2.7V
R_IN
-0.3V
30µs
COUNTER
R
30µs
COUNTER
R
INVALID
INVALID
*TRANSMITTERS ARE ENABLED IF:
ANY RECEIVER INPUT IS GREATER THAN +2.7V OR LESS THAN -2.7V.
ANY RECEIVER INPUT HAS BEEN BETWEEN +0.3V AND -0.3V FOR LESS THAN 30µs.
* TRANSMITTERS ARE DISABLED, REDUCING SUPPLY CURRENT TO 1µA IF
ALL RECEIVER INPUTS ARE BETWEEN +0.3V AND -0.3V FOR AT LEAST 30µs.
Figure 3b. MAX32_ _E with Transmitters Enabled Using
AutoShutdown
Figure 3a. MAX32_ _E Entering 1µA Supply Mode via
AutoShutdown
A mouse or other system with AutoShutdown may need
time to wake up. Figure 4 shows a circuit that forces
the transmitters on for 100ms, allowing enough time for
the other system to realize that the MAX3221E/
MAX3223E/ MAX3243E are awake. If the other system
transmits valid RS-232 signals within that time, the RS-
232 ports on both systems remain enabled.
±±15kV ESV-Potection
As with all Maxim devices, ESD-protection structures are
incorporated on all pins to protect against electrostatic
discharges encountered during handling and assembly.
The driver outputs and receiver inputs of the
MAX3221E/MAX3223E/MAX3243E have extra protection
against static electricity. Maxim’s engineers have devel-
oped state-of-the-art structures to protect these pins
against ESD of 15kV without damage. The ESD struc-
tures withstand high ESD in all states: normal operation,
shutdown, and powered down. After an ESD event,
Maxim’s E versions keep working without latchup,
whereas competing RS-232 products can latch and
must be powered down to remove latchup. See Table 4.
When shut down, the device’s charge pumps are off,
V+ is pulled to V , V- is pulled to ground, and the
CC
transmitter outputs are high impedance. The time
required to exit shutdown is typically 100µs (Figure 5b).
EoftwaPeDContPolledVEhutdown
If direct software control is desired, INVALID can be
used to indicate DTR or Ring Indicator signal. Connect
FORCEOFF and FORCEON together to disable Auto-
Shutdown so the line acts like a SHDN input.
Maxim Integrated
9
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
FORCEOFF
Table 2. INVALID Truth Table
POWER DOWN
FORCEON
RS-232 SIGNAL PRESENT
INVALID OUTPUT
INVALID
AT ANY RECEIVER INPUT
INVALID IS AN INTERNALLY GENERATED SIGNAL
THAT IS USED BY THE AUTOSHUTDOWN LOGIC
AND APPEARS AS AN OUTPUT OF THE DEVICE.
Yes
No
High
Low
POWER DOWN IS ONLY AN INTERNAL SIGNAL.
IT CONTROLS THE OPERATIONAL STATUS OF
THE TRANSMITTERS AND THE POWER SUPPLIES.
Figure 3c. MAX32_ _E AutoShutdown Logic
TRANSMITTERS ENABLED, INVALID HIGH
+2.7V
POWER-
MASTER SHDN LINE
MANAGEMENT
INDETERMINATE
0.1µF
1MΩ
UNIT
+0.3V
0
AUTOSHUTDOWN, TRANSMITTERS DISABLED,
FORCEOFF FORCEON
1µA SUPPLY CURRENT, INVALID LOW
-0.3V
MAX3221E
MAX3223E
MAX3243E
INDETERMINATE
-2.7V
TRANSMITTERS ENABLED, INVALID HIGH
Figure 4. AutoShutdown with Initial Turn-On to Wake Up a
Mouse or Another System
a)
ESD protection can be tested in various ways; the trans-
mitter outputs and receiver inputs of this product family
are characterized for protection to the following limits:
1) 15kV using the Human Body Model
2) 8kV using the Contact Discharge Method specified
in IEC1000-4-2
RECEIVER
INPUT
VOLTAGE
(V)
INVALID
REGION
3) 15kV using IEC1000-4-2’s Air-Gap Method
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, test methodology, and test results.
V
CC
0
INVALID
OUTPUT
(V)
Human Body Model
Figure 6a shows the Human Body Model, and Figure
6b shows the current waveform it generates when dis-
charged into a low impedance. This model consists of a
100pF capacitor charged to the ESD voltage of interest,
which is then discharged into the test device through a
1.5kΩ resistor.
t
t
INVH
INVL
t
WU
V+
V
CC
0
V-
IEC1000-4-2
The IEC1000-4-2 standard covers ESD testing and per-
formance of finished equipment; it does not specifically
refer to integrated circuits. The MAX3221E/ MAX3223E/
MAX3243E help you design equipment that meets
b)
Figure 5. AutoShutdown Trip Levels
10
Maxim Integrated
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
R
1MΩ
R 1500Ω
D
C
R
50MΩ to 100MΩ
R 330Ω
D
C
DISCHARGE
RESISTANCE
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
CHARGE CURRENT
LIMIT RESISTOR
HIGH-
VOLTAGE
DC
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
DEVICE
UNDER
TEST
C
s
100pF
STORAGE
CAPACITOR
C
s
150pF
STORAGE
CAPACITOR
SOURCE
SOURCE
Figure 7a. IEC1000-4-2 ESD Test Model
Figure 6a. Human Body ESD Test Models
I
100%
I
P
100%
90%
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
I
r
90%
AMPERES
36.8%
10%
0
TIME
0
t
RL
t
DL
CURRENT WAVEFORM
10%
= 0.7ns to 1ns
t
Figure 6b. Human Body Model Current Waveform
r
t
30ns
60ns
Level 4 (the highest level) of IEC1000-4-2, without the
need for additional ESD-protection components.
Figure 7b. IEC1000-4-2 ESD Generator Current Waveform
The major difference between tests done using the
Human Body Model and IEC1000-4-2 is higher peak
current in IEC1000-4-2, because series resistance is
lower in the IEC1000-4-2 model. Hence, the ESD with-
stand voltage measured to IEC1000-4-2 is generally
lower than that measured using the Human Body
Model. Figure 7a shows the IEEE1000-4-2 model and
Figure 7b shows the current waveform for the 8kV
IEC1000-4-2 Level 4 ESD contact-discharge test.
Therefore, after PC board assembly, the Machine Model
is less relevant to I/O ports.
___________ApplicationsVInfoPmation
CapacitoPVEelection
The capacitor type used for C1–C4 is not critical for
proper operation; either polarized or nonpolarized
capacitors may be used. The charge pump requires
0.1µF capacitors for 3.3V operation. For other supply
voltages, refer to Table 3 for required capacitor values.
Do not use values smaller than those listed in Table 3.
Increasing the capacitor values (e.g., by a factor of 2)
reduces ripple on the transmitter outputs and slightly
reduces power consumption. C2, C3, and C4 can be
increased without changing C1’s value. However, do
not increase C1 without also increasing the values of
C2, C3, and C4 to maintain the proper ratios (C1 to
the other capacitors).
The air-gap test involves approaching the device with a
charged probe. The contact-discharge method connects
the probe to the device before the probe is energized.
Machine Model
The Machine Model for ESD tests all pins using a 200pF
storage capacitor and zero discharge resistance. Its
objective is to emulate the stress caused by contact that
occurs with handling and assembly during manufactur-
ing. Of course, all pins require this protection during
manufactur, not just RS-232 inputs and outputs.
Maxim Integrated
11
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
When using the minimum required capacitor values,
Table 3. Required Capacitor Values
make sure the capacitor value does not degrade exces-
V
CC
C1, C
C2, C3, C4
BYPASS
sively with temperature. If in doubt, use capacitors with a
larger nominal value. The capacitor’s equivalent series
resistance (ESR) usually rises at low temperatures and
influences the amount of ripple on V+ and V-.
(V)
(µF)
0.22
0.1
(µF)
3.0 to 3.6
3.15 to 3.6
4.5 to 5.5
3.0 to 5.5
0.22
0.1
0.33
1
0.047
0.22
-owePDEupplyVSecouplingV
In most circumstances, a 0.1µF V
bypass capacitor is
CC
adequate. In applications that are sensitive to power-
supply noise, use a capacitor of the same value as the
charge-pump capacitor C1. Connect bypass capacitors
as close to the IC as possible.
FORCEON =
FORCEOFF
T2OUT
5V/div
TPansmittePVOutputs
whenV xitingVEhutdown
Figure 8 shows two transmitter outputs when exiting
shut down mode. As they become active, the two trans-
mitter outputs are shown going to opposite RS-232 lev-
els (one transmitter output is high, the other is low).
Each transmitter is loaded with 3kΩ in parallel with
1000pF. The transmitter outputs display no ringing or
undesirable transients as they come out of shutdown,
and are enabled only when the magnitude of V-
exceeds approximately -3V.
2V/div
T1OUT
V
= 3.3V
CC
C1–C4 = 0.1µF
40µs/div
HighVSataVRates
The MAX3221E/MAX3223E/MAX3243E maintain the RS-
232 5.0V minimum transmitter output voltage even at
high data rates. Figure 9 shows a transmitter loopback
test circuit. Figure 10 shows a loopback test result at
120kbps, and Figure 11 shows the same test at 250kbps.
For Figure 10, all three transmitters were driven simulta-
neously at 120kbps into RS-232 loads in parallel with
1000pF. For Figure 11, a single transmitter was driven at
250kbps, and all three transmitters were loaded with an
RS-232 receiver in parallel with 1000pF.
Figure 8. Transmitter Outputs Exiting Shutdown or Powering Up
as Logitech and Microsoft. When tested, the MAX3243E
successfully drove all serial mice and met their respective
current and voltage requirements. The MAX3243E’s regu-
lated dual charge pump ensures the transmitters will sup-
ply at least 5V during worst-case conditions. Figure 12a
shows the transmitter outputs under increasing load cur-
rent. The AutoShutdown feature does not work with a
mouse, so FORCEOFF and FORCEON should be con-
nected to V . Figure 12b (on the following page) shows
CC
a mouse driver test circuit. To achieve mouse driveability
with 1µA supply current when the port is inactive, use
parts with the AutoShutdown Plus™ feature (such as the
MAX3244E and MAX3245E).
MouseVSPiveabilityV(MAX3243 )
The MAX3243E has been specifically designed to power
serial mice while operating from low-voltage power sup-
plies. It has been tested with leading mouse brands such
AutoShutdown Plus is a trademark of Maxim Integrated Products, Inc.
12
Maxim Integrated
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
Table 4. 15kV ESD-Protected, 3.0V to 5.5V Powered RS-232 Transceivers from Maxim
SUPPLY
VOLTAGE
RANGE
(V)
HUMAN IEC 1000-4-2 IEC 1000-4-2
NO. SUPPLY
Auto-
Auto-
GUARANTEED
DATA RATE
(kbps)
BODY CONTACT AIR-GAP
PART
OF CURRENT Shutdown Shutdown
MODEL DISCHARGE DISCHARGE
Tx/Rx
(µA)
Plus
(kV)
(kV)
(kV)
MAX3241E +3.0 to +5.5
MAX3243E +3.0 to +5.5
MAX3244E +3.0 to +5.5
MAX3245E +3.0 to +5.5
MAX3232E +3.0 to +5.5
MAX3222E +3.0 to +5.5
MAX3223E +3.0 to +5.5
MAX3224E +3.0 to +5.5
MAX3225E +3.0 to +5.5
MAX3221E +3.0 to +5.5
MAX3226E +3.0 to +5.5
MAX3227E +3.0 to +5.5
3/5
3/5
3/5
3/5
2/2
2/2
2/2
2/2
2/2
1/1
1/1
1/1
300
1
—
—
—
Yes
—
15
15
15
15
15
15
15
15
15
15
15
15
8
8
8
8
8
8
8
8
8
8
8
8
15
15
15
15
15
15
15
15
15
15
15
15
250
250
1
Yes
Yes
—
250
1
—
1Mbps
250
300
300
1
—
—
—
250
—
Yes
—
250
1
Yes
Yes
—
250
1
—
1Mbps
250
1
Yes
—
1
Yes
Yes
250
1
—
1Mbps
V
CC
0.1µF
5V/div
5V/div
5V/div
T1IN
V
CC
C1+
V+
V-
C3
C4
C1
C1-
C2+
MAX3221E
MAX3223E
MAX3243E
T1OUT
R1OUT
C2
C2-
T_ OUT
T_ IN
V
= 3.3V
CC
2µs/div
R_ IN
R_ OUT
EN (MAX3221E/3E)
Figure 10. Loopback Test Result at 120kbps
5kΩ
0
1000pF
V
CC
FORCEOFF
GND
Figure 9. Loopback Test Circuit
Maxim Integrated
13
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
6
5
V
4
3
5V/div
5V/div
5V/div
OUT+
T1IN
T1OUT
R1OUT
V
= 3.0V
CC
2
V
V
1
OUT+
0
-1
-2
-3
-4
-5
-6
V
CC
1
OUT-
V
OUT-
9
V
= 3.3V
CC
0
2
3
4
5
6
7
8
10
2µs/div
LOAD CURRENT PER TRANSMITTER (mA)
Figure 11. Loopback Test Result at 250kbps
Figure 12a. Transmitter Output Voltage vs. Load Current per
Transmitter
Table 5. Logic Family Compatibility with
Various Supply Voltages
OPdePingVInfoPmationV(continued)
PART
TEMP RANGE
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
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
28 Wide SO
28 SSOP
SYSTEM
MAX3243ECWI+
MAX3243ECAI+
MAX3243ECUI+
MAX3243EEWI+
MAX3243EEAI+
MAX3243EEUI+
MAX3243ECTJ+
POWER-
SUPPLY
VOLTAGE
(V)
V
CC
SUPPLY
VOLTAGE
(V)
COMPATIBILITY
28 TSSOP
28 Wide SO
28 SSOP
Compatible with all CMOS
families.
3.3
3.3
5
28 TSSOP
Compatible with all TTL and
CMOS-logic families.
5
32 TQFN-EP*
32 TQFN-EP*
Compatible with ACT and
HCT CMOS, and with TTL.
Incompatible with AC, HC,
or CD4000 CMOS.
MAX3243EETJ+
*Exposed pad.
5
3.3
+Denotes a lead(Pb)-free/RoHS-compliant package.
IntePconnectionVwithV3kVandV1kVLogic
The MAX3221E/MAX3223E/MAX3243E can directly
interface with various 5V logic families, including ACT
and xHCT CMOS. See Table 5 for more information on
possible combinations of interconnections.
___________________ChipVInfoPmation
PROCESS: BiCMOS
14
Maxim Integrated
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
+3.3V
26
0.1µF
V
CC
27
3
28
C1+
V+
C1
0.1µF
C3
0.1µF
24
1
C1-
C2+
COMPUTER SERIAL PORT
MAX3243E
V-
C4
C2
0.1µF
0.1µF
2
C2-
+V
+V
-V
T1IN
T1OUT
9
14
T2IN
T3IN
LOGIC
INPUTS
T2OUT 10
13
12
11
T3OUT
GND
Tx
R2OUTB
20
R1OUT
R2OUT
R3OUT
R1IN
4
5
19
18
17
5kΩ
R2IN
5kΩ
R3IN
5kΩ
LOGIC
OUTPUTS
6
7
8
RS-232
INPUTS
R4OUT
R5OUT
16
R4IN
5kΩ
5kΩ
SERIAL
MOUSE
15
23
R5IN
FORCEON
FORCEOFF
INVALID
V
CC
CC
22
21
V
TO POWER-
MANAGEMENT
UNIT
GND
25
Figure 12b. Mouse Driver Test Circuit
Maxim Integrated
15
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
TypicalVOpePatingVCiPcuits
+3.3V
15
0.1µF
C
BYPASS
V
CC
3
7
2
C1+
V+
V-
C1
C3
0.1µF
4
5
6
0.1µF
C1-
C2+
MAX3221E*
+3.3V
0.1µF
C4
0.1µF
26
C2
0.1µF
C
BYPASS
C2-
V
CC
27
3
28
C1+
V+
11
9
T1IN
C1
0.1µF
T1OUT 13
C3
0.1µF
24
1
C1-
C2+
R1OUT
R1IN
5kΩ
8
MAX3243E
V-
C4
0.1µF
C2
0.1µF
2
C2-
T1IN
T1OUT
9
14
TO POWER-
MANAGEMENT
UNIT
EN
INVALID 10
1
RS-232
OUTPUTS
T2IN
T3IN
LOGIC
INPUTS
T2OUT 10
13
12
FORCEOFF
FORCEON
16
12
V
CC
11
T3OUT
GND
14
R2OUTB
R1OUT
20
19
+3.3V
R1IN
5kΩ
4
5
19
0.1µF
C
BYPASS
V
CC
3
7
2
C1+
V+
V-
R2OUT
R3OUT
R4OUT
R2IN
18
17
16
C1
0.1µF
C3
0.1µF
4
5
6
C1-
C2+
5kΩ
R3IN
5kΩ
MAX3223E**
LOGIC
OUTPUTS
C4
0.1µF
6
7
8
RS-232
INPUTS
C2
0.1µF
C2-
13
T1IN
T1OUT 17
R4IN
TTL/CMOS
INPUTS
RS-232
OUTPUTS
5kΩ
8
T2IN
T2OUT
12
R5OUT
15
23
R5IN
16
15 R1OUT
R1IN
5kΩ
FORCEON
FORCEOFF
INVALID
TTL/CMOS
OUTPUTS
RS-232
INPUTS
5kΩ
22
21
V
CC
R2IN
10 R2OUT
9
TO POWER-
MANAGEMENT UNIT
5kΩ
GND
25
TO POWER-
MANAGEMENT
UNIT
EN
INVALID 11
1
*MAX3221E PIN OUT REFERS TO SSOP/TSSOP PACKAGES.
**MAX3223E PIN OUT REFERS TO DIP/SSOP/TSSOP PACKAGES.
FORCEOFF
FORCEON
20
14
V
CC
GND
18
16
Maxim Integrated
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
-inVConfiguPationsV
TOP VIEW
+
+
EN
C1+
V+
EN
16 FORCEOFF
FORCEOFF
1
2
3
4
5
6
7
8
1
2
20
19
18
17
16
15
14
13
12
11
15
V
V
C1+
V+
CC
CC
14
GND
GND
3
C1-
C1-
C2+
C2-
V-
13 T1OUT
MAX3221E
T1OUT
R1IN
4
MAX3223E
C2+
C2-
FORCEON
12
5
11 T1IN
10 INVALID
R1OUT
FORCEON
T1IN
6
V-
7
T2OUT
9
R1IN
R1OUT
8
R2IN
T2IN
9
SSOP/TSSOP
R2OUT
INVALID
10
DIP/SSOP/TSSOP
+
TOP VIEW
C2+
C2-
C1+
V+
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
24 23 22 21 20 19 18 17
V-
V
3
CC
R1IN
R2IN
R3IN
R4IN
R5IN
T1OUT
T2OUT
T3OUT
T3IN
T2IN
T1IN
GND
4
16
N.C.
N.C. 25
C1-
V
5
CC 26
V+ 27
15 R3OUT
14 R4OUT
13 R5OUT
MAX3243E
FORCEON
FORCEOFF
INVALID
R2OUTB
R1OUT
R2OUT
R3OUT
R4OUT
R5OUT
6
7
C1+ 28
MAX3243E
8
C2+ 29
C2- 30
V- 31
12 T1IN
11 T2IN
10 T3IN
9
10
11
12
13
14
N.C. 32
9
N.C.
+
1
2
3
4
5
6
7
8
SO/SSOP/TSSOP
TQFN-EP
*CONNECT EP TO GND OR LEAVE UNCONNECTED
Maxim Integrated
17
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
-inVConfiguPationsV(continued)
TOP VIEW
12
11
10
9
15
14
13
12
11
T2IN
10
9
GND 16
VCC 17
T1IN
8
7
6
5
FORCEOFF 13
EN 14
INVALID
INVALID
R1OUT
R1IN
8
FORCEOFF 18
R2OUT
R2IN
MAX3221E*
MAX3223E*
V+
15
16
EN
V+
7
19
20
C1+
6
T2OUT
+
+
1
2
3
4
1
2
3
4
5
TQFN
TQFN
*CONNECT EP TO GND OR LEAVE UNCONNECTED
*CONNECT EP TO GND OR LEAVE UNCONNECTED
-ac5ageVInfoPmation
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing per-
tains to the package regardless of RoHS status.
LAND
PATTERN NO.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
16 TQFN-EP
16 SSOP
T1655+2
A16+2
21-0140
21-0056
21-0066
21-0140
21-0056
21-0066
21-0043
21-0042
21-0056
21-0066
21-0144
90-0072
90-0106
90-0117
90-0010
90-0094
90-0116
—
16 TSSOP
20 TQFN-EP
20 SSOP
U16+1
T2055+5
A20+2
20 TSSOP
20 PDIP
U20+2
P20+3
28 Wide SO
28 SSOP
W28+6
A28+1
90-0109
90-0095
90-0171
90-0125
28 TSSOP
32 TQFN-EP
U28+2
T3277+2
18
Maxim Integrated
MAX3221E/MAX3223E/MAX3243E
±±15kV ESD-Potected,V±µA,V3.0kVtoV1.1k,V2105bps,
RED232VTPansceivePsVwithVAutoEhutdown
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
Added MAX3223EEUP/V+ automotive qualified part and updated Ordering
Information to show lead-free versions
7
8/11
1, 2, 14, 17, 18
Maxim cannot me responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
19
The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc.
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
©
2011 Maxim Integrated
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