MAXIM MAX233AEWP-TG36

MAX220–MAX249
LE
AVAILAB
+5V-Powered, Multichannel RS-232
Drivers/Receivers
General Description
Next-Generation Device Features
The MAX220–MAX249 family of line drivers/receivers is
intended for all EIA/TIA-232E and V.28/V.24 communications interfaces, particularly applications where ±12V is
not available.
These parts are especially useful in battery-powered systems, since their low-power shutdown mode reduces
power dissipation to less than 5µW. The MAX225,
MAX233, MAX235, and MAX245/MAX246/MAX247 use
no external components and are recommended for applications where printed circuit board space is critical.
♦ For Low-Voltage, Integrated ESD Applications
MAX3222E/MAX3232E/MAX3237E/MAX3241E/
MAX3246E: +3.0V to +5.5V, Low-Power, Up to
1Mbps, True RS-232 Transceivers Using Four
0.1µF External Capacitors (MAX3246E Available
in a UCSP™ Package)
♦ For Low-Cost Applications
MAX221E: ±15kV ESD-Protected, +5V, 1µA,
Single RS-232 Transceiver with AutoShutdown™
________________________Applications
PART
TEMP RANGE
PIN-PACKAGE
MAX220CPE+
0°C to +70°C
16 Plastic DIP
MAX220CSE+
0°C to +70°C
16 Narrow SO
MAX220CWE+
0°C to +70°C
16 Wide SO
MAX220C/D
0°C to +70°C
Dice*
MAX220EPE+
-40°C to +85°C
16 Plastic DIP
MAX220ESE+
-40°C to +85°C
16 Narrow SO
MAX220EWE+
-40°C to +85°C
16 Wide SO
MAX220EJE
-40°C to +85°C
16 CERDIP
MAX220MJE
-55°C to +125°C
16 CERDIP
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Contact factory for dice specifications.
Portable Computers
Low-Power Modems
Interface Translation
Battery-Powered RS-232 Systems
Multidrop RS-232 Networks
AutoShutdown and UCSP are trademarks of Maxim Integrated
Products, Inc.
Ordering Information
Ordering Information continued at end of data sheet.
Selection Table
Selection
Table
Power
No. of
Nominal
Supply
RS-232
No. of
Cap. Value
(V)
Drivers/Rx Ext. Caps (µF)
+5
2/2
4
0.047/0.33
+5
2/2
4
0.1
+5
4/5
4
1.0 (0.1)
+5
5/5
0
—
+5
5/0
4
1.0 (0.1)
+5 and
2/2
2
1.0 (0.1)
+7.5 to +13.2
MAX232 (MAX202) +5
2/2
4
1.0 (0.1)
MAX232A
+5
2/2
4
0.1
MAX233 (MAX203) +5
2/2
0
—
MAX233A
+5
2/2
0
—
MAX234 (MAX204) +5
4/0
4
1.0 (0.1)
MAX235 (MAX205) +5
5/5
0
—
MAX236 (MAX206) +5
4/3
4
1.0 (0.1)
MAX237 (MAX207) +5
5/3
4
1.0 (0.1)
MAX238 (MAX208) +5
4/4
4
1.0 (0.1)
MAX239 (MAX209) +5 and
3/5
2
1.0 (0.1)
+7.5 to +13.2
MAX240
+5
5/5
4
1.0
MAX241 (MAX211) +5
4/5
4
1.0 (0.1)
MAX242
+5
2/2
4
0.1
MAX243
+5
2/2
4
0.1
MAX244
+5
8/10
4
1.0
MAX245
+5
8/10
0
—
Pin
Configurations+5appear at end
MAX246
8/10 of data0sheet. —
MAX247
+5 continued
8/9at end of0 data sheet.
—
Functional
Diagrams
MAX248
+5
8/8
4
1.0
UCSP
is
a
trademark
of
Maxim
Integrated
Products,
Inc.
MAX249
+5
6/10
4
1.0
Part
Number
MAX220
MAX222
MAX223 (MAX213)
MAX225
MAX230 (MAX200)
MAX231 (MAX201)
SHDN
& ThreeState
No
Yes
Yes
Yes
Yes
No
Rx
Active in
SHDN
—
—
✔
✔
—
—
Data Rate
(kbps)
120
200
120
120
120
120
No
No
No
No
No
Yes
Yes
No
No
No
—
—
—
—
—
—
—
—
—
—
120 (64)
200
120
200
120
120
120
120
120
120
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
—
—
✔
—
—
✔
✔
✔
✔
✔
120
120
200
200
120
120
120
120
120
120
Functional Diagrams
Features
Ultra-low-power, industry-standard pinout
Low-power shutdown
MAX241 and receivers active in shutdown
Available in SO
5 drivers with shutdown
Standard +5/+12V or battery supplies;
same functions as MAX232
Industry standard
Higher slew rate, small caps
No external caps
No external caps, high slew rate
Replaces 1488
No external caps
Shutdown, three state
Complements IBM PC serial port
Replaces 1488 and 1489
Standard +5/+12V or battery supplies;
single-package solution for IBM PC serial port
DIP or flatpack package
Complete IBM PC serial port
Separate shutdown and enable
Open-line detection simplifies cabling
High slew rate
High slew rate, int. caps, two shutdown modes
High slew rate, int. caps, three shutdown modes
High slew rate, int. caps, nine operating modes
High slew rate, selective half-chip enables
Available in quad flatpack package
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-4323; Rev 16; 7/10
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243
16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ...696mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW
18-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW
20-Pin Wide SO (derate 10.00mW/°C above +70°C)....800mW
20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW
18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW
Operating Temperature Ranges
MAX2_ _AC_ _, MAX2_ _C_ _ .............................0°C to +70°C
MAX2_ _AE_ _, MAX2_ _E_ _ ..........................-40°C to +85°C
MAX2_ _AM_ _, MAX2_ _M_ _ .......................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)
20 PDIP (P20M+1) .......................................................+225°C
All other lead(Pb)-free packages.................................+260°C
All other packages containing lead(Pb) ......................+240°C
(Voltages referenced to GND.)
VCC ...........................................................................-0.3V to +6V
V+ (Note 1) ..................................................(VCC - 0.3V) to +14V
V- (Note 1) ..............................................................+0.3V to -14V
Input Voltages
TIN .............................................................-0.3V to (VCC - 0.3V)
RIN (Except MAX220) ........................................................±30V
RIN (MAX220) ....................................................................±25V
TOUT (Except MAX220) (Note 2) ......................................±15V
TOUT (MAX220)..............................................................±13.2V
Output Voltages
TOUT..................................................................................±15V
ROUT........................................................-0.3V to (VCC + 0.3V)
Driver/Receiver Output Short Circuited to GND.........Continuous
Continuous Power Dissipation (TA = +70°C)
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW
18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)..889mW
20-Pin Plastic DIP (derate 8.00mW/°C above +70°C) ..440mW
Note 1: For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.
Note 2: Input voltage measured with TOUT in high-impedance state, VSHDN or VCC = 0V.
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—MAX220/222/232A/233A/242/243
(VCC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, TA = TMIN to TMAX‚ unless otherwise noted.) (Note 3)
PARAMETER
CONDITIONS
MIN
TYP
±5
±8
2
1.4
MAX
UNITS
RS-232 TRANSMITTERS
Output Voltage Swing
All transmitter outputs loaded with 3k to GND
Input Logic-Low Voltage
Input Logic-High Voltage
1.4
All devices except MAX220
MAX220: VCC = +5.0V
0.8
5
40
VSHDN = 0V, MAX222/MAX242, shutdown,
MAX220
±0.01
±1
VCC = +5.5V, VSHDN = 0V, VOUT = ±15V,
MAX222/MAX242
±0.01
±10
±0.01
±10
Output Leakage Current
VCC = V SHDN = 0V
VOUT = ±15V
MAX220, V OUT = ±12V
V
V
2.4
All except MAX220, normal operation
Logic Pullup/lnput Current
V
μA
μA
±25
Data Rate
200
Transmitter Output Resistance
VCC = V+ = V- = 0V, VOUT = ±2V
300
10M
Output Short-Circuit Current
VOUT = 0V
VOUT = 0V
±7
±22
MAX220
116
kbps
±60
mA
RS-232 RECEIVERS
±30
RS-232 Input Voltage Operating Range
2
MAX220
RS-232 Input Threshold Low
VCC = +5V
RS-232 Input Threshold High
VCC = +5V
±25
All except MAX243 R2IN
0.8
MAX243 R2IN (Note 4)
-3
1.3
V
V
All except MAX243 R2IN
1.8
2.4
MAX243 R2IN (Note 4)
-0.5
-0.1
V
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)
(VCC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, TA = TMIN to TMAX‚ unless otherwise noted.) (Note 3)
PARAMETER
CONDITIONS
All except MAX220/MAX243, VCC = +5V, no
hysteresis in shutdown
RS-232 Input Hysteresis
MIN
TYP
MAX
0.2
0.5
1.0
MAX220
RS-232 Input Resistance
TTL/CMOS Output Voltage Low
TTL/CMOS Output Voltage High
TTL/CMOS Output Short-Circuit Current
TTL/CMOS Output Leakage Current
1
TA = +25°C (MAX220)
3
5
7
3
5
7
0.2
0.4
I OUT = 3.2mA
I OUT = 1.6mA (MAX220)
I OUT = -1.0mA
0.4
3.5
Sourcing VOUT = V GND
-2
-10
10
30
VSHDN = VCC or VEN = VCC (VSHDN = 0V for
MAX222), 0V VOUT VCC
MAX242
EN Input Threshold High
MAX242
2.0
Supply Voltage Range
MAX220
VCC Supply Current (VSHDN = VCC),
Figures 5, 6, 11, 19
3k load
both inputs
V
mA
±10
1.4
0.8
1.4
μA
V
V
5.5
0.5
2
MAX222/MAX232A/MAX233A/
MAX242/MAX243
4
10
MAX220
12
MAX222/MAX232A/MAX233A/
MAX242/MAX243
15
TA = +25°C
0.1
V
mA
10
TA = 0°C to +70°C
2
50
TA = -40°C to +85°C
2
50
TA = -55°C to +125°C
35
100
±1
μA
1.4
0.8
V
Shutdown Supply Current
MAX222/
MAX242
SHDN Input Leakage Current
MAX222/MAX242
SHDN Threshold Low
MAX222/MAX242
SHDN Threshold High
MAX222/MAX242
Transition Slew Rate
CL = 50pF to 2500pF,
MAX222/MAX232A/
RL = 3k to 7k,
MAX233/MAX242/MAX243
VCC = +5V, TA =
+25°C, measured
from +3V to -3V or MAX220
-3V to +3V
t PHLT, Figure 1
MAX222/MAX232A/
MAX233/MAX242/MAX243
t PLHT, Figure 1
MAX222/MAX232A/
MAX233/MAX242/MAX243
MAX220
Transmitter Propagation Delay TLL to
RS-232 (Normal Operation)
k
V
±0.05
4.5
No load
MAX220
Maxim Integrated
VCC - 0.2
Sinking V OUT = VCC
EN Input Threshold Low
V
0.3
MAX243
UNITS
2.0
1.4
6
12
μA
V
30
V/μs
1.5
3
30.0
1.3
3.5
4
10
1.5
3.5
5
10
μs
3
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)
(VCC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, TA = TMIN to TMAX‚ unless otherwise noted.) (Note 3)
PARAMETER
CONDITIONS
TYP
MAX
MAX222/MAX232A/MAX233/
MAX242/MAX243
0.5
1
MAX220
0.6
3
t PLHR, Figure 2
MAX222/MAX232A/MAX233/
MAX242/MAX243
0.6
1
t PHLR, Figure 2
Receiver Propagation Delay RS-232 to
TLL (Normal Operation)
MIN
UNITS
μs
MAX220
0.8
3
Receiver Propagation Delay RS-232 to
TLL (Shutdown)
t PHLS, Figure 2
MAX242
0.5
10
t PHLS, Figure 2
MAX242
2.5
10
Receiver-Output Enable Time
t ER
MAX242, Figure 3
125
500
ns
Receiver-Output Disable Time
tDR
MAX242, Figure 3
160
500
ns
Transmitter-Output Enable Time
(SHDN Goes High)
t ET
MAX222/MAX242, 0.1μF
caps (includes charge-pump
start-up), Figure 4
250
μs
Transmitter-Output Disable Time
(SHDN Goes Low)
tDT
MAX222/MAX242,
0.1μF caps, Figure 4
600
ns
Transmitter + to - Propagation Delay
Difference (Normal Operation)
t PHLT - tPLHT
MAX222/MAX232A/MAX233/
MAX242/MAX243
300
MAX220
2000
MAX222/MAX232A/MAX233/
MAX242/MAX243
100
MAX220
225
Receiver + to - Propagation Delay
Difference (Normal Operation)
t PHLR - tPLHR
μs
ns
ns
Note 3: All units are production tested at hot. Specifications over temperature are guaranteed by design.
Note 4: MAX243 R2OUT is guaranteed to be low when R2IN ≥ 0V or is unconnected.
__________________________________________Typical Operating Characteristics
MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243
2
0
0.1μF
V- LOADED, NO LOAD ON V+
-2
1μF
0.1μF
-4
ALL CAPS
1μF
9
VCC = +5.25V
8
ALL CAPS
0.1μF
7
1μF CAPS
V+
VCC = +4.75V
+5V
+5V
V+
MAX220-03
4
VCC = +5V
NO LOAD ON
TRANSMITTER OUTPUTS
(EXCEPT MAX220, MAX233A)
+10V
V+, V- VOLTAGE (V)
EITHER V+ OR V- LOADED
10
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
6
OUTPUT LOAD CURRENT
FLOWS FROM V+ TO V-
MAX220-02
1μF
8
11
MAX220-01
10
MAX222/MAX242
ON-TIME EXITING SHUTDOWN
AVAILABLE OUTPUT CURRENT
vs. DATA RATE
OUTPUT VOLTAGE vs. LOAD CURRENT
0.1μF CAPS
SHDN
0V
0V
1μF CAPS
6
-6
V+ LOADED, NO LOAD ON V-
-10
0
5
10
15
LOAD CURRENT (mA)
4
0.1μF CAPS
5
-8
20
25
V-
V-
-10V
4
0
10
20
30
40
50
60
500μs/div
DATA RATE (kb/s)
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241
(Voltages referenced to GND.)
VCC ...........................................................................-0.3V to +6V
V+ ................................................................(VCC - 0.3V) to +14V
V- ............................................................................+0.3V to -14V
Input Voltages
TIN ............................................................-0.3V to (VCC + 0.3V)
RIN .....................................................................................±30V
Output Voltages
TOUT ..................................................(V+ + 0.3V) to (V- - 0.3V)
ROUT........................................................-0.3V to (VCC + 0.3V)
Short-Circuit Duration, TOUT to GND ........................Continuous
Continuous Power Dissipation (TA = +70°C)
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW
20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW
24-Pin Narrow Plastic DIP
(derate 13.33mW/°C above +70°C) ..........1.07W
24-Pin Plastic DIP (derate 9.09mW/°C above +70°C)......500mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW
20-Pin Wide SO (derate 10.00mW/°C above +70°C).......800mW
24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW
28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W
44-Pin Plastic FP (derate 11.11mW/°C above +70°C) .....889mW
14-Pin CERDIP (derate 9.09mW/°C above +70°C) ..........727mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C) ........800mW
20-Pin CERDIP (derate 11.11mW/°C above +70°C) ........889mW
24-Pin Narrow CERDIP
(derate 12.50mW/°C above +70°C) ..............1W
24-Pin Sidebraze (derate 20.0mW/°C above +70°C)..........1.6W
28-Pin SSOP (derate 9.52mW/°C above +70°C).............762mW
Operating Temperature Ranges
MAX2 _ _ C _ _......................................................0°C to +70°C
MAX2 _ _ E _ _ ...................................................-40°C to +85°C
MAX2 _ _ M _ _......................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)
20 PDIP (P20M+1) .........................................................+225°C
24 PDIP (P24M-1) ..........................................................+225°C
All other lead(Pb)-free packages...................................+260°C
All other packages containing lead(Pb) ...........................+240°C
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—MAX223/MAX230–MAX241
(MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10%; MAX233/MAX235, V CC = +5V ±5%‚ C1–C4 = 1.0µF;
MAX231/MAX239, VCC = +5V ±10%; V+ = +7.5V to +13.2V; TA = TMIN to TMAX; unless otherwise noted.) (Note 5)
PARAMETER
CONDITIONS
Output Voltage Swing
All transmitter outputs loaded with 3kΩ to ground
VCC Supply Current
No load,
TA = +25°C
V+ Supply Current
MIN
TYP
±5.0
±7.3
5
10
MAX223/230/234–238/240/241
7
15
MAX231/239
0.4
1
MAX231
1.8
5
MAX239
5
15
MAX223
15
50
MAX230/235/236/240/241
1
10
TA = +25°C
Input Logic-Low Voltage
TIN, EN, SHDN (MAX233); EN, SHDN (MAX230/235–241)
0.8
TIN
2.0
Input Logic-High Voltage
EN, SHDN (MAX223);
EN, SHDN (MAX230/235/236/240/241)
2.4
Logic Pullup Current
VTIN = 0V
Maxim Integrated
mA
mA
µA
V
V
1.5
-30
UNITS
V
MAX232/233
Shutdown Supply Current
Receiver Input Voltage
Operating Range
MAX
200
µA
+30
V
5
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued)
(MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10%; MAX233/MAX235, V CC = +5V ±5%‚ C1–C4 = 1.0µF;
MAX231/MAX239, VCC = +5V ±10%; V+ = +7.5V to +13.2V; TA = TMIN to TMAX; unless otherwise noted.) (Note 5)
PARAMETER
RS-232 Input Logic-Low Voltage
RS-232 Input Logic-High Voltage
CONDITIONS
TA = +25°C,
VCC = +5V
TA = +25°C,
VCC = +5V
MIN
TYP
Normal operation
VSHDN = +5V (MAX223)
VSHDN = 0V (MAX235/236/240/241)
0.8
1.2
Shutdown (MAX223)
VSHDN = 0V,
VEN = +5V (R4IN, R5IN)
0.6
1.5
Normal operation
VSHDN = 5V (MAX223)
VSHDN = 0V (MAX235/236/240/241)
1.7
Shutdown (MAX223)
VSHDN = 0V,
VEN = +5V (R4IN‚ R5IN)
1.5
2.4
0.2
0.5
1.0
V
3
5
7
kΩ
0.4
V
RS-232 Input Resistance
TA = +25°C, VCC = +5V
TTL/CMOS Output Voltage Low
IOUT = 1.6mA (MAX231/232/233, IOUT = 3.2mA)
TTL/CMOS Output Voltage High
IOUT = -1mA
TTL/CMOS Output Leakage Current
0V ≤ ROUT ≤ VCC; VEN = 0V (MAX223);
VEN = VCC (MAX235–241)
Receiver Output Enable Time
Normal
operation
MAX223
600
MAX235/236/239/240/241
400
Receiver Output Disable Time
Normal
operation
MAX223
900
MAX235/236/239/240/241
250
Propagation Delay
Normal operation
RS-232 IN to
TTL/CMOS OUT, VSHDN = 0V
CL = 150pF
(MAX223)
Transmitter Output Short-Circuit
Current
3.5
VCC - 0.4
±0.05
V
±10
ns
10
tPHLS
4
40
tPLHS
6
40
5.1
30
3
µA
ns
0.5
MAX223/MAX230/MAX234–241, TA = +25°C, VCC = +5V,
RL = 3kΩ to 7kΩ‚ CL = 50pF to 2500pF, measured from
+3V to -3V or -3V to +3V
µs
V/µs
MAX231/MAX232/MAX233, TA = +25°C, VCC = +5V,
RL = 3kΩ to 7kΩ, CL = 50pF to 2500pF, measured from
+3V to -3V or -3V to +3V
VCC = V+ = V- = 0V, VOUT = ±2V
2.4
V
VCC = +5V, no hysteresis in shutdown
Transmitter Output Resistance
UNITS
V
RS-232 Input Hysteresis
Transition Region Slew Rate
MAX
4
30
Ω
300
±10
mA
mA
Note 5: All units are production tested at hot except for the MAX240, which is production tested at TA = +25°C. Specifications over
temperature are guaranteed by design.
6
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
__________________________________________Typical Operating Characteristics
MAX223/MAX230–MAX241
TRANSMITTER OUTPUT VOLTAGE (VOH)
vs. LOAD CAPACITANCE AT
DIFFERENT DATA RATES
2 TRANSMITTERS
LOADED
7.2
6.5
4.5
160kb/s
80kb/s
20kb/s
6.6
TA = +25°C
VCC = +5V
3 TRANSMITTERS LOADED
RL = 3kΩ
C1–C4 = 1μF
6.4
6.2
6.0
0
5.5
5.0
500
1000
1500
2 TRANSMITTERS
LOADED
9.0
8.0
7.0
3 TRANSMITTERS
LOADED
4 TRANSMITTERS
LOADED
6.0
5.0
4.0
2000
0
2500
500
1000
1500
2000
2500
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT
VOLTAGE (VOL) vs. VCC
TRANSMITTER OUTPUT VOLTAGE (VOL)
vs. LOAD CAPACITANCE AT
DIFFERENT DATA RATES
TRANSMITTER OUTPUT VOLTAGE (V+, V-)
vs. LOAD CURRENT
-7.0
TA = +25°C
VCC = +5V
3 TRANSMITTERS LOADED
RL = 3kΩ
C1–C4 = 1μF
-6.2
-6.4
VOL (V)
-6.6
-7.5
1 TRANSMITTER
LOADED
2 TRANSMITTERS
LOADED
-7.0
8
6
5.0
VCC (V)
5.5
-2
V+ LOADED,
NO LOAD
ON V-
-8
-7.6
4.5
0
-6
-7.4
-9.0
2
-4
-7.2
3 TRANSMITTERS
LOADED
TA = +25°C
VCC = +5V
C1–C4 = 1μF
V- LOADED,
V+ AND VNO LOAD
EQUALLY
ON V+
LOADED
4
160kb/s
80kb/s
20kb/s
-6.8
10
MAX220-09
-6.0
MAX220-08
-6.5
TA = +25°C
C1–C4 = 1μF
TRANSMITTER
LOADS =
3kΩ || 2500pF
V+, V- (V)
4 TRANSMITTERS
LOADED
-8.5
TA = +25°C
VCC = +5V
LOADED, RL = 3kΩ
C1–C4 = 1μF
VCC (V)
-6.0
-8.0
6.8
SLEW RATE (V/μs)
3 TRANSMITTERS
LOADED
TA = +25°C
C1–C4 = 1μF
TRANSMITTER
4 TRANSMITTERS LOADS =
3kΩ || 2500pF
LOADED
7.5
7.0
VOL (V)
VOH (V)
1 TRANSMITTER
LOADED
1 TRANSMITTER LOADED
11.0
10.0
7.0
MAX220-07
VOH (V)
8.0
12.0
MAX220-05
7.4
MAX220-04
8.5
TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE
MAX220-06
TRANSMITTER OUTPUT
VOLTAGE (VOH) vs. VCC
ALL TRANSMITTERS UNLOADED
-10
0
500
1000
1500
2500
2000
0
LOAD CAPACITANCE (pF)
5
10 15 20 25 30 35 40 45 50
CURRENT (mA)
V+, V- WHEN EXITING SHUTDOWN
(1μF CAPACITORS)
MAX220-13
V+
O
V-
VSHDN*
500ms/div
*SHUTDOWN POLARITY IS REVERSED
Maxim Integrated
7
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249
(Voltages referenced to GND.)
Supply Voltage (VCC) ...............................................-0.3V to +6V
Input Voltages
TIN‚ ENA, ENB, ENR, ENT, ENRA,
ENRB, ENTA, ENTB..................................-0.3V to (VCC + 0.3V)
RIN .....................................................................................±25V
TOUT (Note 6)....................................................................±15V
ROUT........................................................-0.3V to (VCC + 0.3V)
Short Circuit Duration (one output at a time)
TOUT to GND ...........................................................Continuous
ROUT to GND...........................................................Continuous
Continuous Power Dissipation (TA = +70°C)
28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W
40-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ...611mW
44-Pin PLCC (derate 13.33mW/°C above +70°C) ...........1.07W
Operating Temperature Ranges
MAX225C_ _, MAX24_C_ _ ..................................0°C to +70°C
MAX225E_ _, MAX24_E_ _ ...............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering,10s)) .................................+300°C
Soldering Temperature (reflow)
40 PDIP (P40M-2) ..........................................................+225°C
All other lead(Pb)-free packages...................................+260°C
All other packages containing lead(Pb) ........................+240°C
Note 6: Input voltage measured with transmitter output in a high-impedance state, shutdown, or VCC = 0V.
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—MAX225/MAX244–MAX249
(MAX225, VCC = +5.0V ±5%; MAX244–MAX249, VCC = +5.0V ±10%, external capacitors C1–C4 = 1µF; TA = TMIN to TMAX; unless
otherwise noted.) (Note 7)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
1.4
0.8
V
RS-232 TRANSMITTERS
Input Logic-Low Voltage
Input Logic-High Voltage
2
Normal operation
Logic Pullup/lnput Current
Tables 1a–1d
Data Rate
Tables 1a–1d, normal operation
Output Voltage Swing
All transmitter outputs loaded with 3kΩ to GND
Output Leakage Current (Shutdown)
Tables 1a–1d
Shutdown
±5
1.4
V
10
50
±0.01
±1
120
64
±7.5
µA
kbps
V
VENA, VENB, VENT, VENTA,
VENTB = VCC, VOUT = ±15V
±0.01
±25
VCC = 0V,
VOUT = ±15V
±0.01
±25
µA
Transmitter Output Resistance
VCC = V+ = V- = 0V, VOUT = ±2V (Note 8)
300
10M
Ω
Output Short-Circuit Current
VOUT = 0V
±7
±30
mA
RS-232 RECEIVERS
RS-232 Input Voltage Operating Range
±25
RS-232 Input Logic-Low Voltage
VCC = +5V
RS-232 Input Logic-High Voltage
VCC = +5V
RS-232 Input Hysteresis
VCC = +5V
RS-232 Input Resistance
0.2
3
1.3
2.4
V
0.5
1.0
V
5
7
kΩ
0.2
0.4
V
IOUT = 3.2mA
TTL/CMOS Output Voltage High
IOUT = -1.0mA
3.5
VCC - 0.2
Sourcing VOUT = VGND
-2
-10
Sinking VOUT = VCC
10
30
TTL/CMOS Output Leakage Current
Normal operation, outputs disabled,
Tables 1a–1d, 0V ≤ VOUT ≤ VCC, VENR_ = VCC
V
1.8
TTL/CMOS Output Voltage Low
TTL/CMOS Output Short-Circuit Current
8
0.8
V
±0.05
V
mA
±0.10
µA
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249 (continued)
(MAX225, VCC = +5.0V ±5%; MAX244–MAX249, VCC = +5.0V ±10%, external capacitors C1–C4 = 1µF; TA = TMIN to TMAX; unless
otherwise noted.) (Note 7)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLY AND CONTROL LOGIC
Supply Voltage Range
No load
VCC Supply Current
(Normal Operation)
Shutdown Supply Current
3kΩ loads on
all outputs
MAX225
4.75
5.25
MAX244–MAX249
4.5
5.5
MAX225
10
20
MAX244–MAX249
11
30
MAX225
40
MAX244–MAX249
57
TA = +25°C
8
TA = TMIN to TMAX
50
Leakage current
Control Input
25
±1
Logic-low voltage
Logic-high voltage
1.4
0.8
V
mA
µA
µA
V
2.4
1.4
5
10
30
tPHLT, Figure 1
1.3
3.5
tPLHT, Figure 1
1.5
3.5
tPHLR, Figure 2
0.6
1.5
tPLHR, Figure 2
0.6
1.5
tPHLS, Figure 2
0.6
10
tPLHS, Figure 2
3.0
10
Transmitter + to - Propagation
Delay Difference (Normal Operation)
tPHLT - tPLHT
350
ns
Receiver + to - Propagation
Delay Difference (Normal Operation)
tPHLR - tPLHR
350
ns
Receiver-Output Enable Time
tER, Figure 3
100
500
ns
Receiver-Output Disable Time
tDR, Figure 3
100
500
ns
AC CHARACTERISTICS
Transition Slew Rate
Transmitter Propagation Delay
TLL to RS-232 (Normal Operation)
Receiver Propagation Delay
TLL to RS-232 (Normal Operation)
Receiver Propagation Delay
TLL to RS-232 (Low-Power Mode)
Transmitter Enable Time
Transmitter Disable Time
CL = 50pF to 2500pF, RL = 3kΩ to 7kΩ, VCC = +5V,
TA = +25°C, measured from +3V to -3V or -3V to +3V
V/µs
µs
µs
µs
tET
tDT, Figure 4
MAX246–MAX249
(excludes charge-pump startup)
5
µs
MAX225/MAX245–MAX249
(includes charge-pump startup)
10
ms
100
ns
Note 7: All units production tested at hot. Specifications over temperature are guaranteed by design.
Note 8: The 300Ω minimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or VCC =
0V is 10MΩ as is implied by the leakage specification.
Maxim Integrated
9
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
__________________________________________Typical Operating Characteristics
MAX225/MAX244–MAX249
8
V+ AND V- LOADED
EXTERNAL POWER SUPPLY
1μF CAPACITORS
12
10
40kb/s DATA RATE
8 TRANSMITTERS
LOADED WITH 3kΩ
8
6
4
VCC = +5V
EXTERNAL CHARGE PUMP
1μF CAPACITORS
8 TRANSMITTERS
DRIVING 5kΩ AND
2000pF AT 20kb/s
2
0
-2
EITHER V+ OR
V- LOADED
2
3
LOAD CAPACITANCE (nF)
4
5
40kb/s
7.0
60kb/s
6.0
100kb/s
V+ AND V- LOADED
200kb/s
5.5
V+ LOADED
-10
1
7.5
6.5
-8
0
8.0
V- LOADED
-4
-6
2
VCC = +5V WITH ALL TRANSMITTERS DRIVEN
LOADED WITH 5kΩ
10kb/s
20kb/s
8.5
V+, V- (V)
OUTPUT VOLTAGE (V)
6
14
9.0
MAX220-11
VCC = +5V
4
10
10
MAX220-10
TRANSMITTER SLEW RATE (V/μs)
18
16
TRANSMITTER OUTPUT VOLTAGE (V+, V-)
vs. LOAD CAPACITANCE AT
DIFFERENT DATA RATES
OUTPUT VOLTAGE
vs. LOAD CURRENT FOR V+ AND V-
MAX220-12
TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE
0
5
10
15
20
25
LOAD CURRENT (mA)
30
ALL CAPACITIORS 1μF
5.0
35
0
1
2
3
4
5
LOAD CAPACITANCE (nF)
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
Test Circuits/Timing Diagrams
+3V
0V*
50%
50%
50%
50%
INPUT
+3V
INPUT
0V
VCC
OUTPUT
GND
V+
0V
V-
OUTPUT
tPLHT
tPLHR
tPLHS
tPHLR
tPHLS
tPHLT
*EXCEPT FOR R2 ON THE MAX243
WHERE -3V IS USED.
Figure 1. Transmitter Propagation-Delay Timing
Figure 2. Receiver Propagation-Delay Timing
EN
RX OUT
RX IN
1kΩ
RX
VCC - 2V
SHDN
+3V
a) TEST CIRCUIT
0V
150pF
EN INPUT
OUTPUT DISABLE TIME (tDT)
+3V
0V
V+
+5V
EN
OUTPUT ENABLE TIME (tER)
0V
-5V
+3.5V
V-
RECEIVER
OUTPUTS
+0.8V
a) TIMING DIAGRAM
b) ENABLE TIMING
+3V
EN INPUT
EN
0V
1 OR 0
TX
OUTPUT DISABLE TIME (tDR)
VOH
50pF
VOH - 0.5V
RECEIVER
OUTPUTS
VOL
3kΩ
VCC - 2V
VOL + 0.5V
b) TEST CIRCUIT
c) DISABLE TIMING
Figure 3. Receiver-Output Enable and Disable Timing
Maxim Integrated
Figure 4. Transmitter-Output Disable Timing
11
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
Control Pin Configuration Tables
Table 1a. MAX245 Control Pin Configurations
ENT
ENR
0
0
Normal Operation
All Active
All Active
0
1
Normal Operation
All Active
All High-Z
1
0
Shutdown
All High-Z
All Low-Power Receive Mode
1
1
Shutdown
All High-Z
All High-Z
OPERATION STATUS
TRANSMITTERS
RECEIVERS
Table 1b. MAX245 Control Pin Configurations
TRANSMITTERS
RECEIVERS
OPERATION
STATUS
TA1–TA4
TB1–TB4
0
Normal Operation
All Active
All Active
All Active
All Active
0
1
Normal Operation
All Active
All Active
RA1–RA4 High-Z,
RA5 Active
RB1–RB4 High-Z,
RB5 Active
1
0
Shutdown
All High-Z
All High-Z
All Low-Power
Receive Mode
All Low-Power
Receive Mode
1
1
Shutdown
All High-Z
All High-Z
RA1–RA4 High-Z,
RA5 Low-Power
Receive Mode
RB1–RB4 High-Z,
RB5 Low-Power
Receive Mode
ENT
ENR
0
RA1–RA5
RB1–RB5
Table 1c. MAX246 Control Pin Configurations
12
ENA
ENB
0
0
0
OPERATION
STATUS
TRANSMITTERS
RECEIVERS
TA1–TA4
TB1–TB4
RA1–RA5
RB1–RB5
Normal Operation
All Active
All Active
All Active
All Active
1
Normal Operation
All Active
All High-Z
All Active
RB1–RB4 High-Z,
RB5 Active
1
0
Shutdown
All High-Z
All Active
RA1–RA4 High-Z,
RA5 Active
All Active
1
1
Shutdown
All High-Z
All High-Z
RA1–RA4 High-Z,
RA5 Low-Power
Receive Mode
RB1–RB4 High-Z,
RA5 Low-Power
Receive Mode
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
Table 1d. MAX247/MAX248/MAX249 Control Pin Configurations
TRANSMITTERS
ENTA ENTB ENRA ENRB
OPERATION
STATUS
RECEIVERS
MAX247
TA1–TA4
TB1–TB4
RA1–RA4
RB1–RB5
MAX248
TA1–TA4
TB1–TB4
RA1–RA4
RB1–RB4
MAX249
TA1–TA3
TB1–TB3
RA1–RA5
RB1–RB5
0
0
0
0
Normal Operation
All Active
All Active
All Active
All Active
0
0
0
1
Normal Operation
All Active
All Active
All Active
All High-Z, except
RB5 stays active on
MAX247
0
0
1
0
Normal Operation
All Active
All Active
All High-Z
All Active
0
0
1
1
Normal Operation
All Active
All Active
All High-Z
All High-Z, except
RB5 stays active on
MAX247
0
1
0
0
Normal Operation
All Active
All High-Z
All Active
All Active
0
1
0
1
Normal Operation
All Active
All High-Z
All Active
All High-Z, except
RB5 stays active on
MAX247
0
1
1
0
Normal Operation
All Active
All High-Z
All High-Z
All Active
0
1
1
1
Normal Operation
All Active
All High-Z
All High-Z
All High-Z, except
RB5 stays active on
MAX247
1
0
0
0
Normal Operation
All High-Z
All Active
All Active
All Active
1
0
0
1
Normal Operation
All High-Z
All Active
All Active
All High-Z, except
RB5 stays active on
MAX247
1
0
1
0
Normal Operation
All High-Z
All Active
All High-Z
All Active
1
0
1
1
Normal Operation
All High-Z
All Active
All High-Z
All High-Z, except
RB5 stays active on
MAX247
1
1
0
0
Shutdown
All High-Z
All High-Z
Low-Power
Receive Mode
Low-Power
Receive Mode
1
1
0
1
Shutdown
All High-Z
All High-Z
Low-Power
Receive Mode
All High-Z, except
RB5 stays active on
MAX247
1
1
1
0
Shutdown
All High-Z
All High-Z
All High-Z
Low-Power
Receive Mode
1
1
1
1
Shutdown
All High-Z
All High-Z
All High-Z
All High-Z, except
RB5 stays active on
MAX247
Maxim Integrated
13
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
_______________Detailed Description
The MAX220–MAX249 contain four sections: dual
charge-pump DC-DC voltage converters, RS-232 drivers, RS-232 receivers, and receiver and transmitter
enable control inputs.
Dual Charge-Pump Voltage Converter
The MAX220–MAX249 have two internal charge-pumps
that convert +5V to ±10V (unloaded) for RS-232 driver
operation. The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the V+ output. The
second converter uses capacitor C2 to invert +10V to
-10V on C4 at the V- output.
A small amount of power may be drawn from the +10V
(V+) and -10V (V-) outputs to power external circuitry
(see the Typical Operating Characteristics section),
except on the MAX225 and MAX245–MAX247, where
these pins are not available. V+ and V- are not regulated,
so the output voltage drops with increasing load current.
Do not load V+ and V- to a point that violates the minimum ±5V EIA/TIA-232E driver output voltage when
sourcing current from V+ and V- to external circuitry.
When using the shutdown feature in the MAX222,
MAX225, MAX230, MAX235, MAX236, MAX240,
MAX241, and MAX245–MAX249, avoid using V+ and Vto power external circuitry. When these parts are shut
down, V- falls to 0V, and V+ falls to +5V. For applications where a +10V external supply is applied to the V+
pin (instead of using the internal charge pump to generate +10V), the C1 capacitor must not be installed and
the SHDN pin must be connected to V CC . This is
because V+ is internally connected to VCC in shutdown
mode.
RS-232 Drivers
The typical driver output voltage swing is ±8V when
loaded with a nominal 5kΩ RS-232 receiver and VCC =
+5V. Output swing is guaranteed to meet the EIA/TIA232E and V.28 specification, which calls for ±5V minimum driver output levels under worst-case conditions.
These include a minimum 3kΩ load, VCC = +4.5V, and
maximum operating temperature. Unloaded driver output voltage ranges from (V+ -1.3V) to (V- +0.5V).
Input thresholds are both TTL and CMOS compatible.
The inputs of unused drivers can be left unconnected
since 400kΩ input pullup resistors to VCC are built in
(except for the MAX220). The pullup resistors force the
outputs of unused drivers low because all drivers invert.
The internal input pullup resistors typically source 12µA,
except in shutdown mode where the pullups are disabled. Driver outputs turn off and enter a high-impedance state—where leakage current is typically
microamperes (maximum 25µA)—when in shutdown
14
mode, in three-state mode, or when device power is
removed. Outputs can be driven to ±15V. The powersupply current typically drops to 8µA in shutdown mode.
The MAX220 does not have pullup resistors to force the
outputs of the unused drivers low. Connect unused
inputs to GND or VCC.
The MAX239 has a receiver three-state control line, and
the MAX223, MAX225, MAX235, MAX236, MAX240,
and MAX241 have both a receiver three-state control
line and a low-power shutdown control. Table 2 shows
the effects of the shutdown control and receiver threestate control on the receiver outputs.
The receiver TTL/CMOS outputs are in a high-impedance, three-state mode whenever the three-state enable
line is high (for the MAX225/MAX235/MAX236/MAX239–
MAX241), and are also high-impedance whenever the
shutdown control line is high.
When in low-power shutdown mode, the driver outputs
are turned off and their leakage current is less than 1µA
with the driver output pulled to ground. The driver output
leakage remains less than 1µA, even if the transmitter
output is backdriven between 0V and (VCC + 6V). Below
-0.5V, the transmitter is diode clamped to ground with
1kΩ series impedance. The transmitter is also zener
clamped to approximately V CC + 6V, with a series
impedance of 1kΩ.
The driver output slew rate is limited to less than 30V/µs
as required by the EIA/TIA-232E and V.28 specifications. Typical slew rates are 24V/µs unloaded and
10V/µs loaded with 3Ω and 2500pF.
RS-232 Receivers
EIA/TIA-232E and V.28 specifications define a voltage
level greater than 3V as a logic 0, so all receivers invert.
Input thresholds are set at 0.8V and 2.4V, so receivers
respond to TTL level inputs as well as EIA/TIA-232E and
V.28 levels.
The receiver inputs withstand an input overvoltage up
to ±25V and provide input terminating resistors with
Table 2. Three-State Control of Receivers
PART
SHDN SHDN
EN
EN(R)
RECEIVERS
MAX223
__
Low
High
High
X
Low
High
__
High Impedance
Active
High Impedance
MAX225
__
__
__
Low
High
High Impedance
Active
MAX235
MAX236
MAX240
Low
Low
High
__
__
Low
High
X
High Impedance
Active
High Impedance
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
nominal 5kΩ values. The receivers implement Type 1
interpretation of the fault conditions of V.28 and
EIA/TIA-232E.
The receiver input hysteresis is typically 0.5V with a
guaranteed minimum of 0.2V. This produces clear output transitions with slow-moving input signals, even
with moderate amounts of noise and ringing. The
receiver propagation delay is typically 600ns and is
independent of input swing direction.
Low-Power Receive Mode
The low-power receive mode feature of the MAX223,
MAX242, and MAX245–MAX249 puts the IC into shutdown mode but still allows it to receive information. This
is important for applications where systems are periodically awakened to look for activity. Using low-power
receive mode, the system can still receive a signal that
will activate it on command and prepare it for communication at faster data rates. This operation conserves
system power.
Negative Threshold—MAX243
The MAX243 is pin compatible with the MAX232A, differing only in that RS-232 cable fault protection is removed
on one of the two receiver inputs. This means that control
lines such as CTS and RTS can either be driven or left
unconnected without interrupting communication.
Different cables are not needed to interface with different
pieces of equipment.
The input threshold of the receiver without cable fault
protection is -0.8V rather than +1.4V. Its output goes
positive only if the input is connected to a control line
that is actively driven negative. If not driven, it defaults
to the 0 or “OK to send” state. Normally‚ the MAX243’s
other receiver (+1.4V threshold) is used for the data line
(TD or RD)‚ while the negative threshold receiver is connected to the control line (DTR‚ DTS‚ CTS‚ RTS, etc.).
Other members of the RS-232 family implement the
optional cable fault protection as specified by EIA/TIA232E specifications. This means a receiver output goes
high whenever its input is driven negative‚ left unconnected‚ or shorted to ground. The high output tells the
serial communications IC to stop sending data. To
avoid this‚ the control lines must either be driven or
connected with jumpers to an appropriate positive voltage level.
Maxim Integrated
Shutdown—MAX222–MAX242
On the MAX222‚ MAX235‚ MAX236‚ MAX240‚ and
MAX241‚ all receivers are disabled during shutdown.
On the MAX223 and MAX242‚ two receivers continue to
operate in a reduced power mode when the chip is in
shutdown. Under these conditions‚ the propagation
delay increases to about 2.5µs for a high-to-low input
transition. When in shutdown, the receiver acts as a
CMOS inverter with no hysteresis. The MAX223 and
MAX242 also have a receiver output enable input (EN
for the MAX242 and EN for the MAX223) that allows
receiver output control independent of SHDN (SHDN
for MAX241). With all other devices‚ SHDN (SHDN for
MAX241) also disables the receiver outputs.
The MAX225 provides five transmitters and five
receivers‚ while the MAX245 provides ten receivers and
eight transmitters. Both devices have separate receiver
and transmitter-enable controls. The charge pumps
turn off and the devices shut down when a logic high is
applied to the ENT input. In this state, the supply current drops to less than 25µA and the receivers continue
to operate in a low-power receive mode. Driver outputs
enter a high-impedance state (three-state mode). On
the MAX225‚ all five receivers are controlled by the
ENR input. On the MAX245‚ eight of the receiver outputs are controlled by the ENR input‚ while the remaining two receivers (RA5 and RB5) are always active.
RA1–RA4 and RB1–RB4 are put in a three-state mode
when ENR is a logic high.
Receiver and Transmitter Enable
Control Inputs
The MAX225 and MAX245–MAX249 feature transmitter
and receiver enable controls.
The receivers have three modes of operation: full-speed
receive (normal active)‚ three-state (disabled)‚ and lowpower receive (enabled receivers continue to function
at lower data rates). The receiver enable inputs control
the full-speed receive and three-state modes. The
transmitters have two modes of operation: full-speed
transmit (normal active) and three-state (disabled). The
transmitter enable inputs also control the shutdown
mode. The device enters shutdown mode when all
transmitters are disabled. Enabled receivers function in
the low-power receive mode when in shutdown.
15
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
Tables 1a–1d define the control states. The MAX244
has no control pins and is not included in these tables.
The MAX246 has ten receivers and eight drivers with
two control pins, each controlling one side of the
device. A logic high at the A-side control input (ENA)
causes the four A-side receivers and drivers to go into
a three-state mode. Similarly, the B-side control input
(ENB) causes the four B-side drivers and receivers to
go into a three-state mode. As in the MAX245, one Aside and one B-side receiver (RA5 and RB5) remain
active at all times. The entire device is put into shutdown mode when both the A and B sides are disabled
(ENA = ENB = +5V).
The MAX247 provides nine receivers and eight drivers
with four control pins. The ENRA and ENRB receiver
enable inputs each control four receiver outputs. The
ENTA and ENTB transmitter enable inputs each control
four drivers. The ninth receiver (RB5) is always active.
The device enters shutdown mode with a logic high on
both ENTA and ENTB.
The MAX248 provides eight receivers and eight drivers
with four control pins. The ENRA and ENRB receiver
enable inputs each control four receiver outputs. The
ENTA and ENTB transmitter enable inputs control four
drivers each. This part does not have an always-active
receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on
both ENTA and ENTB.
16
The MAX249 provides ten receivers and six drivers with
four control pins. The ENRA and ENRB receiver enable
inputs each control five receiver outputs. The ENTA
and ENTB transmitter enable inputs control three drivers each. There is no always-active receiver. The
device enters shutdown mode and transmitters go into
a three-state mode with a logic high on both ENTA and
ENTB. In shutdown mode, active receivers operate in a
low-power receive mode at data rates up to 20kb/s.
__________Applications Information
Figures 5 through 25 show pin configurations and typical operating circuits. In applications that are sensitive
to power-supply noise, VCC should be decoupled to
ground with a capacitor of the same value as C1 and
C2 connected as close as possible to the device.
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V INPUT
C3
TOP VIEW
C5
C1+ 1
+
V+ 2
C2+ 4
C2- 5
C1
15 GND
C1- 3
14 T1OUT
MAX220
MAX232
MAX232A
V- 6
C2
13 R1IN
+5V
400kΩ
11 T1IN
12 R1OUT
11 T1IN
T2OUT 7
TTL/CMOS
INPUTS
10 T2IN
9
R2IN 8
16
VCC
C1+
+5V TO +10V
3 C1VOLTAGE DOUBLER
4
C2+
+10V TO -10V
5 C2- VOLTAGE INVERTER
1
16 VCC
R2OUT
DIP/SO
V-
6
-10V
C4
T1OUT 14
+5V
RS-232
OUTPUTS
400kΩ
10 T2IN
T2OUT 7
12 R1OUT
R1IN 13
TTL/CMOS
OUTPUTS
CAPACITANCE (μF)
DEVICE
C1 C2 C3 C4 C5
MAX220 0.047 0.33 0.33 0.33 0.33
MAX232
1.0 1.0 1.0 1.0 1.0
MAX232A 0.1 0.1 0.1 0.1 0.1
V+ 2 +10V
RS-232
INPUTS
5kΩ
R2IN 8
9 R2OUT
5kΩ
GND
15
Figure 5. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit
+5V INPUT C3
ALL CAPACITORS = 0.1μF
TOP VIEW
C5
17
VCC
3 +10V
C1+
+5V TO +10V
V+
4 C1- VOLTAGE DOUBLER
5
C2+
7 -10V
+10V TO -10V
V6 C2C4
VOLTAGE INVERTER
2
(N.C.) EN 1
(N.C.) EN 1
+
18 SHDN
19 VCC
18 GND
17 VCC
V+ 3
V+ 3
16 GND
C1- 4
15 T1OUT
C2+ 5
14 R1IN
C2- 6
C2+ 5
C2- 6
MAX222
MAX242
13 R1OUT
V- 7
12 T1IN
T2OUT 8
11 T2IN
R2IN 9
10 R2OUT
DIP/SO
C1
20 SHDN
C1+ 2
C1+ 2
C1- 4
+
C2
16 N.C.
+5V
400kΩ
12 T1IN
15 R1IN
+5V
17 T1OUT
MAX222
MAX242
V- 7
14 R1OUT
T2OUT 8
13 N.C.
R2IN 9
12 T1IN
R2OUT 10
11 T2IN
SSOP
TTL/CMOS
INPUTS
400kΩ
11 T2IN
(EXCEPT MAX220)
T1OUT 15
T2OUT 8
13 R1OUT
R1IN 14
TTL/CMOS
OUTPUTS
RS-232
INPUTS
5kΩ
R2IN 9
10 R2OUT
1 (N.C.) EN
( ) ARE FOR MAX222 ONLY.
PIN NUMBERS IN TYPICAL OPERATING CIRCUIT ARE FOR DIP/SO PACKAGES ONLY.
RS-232
OUTPUTS
(EXCEPT MAX220)
5kΩ
SHDN
GND
18
16
Figure 6. MAX222/MAX242 Pin Configurations and Typical Operating Circuit
Maxim Integrated
17
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V
TOP VIEW
0.1μF
28
+5V
VCC
27
VCC
400kΩ
+
ENR 1
28 VCC
ENR 2
27 VCC
T1IN 3
26 ENT
T2IN 4
R1OUT 5
24 T4IN
23 T5IN
R3OUT 7
22 R4OUT
21 R5OUT
8
R2IN 9
20 R5IN
R1IN 10
19 R4IN
T1OUT 11
18 T3OUT
T2OUT 12
17 T4OUT
GND 13
16 T5OUT
GND 14
15 T5OUT
SO
T1OUT
+5V
11
400kΩ
T2IN
4
T2OUT
+5V
25 T3IN
MAX225
R2OUT 6
R3IN
T1IN
3
12
400kΩ
T3IN
25
T3OUT
+5V
18
400kΩ
T4IN
24
T4OUT
+5V
17
400kΩ
T5OUT
T5IN
23
16
ENT
26
T5OUT
R1OUT
5
R1IN
15
10
5kΩ
R2OUT
6
R2IN
9
5kΩ
R3OUT
7
MAX225 FUNCTIONAL DESCRIPTION
5 RECEIVERS
5 TRANSMITTERS
2 CONTROL PINS
1 RECEIVER ENABLE (ENR)
1 TRANSMITTER ENABLE (ENT)
R3IN
8
5kΩ
R4OUT
22
R4IN
19
5kΩ
R5OUT
21
R5IN
20
5kΩ
PINS (ENR, GND, VCC, T5OUT) ARE INTERNALLY CONNECTED.
CONNECT EITHER OR BOTH EXTERNALLY. T5OUT IS A SINGLE DRIVER.
1
2
ENR
ENR
GND
13
GND
14
Figure 7. MAX225 Pin Configuration and Typical Operating Circuit
18
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V INPUT
TOP VIEW
1.0μF
12
11
VCC
+5V TO +10V
VOLTAGE DOUBLER
C1+
1.0μF
14
C115
C2+
1.0μF
16 C2-
1.0μF
V+
+10V TO -10V
VOLTAGE INVERTER
V-
13
17
1.0μF
+5V
400kΩ
7 T1IN
T1
+
T3OUT 1
28 T4OUT
T1OUT 2
27 R3IN
T2OUT 3
25 SHDN (SHDN)
R2OUT 5
T2IN 6
+5V
400kΩ
6 T2IN
26 R3OUT
R2IN 4
24 EN (EN)
MAX223
MAX241
GND 10
19 R5OUT*
VCC 11
18 R5IN*
C1+ 12
17 V-
V+ 13
16 C2-
C1- 14
15 C2+
Wide SO/
SSOP
RS-232
OUTPUTS
T3
T3OUT 1
+5V
400kΩ
21 T4IN
20 T3IN
T2OUT 3
400kΩ
20 T3IN
23 R4IN*
R1IN 9
T2
+5V
TTL/CMOS
INPUTS
22 R4OUT*
T1IN 7
R1OUT 8
T1OUT 2
21 T4IN
8 R1OUT
T4
R1
T4OUT 28
R1IN 9
5kΩ
5 R2OUT
R2
R2IN 4
5kΩ
LOGIC
OUTPUTS
26 R3OUT
R3
R3IN 27
5kΩ
22 R4OUT
R4
RS-232
INPUTS
R4IN 23
5kΩ
19 R5OUT
R5
*R4 AND R5 IN MAX223 REMAIN ACTIVE IN SHUTDOWN.
NOTE: PIN LABELS IN ( ) ARE FOR MAX241.
24 EN (EN)
GND
R5IN 18
5kΩ
SHDN 25
(SHDN)
10
Figure 8. MAX223/MAX241 Pin Configuration and Typical Operating Circuit
Maxim Integrated
19
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V INPUT
1.0μF
TOP VIEW
1.0μF
T3OUT
+
20 T4OUT
1
T1OUT 2
19 T5IN
T2OUT 3
18 N.C.
T2IN 4
T1IN 5
1.0μF
11
+10V TO -10V
C2+
12
C2- VOLTAGE INVERTER
15 T4IN
VCC 7
14 T3IN
C1+ 8
13 V-
V+ 9
12 C2-
C1- 10
11 C2+
13
V-
1.0μF
400kΩ
5 T1IN
T1OUT 2
T1
+5V
16 T5OUT
GND 6
1.0μF
9
+5V
17 SHDN
MAX230
7
VCC
V+
+5V TO +10V
VOLTAGE DOUBLER
8 C1+
10 C1-
400kΩ
4 T2IN
T2OUT 3
T2
+5V
400kΩ
TTL/CMOS
INPUTS
14 T3IN
T3OUT 1
T3
+5V
RS-232
OUTPUTS
400kΩ
15 T4IN
+5V
T4OUT 20
T4
400kΩ
DIP/SO
19 T5IN
T5OUT 16
T5
N.C. x 18
17
GND
SHDN
6
Figure 9. MAX230 Pin Configuration and Typical Operating Circuit
+5V INPUT
TOP VIEW
+7.5V TO +12V
1.0μF
13 (15)
1
2
1.0μF
C+ 1
CV-
+
2
3
T2OUT 4
14 V+
C+ 1
13 VCC
C- 2
R2IN 5
11 T1OUT
10 R1IN
R2OUT 6
9
R1OUT
T2IN 7
8
T1IN
T2OUT 4
8
14 GND
13 T1OUT
11 R1OUT
T2IN 7
10 T1IN
N.C. 8
9
N.C.
DIP
SO
V-
14
(16)
3
C2
1.0μF
T1IN
T1OUT 11
T1
(13)
+5V
TTL/CMOS
INPUTS
RS-232
OUTPUTS
400kΩ
12 R1IN
R2IN 5
R2OUT 6
V+
400kΩ
(10)
15 VCC
MAX231
C1-
VCC
+12V TO -12V
VOLTAGE CONVERTER
+5V
16 V+
V- 3
12 GND
MAX231
+
C1+
(11)
7
T2IN
9
R1OUT
T2OUT 4
T2
R1IN 10
R1
TTL/CMOS
OUTPUTS
5kΩ
6 R2OUT
(12)
RS-232
INPUTS
R2IN 5
R2
5kΩ
GND
PIN NUMBERS IN ( ) ARE FOR SO PACKAGE.
12 (14)
Figure 10. MAX231 Pin Configurations and Typical Operating Circuit
20
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V INPUT
1.0μF
TOP VIEW
7
VCC
+5V
400kΩ
T2IN
1
+
T1IN 2
19 R2IN
R1OUT 3
GND 6
RS-232
OUTPUTS
400kΩ
1
T2IN
3
R1OUT
T2OUT 18
R1IN 4
16 C215 C2+
VCC 7
(V+) C1+
TTL/CMOS
INPUTS
17 V-
MAX233
MAX233A
T1OUT 5
T1IN
+5V
18 T2OUT
R1IN 4
T1OUT 5
2
20 R2OUT
14 V+ (C1-)
5kΩ
TTL/CMOS
OUTPUTS
20 R2OUT
13 C1- (C1+)
8
GND 9
12 V- (C2+)
(V-) CS- 10
11 C2+ (C2-)
DIP/SO
8 (13)
DO NOT MAKE
CONNECTIONS TO 13 (14)
THESE PINS
12 (10)
INTERNAL -10V
17
POWER SUPPLY
INTERNAL +10V
POWER SUPPLY
RS-232
INPUTS
R2IN 19
5kΩ C2+ 11 (12)
C1+
C1-
C2+
V-
C2-
V14 (8) V+
CSGND
15
16
10 (11)
GND
6
9
PIN NAMES IN ( ) ARE FOR SO PACKAGE.
Figure 11. MAX233/MAX233A Pin Configuration and Typical Operating Circuit
+5V INPUT
1.0μF
TOP VIEW
7
1.0μF
9
10
T1OUT 1
+
1.0μF
16 T3OUT
T2OUT 2
C1C2+
11 C2-
12 V-
VCC 6
11 C2-
C1+ 7
10 C2+
9
V+ 8
4 T1IN
13 T3IN
GND 5
C1-
+10V TO -10V
VOLTAGE INVERTER
1.0μF
8
V+
V-
12
1.0μF
400kΩ
14 T4IN
MAX234
6
VCC
+5V TO +10V
VOLTAGE DOUBLER
+5V
15 T4OUT
T2IN 3
T1IN 4
C1+
T1
T1OUT
1
T2OUT
2
+5V
400kΩ
3 T2IN
T2
+5V
TTL/CMOS
INPUTS
RS-232
OUTPUTS
400kΩ
13 T3IN
T3
T3OUT
16
T4OUT
15
+5V
DIP/SO
400kΩ
14 T4IN
T4
GND
5
Figure 12. MAX234 Pin Configuration and Typical Operating Circuit
Maxim Integrated
21
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V INPUT
TOP VIEW
1.0μF
12
+5V
VCC
400kΩ
8 T1IN
T1
T1OUT 3
T2
T2OUT 4
+5V
400kΩ
7 T2IN
+5V
400kΩ
T4OUT 1
TTL/CMOS
INPUTS
+
23 R3OUT
T1OUT 3
22 T5IN
T2OUT 4
21 SHDN
MAX235
R2OUT 6
T3OUT 2
T3
RS-232
OUTPUTS
+5V
24 R3IN
T3OUT 2
R2IN 5
15 T3IN
400kΩ
16 T4IN
+5V
20 EN
T4OUT 1
T4
22 T5IN
400kΩ
T5OUT 19
T5
19 T5OUT
T2IN 7
18 R4IN
T1IN 8
17 R4OUT
R1OUT 9
16 T4IN
R1IN 10
15 T3IN
GND 11
14 R5OUT
VCC 12
13 R5IN
DIP
9 R1OUT
R1IN 10
T1
5kΩ
6 R2OUT
R2IN 5
R2
5kΩ
TTL/CMOS
OUTPUTS
23 R3OUT
R3IN 24
R3
RS-232
INPUTS
5kΩ
17 R4OUT
R4IN 18
R4
5kΩ
14 R5OUT
R5IN 13
R5
5kΩ
20 EN
SHDN
21
GND
11
Figure 13. MAX235 Pin Configuration and Typical Operating Circuit
22
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
TOP VIEW
+5V INPUT
1.0μF
9
10
1.0μF
12
13
1.0μF
1.0μF
VCC
+5V TO +10V
VOLTAGE DOUBLER
C1+
C1-
V+
C2+
V-
+10V TO -10V
VOLTAGE INVERTER
14 C2-
11
15
1.0μF
+5V
400kΩ
7 T1IN
T3OUT 1
+
24 T4OUT
T1OUT 2
23 R2IN
T2OUT 3
22 R2OUT
21 SHDN
R1IN 4
R1OUT 5
MAX236
+5V
400kΩ
6 T2IN
TTL/CMOS
INPUTS
19 T4IN
T1IN 7
18 T3IN
GND 8
17 R3OUT
16 R3IN
C1+ 10
15 V-
V+ 11
14 C2-
C1- 12
13 C2+
RS-232
OUTPUTS
+5V
400kΩ
18 T3IN
T3OUT 1
T3
+5V
400kΩ
19 T4IN
VCC 9
T2OUT 3
T2
20 EN
T2IN 6
T1OUT 2
T1
5 R1OUT
T4OUT 24
T4
R1IN 4
R1
5kΩ
DIP/SO
TTL/CMOS
OUTPUTS
22 R2OUT
R2IN 23
R2
RS-232
INPUTS
5kΩ
17 R3OUT
R3IN 16
R3
5kΩ
20 EN
SHDN
21
GND
8
Figure 14. MAX236 Pin Configuration and Typical Operating Circuit
Maxim Integrated
23
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
TOP VIEW
+5V INPUT
1.0μF
10
1.0μF
12
13
1.0μF
14
1.0μF
9
VCC
+5V TO +10V
VOLTAGE DOUBLER
C1+
C1C2+
V+
V-
+10V TO -10V
VOLTAGE INVERTER
C2-
11
15
1.0μF
+5V
T3OUT 1
400kΩ
+
24 T4OUT
T1OUT 2
23 R2IN
T2OUT 3
22 R2OUT
R1IN 4
R1OUT 5
7 T1IN
T2IN 6
+5V
20 T5OUT
19 T4IN
T1IN 7
18 T3IN
GND 8
17 R3OUT
VCC 9
16 R3IN
C1+ 10
15 V-
V+ 11
14 C2-
C1- 12
13 C2+
T1OUT
2
T2OUT
3
T3OUT
1
T4OUT
24
T5OUT
20
400kΩ
6 T2IN
21 T5IN
MAX237
T1
+5V
T2
400kΩ
TTL/CMOS
INPUTS
18 T3IN
+5V
T3
RS-232
OUTPUTS
400kΩ
19 T4IN
+5V
T4
400kΩ
21 T5IN
DIP/SO
5 R1OUT
T5
R1
R1IN
4
5kΩ
TTL/CMOS
OUTPUTS
22 R2OUT
R2
R2IN
23
RS-232
INPUTS
5kΩ
17 R3OUT
R3
R3IN
16
5kΩ
GND
8
Figure 15. MAX237 Pin Configuration and Typical Operating Circuit
24
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
TOP VIEW
+5V INPUT
1.0μF
1.0μF
9
10
1.0μF
12
13
1.0μF
14
VCC
+5V TO +10V
VOLTAGE DOUBLER
C1+
C1-
V+
C2+
V-
+10V TO -10V
VOLTAGE INVERTER
C2-
11
15
1.0μF
+5V
400kΩ
T2OUT 1
+
5 T1IN
24 T3OUT
T1
T1OUT
2
T2OUT
1
+5V
23 R3IN
T1OUT 2
400kΩ
22 R3OUT
R2IN 3
T1IN 5
18 T2IN
21 T4IN
R2OUT 4
MAX238
20 T4OUT
R1OUT 6
19 T3IN
R1IN 7
18 T2IN
GND 8
17 R4OUT
VCC 9
16 R4IN
C1+ 10
15 V-
V+ 11
14 C2-
C1- 12
13 C2+
T2
+5V
TTL/CMOS
INPUTS
RS-232
OUTPUTS
400kΩ
19 T3IN
T3
T3OUT
24
T4OUT
20
+5V
400kΩ
21 T4IN
6 R1OUT
T4
R1
R1IN
7
5kΩ
DIP/SO
4 R2OUT
R2
TTL/CMOS
OUTPUTS
R2IN
3
RS-232
INPUTS
5kΩ
22 R3OUT
R3
R3IN
23
5kΩ
17 R4OUT
R4
R4IN
16
5kΩ
GND
8
Figure 16. MAX238 Pin Configuration and Typical Operating Circuit
Maxim Integrated
25
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
TOP VIEW
+7.5V TO +13.2V
INPUT
+5V INPUT
1.0μF
4
6
1.0μF
7
5
VCC
C1+
V+
V-
+10V TO -10V
VOLTAGE INVERTER
C1-
8
1.0μF
+5V
400kΩ
24 T1IN
R1OUT 1
+
T1
T1OUT
19
T2OUT
20
T3OUT
13
+5V
24 T1IN
400kΩ
R1IN 2
23 T2IN
GND 3
22 R2OUT
23 T2IN
MAX239
T2
+5V
21 R2IN
VCC 4
V+ 5
TTL/CMOS
INPUTS
RS-232
OUTPUTS
400kΩ
20 T2OUT
16 T3IN
C+ 6
19 T1OUT
C- 7
18 R3IN
V- 8
17 R3OUT
R5IN 9
16 T3IN
R5OUT 10
15 N.C.
R4OUT 11
14 EN
1 R1OUT
T3
R1
R1IN
2
5kΩ
22 R2OUT
R2
R2IN 21
13 T3OUT
R4IN 12
5kΩ
DIP/SO
TTL/CMOS
OUTPUTS
17 R3OUT
R3
R3IN 18
RS-232
INPUTS
5kΩ
11 R4OUT
R4
R4IN 12
5kΩ
10 R5OUT
R5
R5IN 9
5kΩ
15
N.C.
14 EN
GND
3
Figure 17. MAX239 Pin Configuration and Typical Operating Circuit
26
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V INPUT
1.0μF
TOP VIEW
25
19
VCC
+5V TO +10V
VOLTAGE DOUBLER
C1+
1.0μF
27
C128
C2+
1.0μF
29 C2-
1.0μF
V+
+5V TO -10V
VOLTAGE INVERTER
V-
26
30
1.0μF
+5V
400kΩ
15 T1IN
+5V
T1
N.C.
R2IN
N.C.
T2OUT
T1OUT
T3OUT
T4OUT
R3IN
R3OUT
T5IN
N.C.
11
10
9
8
7
6
5
4
3
2
1
TTL/CMOS
INPUTS
12
13
14
15
16
17
18
19
20
21
22
MAX240
44
43
42
41
40
39
38
37
36
35
34
N.C.
SHDN
EN
T5OUT
R4IN
R4OUT
T4IN
T3IN
R5OUT
R5IN
N.C.
T3
2 T5IN
16 R1OUT
N.C.
N.C.
C1+
V+
C1C2+
C2
VN.C.
N.C.
N.C.
8
T3OUT
6
T4OUT
5
T5OUT
41
R1IN
17
RS-232
OUTPUTS
400kΩ
38 T4IN
+5V
T2OUT
400kΩ
T4
400kΩ
T5
R1
5kΩ
13 R2OUT
R2
23
24
25
26
27
28
29
30
31
32
33
N.C.
R2OUT
T2IN
T1IN
R1OUT
R1IN
GND
VCC
N.C.
N.C.
N.C.
T2
37 T3IN
+5V
+
7
400kΩ
14 T2IN
+5V
T1OUT
R2IN 10
5kΩ
TTL/CMOS
OUTPUTS
3 R3OUT
R3
R3IN 4
5kΩ
RS-232
INPUTS
Plastic FP
39 R4OUT
R4
R4IN 40
5kΩ
36 R5OUT
R5
R5IN 35
5kΩ
42 EN
GND
SHDN
43
18
Figure 18. MAX240 Pin Configuration and Typical Operating Circuit
Maxim Integrated
27
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V INPUT
TOP VIEW
0.1μF
1
C1+ 1
+
16 VCC
3 C14
C2+
0.1μF
5 C2-
MAX243
V- 6
11 T1IN
T2OUT 7
10 T2IN
9
R2IN 8
V+
+10V TO -10V
VOLTAGE INVERTER
V-
2
+10V
6
-10V
0.1μF
400kΩ
13 R1IN
T1OUT 14
11 T1IN
12 R1OUT
C2- 5
16
VCC
+5V TO +10V
VOLTAGE DOUBLER
+5V
14 T1OUT
C1- 3
C2+ 4
0.1μF
15 GND
V+ 2
C1+
0.1μF
+5V
TTL/CMOS
INPUTS
RS-232
OUTPUTS
400kΩ
T2OUT 7
10 T2IN
R2OUT
DIP/SO
R1IN 13
12 R1OUT
TTL/CMOS
OUTPUTS
5kΩ
9 R2OUT
RECEIVER INPUT
≤ -3V
OPEN
≥ +3V
R1 OUTPUT
HIGH
HIGH
LOW
R2 OUTPUT
HIGH
LOW
LOW
RS-232
INPUTS
R2IN 8
5kΩ
GND
15
Figure 19. MAX243 Pin Configuration and Typical Operating Circuit
28
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V
TOP VIEW
1μF
1μF
20
VCC
+5V TO +10V VOLTAGE DOUBLER
1μF
RB5IN
TB4OUT
TB3OUT
TB2OUT
TB1OUT
TA1OUT
TA2OUT
TA3OUT
TA4OUT
RA4IN
RA5IN
21
1μF
6
5
4
3
2
1
44 43 42 41 40
C1+
23 C124
C2+
25 C2-
26
V- 1μF
+10V TO -10V VOLTAGE INVERTER
2 TA1OUT
+
22
V+
+5V
+5V
TB1OUT 44
400kΩ
RA3IN
7
39 RB4IN
RA2IN
8
38 RB3IN
RA1IN
9
37 RB2IN
RA1OUT
10
36 RB1IN
RA2OUT
11
35 RB1OUT
RA3OUT
12
RA4OUT
13
33 RB3OUT
RA5OUT
14
32 RB4OUT
TA1IN
15
31 RB5OUT
TA2IN
16
30 TB1IN
TA3IN
17
29 TB2IN
MAX244
TB3IN
TB4IN
V-
C2-
C2+
C1-
V+
GND
VCC
19 20 21 22 23 24 25 26 27 28
C1+
18
TA4IN
34 RB2OUT
PLCC
TB1IN 30
15 TA1IN
2 TA2OUT
+5V
+5V
16 TA2IN
3 TA3OUT
TB2IN 29
+5V
+5V
TB3OUT 42
400kΩ
17 TA3IN
4 TA4OUT
TB3IN 28
+5V
+5V
TB4OUT 41
400kΩ
18 TA4IN
TB4IN 27
9 RA1IN
RB1IN 36
5kΩ
5kΩ
10 RA1OUT
RB1OUT 35
8 RA2IN
MAX249 FUNCTIONAL DESCRIPTION
10 RECEIVERS
5 A-SIDE RECEIVERS
5 B-SIDE RECEIVERS
8 TRANSMITTERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
NO CONTROL PINS
TB2OUT 43
400kΩ
RB2IN 37
5kΩ
5kΩ
11 RA2OUT
RB2OUT 34
7 RA3IN
RB3IN 38
5kΩ
5kΩ
12 RA3OUT
RB3OUT 33
6 RA4IN
RB4IN 39
5kΩ
5kΩ
13 RA4OUT
RB4OUT 32
5 RA5IN
RB5IN 40
5kΩ
5kΩ
14 RA5OUT
RB5OUT 31
GND
19
Figure 20. MAX244 Pin Configuration and Typical Operating Circuit
Maxim Integrated
29
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V
TOP VIEW
1μF
ENR
1
40
VCC
+
40
VCC
TA1IN
2
39
ENT
TA2IN
3
38
TB1IN
TA3IN
4
37
TB2IN
TA4IN
5
36
TB3IN
RA5OUT
6
35
TB4IN
RA4OUT
7
34
RB5OUT
MAX245
RA3OUT
8
33
RB4OUT
RA2OUT
9
32
RB3OUT
RA1OUT
10
31
RB2OUT
RA1IN
11
30
RB1OUT
RA2IN
12
29
RB1IN
RA3IN
13
28
RB2IN
RA4IN
14
27
RB3IN
RA5IN
15
26
RB4IN
TA1OUT
16
25
RB5IN
TA2OUT
17
24
TB1OUT
TA3OUT
18
23
TB2OUT
TA4OUT
GND
19
22
TB3OUT
20
21
TB4OUT
16 TA1OUT
+5V
+5V
TB1IN 38
2 TA1IN
17 TA2OUT
+5V
+5V
3 TA2IN
18 TA3OUT
TB2IN 37
+5V
+5V
TB3OUT 22
400kΩ
4 TA3IN
19 TA4OUT
TB3IN 36
+5V
+5V
TB4OUT 21
400kΩ
5 TA4IN
TB4IN 35
1 ENR
ENT 39
11 RA1IN
RB1IN 29
5kΩ
5kΩ
10 RA1OUT
RB1OUT 30
12 RA2IN
RB2IN 28
5kΩ
5kΩ
RB2OUT 31
13 RA3IN
RB3IN 27
5kΩ
5kΩ
MAX245 FUNCTIONAL DESCRIPTION
10 RECEIVERS
5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE)
5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)
8 TRANSMITTTERS
4 A-SIDE TRANSMITTERS
2 CONTROL PINS
1 RECEIVER ENABLE (ENR)
1 TRANSMITTER ENABLE (ENT)
TB2OUT 23
400kΩ
9 RA2OUT
DIP
TB1OUT 24
400kΩ
8 RA3OUT
RB3OUT 32
14 RA4IN
RB4IN 26
5kΩ
5kΩ
7 RA4OUT
RB4OUT 33
15 RA5IN
RB5IN 25
5kΩ
5kΩ
6 RA5OUT
RB5OUT 34
GND
20
Figure 21. MAX245 Pin Configuration and Typical Operating Circuit
30
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V
TOP VIEW
1μF
ENA
1
TA1IN
2
+
40
VCC
39
ENB
TA2IN
3
38
TB1IN
TA3IN
4
37
TB2IN
TA4IN
5
36
TB3IN
RA5OUT
6
35
TB4IN
RA4OUT
7
34
RB5OUT
RA3OUT
8
33
RB4OUT
RA2OUT
9
32
RB3OUT
RA1OUT
10
31
RB2OUT
RA1IN
11
30
RB1OUT
MAX246
RA2IN
12
29
RB1IN
RA3IN
13
28
RB2IN
RA4IN
14
27
RB3IN
RA5IN
15
26
RB4IN
TA1OUT
16
25
RB5IN
TA2OUT
17
24
TB1OUT
TA3OUT
18
23
TB2OUT
TA4OUT
19
22
TB3OUT
GND
20
21
TB4OUT
40
VCC
+5V
+5V
TB1OUT 24
16 TA1OUT
400kΩ
TB1IN 38
2 TA1IN
+5V
+5V
17 TA2OUT
TB2OUT 23
400kΩ
3 TA2IN
TB2IN 37
+5V
+5V
TB3OUT 22
18 TA3OUT
400kΩ
TB3IN 36
4 TA3IN
+5V
+5V
19 TA4OUT
TB4OUT 21
400kΩ
5 TA4IN
TB4IN 35
1 ENA
ENB 39
RB1IN 29
11 RA1IN
5kΩ
5kΩ
RB1OUT 30
10 RA1OUT
DIP
12 RA2IN
RB2IN 28
5kΩ
5kΩ
9 RA2OUT
RB2OUT 31
RB3IN 27
13 RA3IN
MAX246 FUNCTIONAL DESCRIPTION
10 RECEIVERS
5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE)
5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)
8 TRANSMITTERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
2 CONTROL PINS
ENABLE A-SIDE (ENA)
ENABLE B-SIDE (ENB)
5kΩ
5kΩ
RB3OUT 32
8 RA3OUT
RB4IN 26
14 RA4IN
5kΩ
5kΩ
7 RA4OUT
RB4OUT 33
RB5IN 25
15 RA5IN
5kΩ
5kΩ
6 RA5OUT
RB5OUT 34
GND
20
Figure 22. MAX246 Pin Configuration and Typical Operating Circuit
Maxim Integrated
31
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V
TOP VIEW
1μF
40
VCC
2
39
ENTB
TA2IN
3
38
TB1IN
TA3IN
4
37
TB2IN
ENTA
1
TA1IN
40
VCC
+5V
+5V
1 ENTA
+
TB1OUT 24
400kΩ
2 TA1IN
TB1IN 38
+5V
+5V
TB2OUT 23
17 TA2OUT
TA4IN
5
36
TB3IN
RB5OUT
6
35
TB4IN
RA4OUT
7
34
RB4OUT
RA3OUT
8
33
RB3OUT
RA2OUT
9
32
RB2OUT
RA1OUT
10
31
RB1OUT
ENRA
11
30
ENRB
MAX247
16 TA1OUT
RA1IN
12
29
RB1IN
RA2IN
13
28
RB2IN
RA3IN
14
27
RB3IN
RA4IN
15
26
RB4IN
TA1OUT
16
25
RB5IN
TA2OUT
17
24
TB1OUT
TA3OUT
18
23
TB2OUT
TA4OUT
19
22
TB3OUT
GND
20
21
TB4OUT
ENTB 39
400kΩ
TB2IN 37
3 TA2IN
+5V
+5V
18 TA3OUT
TB3OUT 22
400kΩ
4 TA3IN
TB3IN 36
+5V
+5V
TB4OUT 21
19 TA4OUT
400kΩ
5 TA4IN
TB4IN 35
6 RB5OUT
RB5IN 25
5kΩ
12 RA1IN
RB1IN 29
5kΩ
5kΩ
10 RA1OUT
RB1OUT 31
13 RA2IN
RB2IN 28
DIP
5kΩ
5kΩ
MAX247 FUNCTIONAL DESCRIPTION
9 RECEIVERS
4 A-SIDE RECEIVERS
5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE)
8 TRANSMITTERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
4 CONTROL PINS
ENABLE RECEIVER A-SIDE (ENRA)
ENABLE RECEIVER B-SIDE (ENRB)
ENABLE RECEIVER A-SIDE (ENTA)
ENABLE RECEIVER B-SIDE (ENTB)
9 RA2OUT
RB2OUT 32
14 RA3IN
RB3IN 27
5kΩ
5kΩ
8 RA3OUT
RB3OUT 33
15 RA4IN
RB4IN 26
5kΩ
5kΩ
7 RA4OUT
RB4OUT 34
11 ENRA
ENRB 30
GND
20
Figure 23. MAX247 Pin Configuration and Typical Operating Circuit
32
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
TOP VIEW
+5V
1μF
1μF
20
TA3OUT
TA2OUT
TA1OUT
TB1OUT
RB4IN
TA4OUT
TA4OUT
TB3OUT
RA4IN
TB2OUT
RA3IN
21
1μF
6
5
4
3
2
1
44 43 42 41 40
1μF
VCC
+5V TO +10V VOLTAGE DOUBLER
C1+
23 C124
C2+
25 C2-
V-
39 RB3IN
RA1IN
8
38 RB2IN
ENRA
9
37 RB1IN
RA1OUT
10
36 ENRB
RA2OUT
11
35 RB1OUT
RA3OUT
12
RA4OUT
13
33 RB3OUT
TA1IN
14
32 RB4OUT
MAX248
34 RB2OUT
TA2IN
15
31 TB1IN
TA3IN
16
30 TB2IN
29 TB3IN
TB4IN
ENTB
V-
C2-
C2+
C1-
V+
GND
C1+
19 20 21 22 23 24 25 26 27 28
VCC
18
ENTA
17
PLCC
TB1OUT 44
400kΩ
14 TA1IN
TB1IN 31
+5V
+5V
2 TA2OUT
TB2OUT 43
400kΩ
15 TA2IN
TB2IN 30
+5V
+5V
TB3OUT 42
3 TA3OUT
400kΩ
16 TA3IN
TB3IN 29
+5V
+5V
4 TA4OUT
TB4OUT 41
400kΩ
17 TA4IN
TB4IN 28
8 RA1IN
RB1IN 37
5kΩ
5kΩ
MAX248 FUNCTIONAL DESCRIPTION
8 RECEIVERS
4 A-SIDE RECEIVERS
4 B-SIDE RECEIVERS
8 TRANSMITTERS
4 A-SIDE TRANSMITTERS
4 B-SIDE TRANSMITTERS
4 CONTROL PINS
ENABLE RECEIVER A-SIDE (ENRA)
ENABLE RECEIVER B-SIDE (ENRB)
ENABLE RECEIVER A-SIDE (ENTA)
ENABLE RECEIVER B-SIDE (ENTB)
1μF
+5V
1 TA1OUT
7
26
ENTB 27
+5V
RA2IN
22
+10V TO -10V VOLTAGE INVERTER
18 ENTA
+
TA4IN
V+
10 RA1OUT
RB1OUT 35
7 RA2IN
RB2IN 38
5kΩ
5kΩ
11 RA2OUT
RB2OUT 34
6 RA3IN
RB3IN 39
5kΩ
5kΩ
12 RA3OUT
RB3OUT 33
5 RA4IN
RB4IN 40
5kΩ
5kΩ
13 RA4OUT
RB4OUT 32
9 ENRA
ENRB 36
GND
19
Figure 24. MAX248 Pin Configuration and Typical Operating Circuit
Maxim Integrated
33
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
+5V
TOP VIEW
1μF
1μF
20
TA3OUT
TA2OUT
TA1OUT
TB1OUT
RB4IN
1μF
6
5
4
3
2
1
44 43 42 41 40
1μF
RB5IN
RA5IN
TB3OUT
RA4IN
TB2OUT
RA3IN
21
C1+
23 C124
C2+
25 C2-
VCC
+5V TO +10V VOLTAGE DOUBLER
V-
39 RB3IN
RA1IN
8
38 RB2IN
ENRA
9
37 RB1IN
RA1OUT
10
36 ENRB
RA2OUT
11
35 RB1OUT
RA3OUT
12
RA4OUT
13
33 RB3OUT
RA5OUT
14
32 RB4OUT
MAX249
34 RB2OUT
TA1IN
15
31 RB5OUT
TA2IN
16
30 TB1IN
29 TB2IN
TB3IN
ENTB
V-
C2-
C2+
C1-
V+
GND
C1+
19 20 21 22 23 24 25 26 27 28
VCC
18
ENTA
17
PLCC
TB1OUT 44
400kΩ
15 TA1IN
TB1IN 30
+5V
+5V
2 TA2OUT
TB2OUT 43
400kΩ
16 TA2IN
TB2IN 29
+5V
+5V
3 TA3OUT
TB3OUT 42
400kΩ
17 TA3IN
TB3IN 28
8 RA1IN
RB1IN 37
5kΩ
5kΩ
10 RA1OUT
RB1OUT 35
7 RA2IN
RB2IN 38
5kΩ
5kΩ
MAX249 FUNCTIONAL DESCRIPTION
10 RECEIVERS
5 A-SIDE RECEIVERS
5 B-SIDE RECEIVERS
6 TRANSMITTERS
3 A-SIDE TRANSMITTERS
3 B-SIDE TRANSMITTERS
4 CONTROL PINS
ENABLE RECEIVER A-SIDE (ENRA)
ENABLE RECEIVER B-SIDE (ENRB)
ENABLE RECEIVER A-SIDE (ENTA)
ENABLE RECEIVER B-SIDE (ENTB)
1μF
+5V
1 TA1OUT
7
26
ENTB 27
+5V
RA2IN
22
+10V TO -10V VOLTAGE INVERTER
18 ENTA
+
TA3IN
V+
11 RA2OUT
RB2OUT 34
6 RA3IN
RB3IN 39
5kΩ
5kΩ
12 RA3OUT
RB3OUT 33
5 RA4IN
RB4IN 40
5kΩ
5kΩ
13 RA4OUT
RB4OUT 32
4 RA5IN
RB5IN 41
5kΩ
5kΩ
14 RA5OUT
RB5OUT 31
9 ENRA
ENRB 36
GND
19
Figure 25. MAX249 Pin Configuration and Typical Operating Circuit
34
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
___________________________________________Ordering Information (continued)
PART
TEMP RANGE
PIN-PACKAGE
MAX222CPN+
0°C to +70°C
18 Plastic DIP
PART
MAX232AC/D
TEMP RANGE
0°C to +70°C
PIN-PACKAGE
Dice*
MAX222CWN+
0°C to +70°C
18 Wide SO
MAX232AEPE+
-40°C to +85°C
16 Plastic DIP
MAX222C/D
0°C to +70°C
Dice*
MAX232AESE+
-40°C to +85°C
16 Narrow SO
MAX222EPN+
-40°C to +85°C
18 Plastic DIP
MAX232AEWE+
-40°C to +85°C
16 Wide SO
MAX222EWN+
-40°C to +85°C
18 Wide SO
MAX232AEJE
-40°C to +85°C
16 CERDIP
MAX222EJN
-40°C to +85°C
18 CERDIP
MAX232AMJE
-55°C to +125°C
16 CERDIP
MAX222MJN
-55°C to +125°C
18 CERDIP
MAX232AMLP+
-55°C to +125°C
20 LCC
MAX223CAI+
0°C to +70°C
28 SSOP
MAX233CPP+
0°C to +70°C
20 Plastic DIP
MAX223CWI+
0°C to +70°C
28 Wide SO
MAX233EPP+
-40°C to +85°C
20 Plastic DIP
Dice*
MAX233ACPP+
0°C to +70°C
20 Plastic DIP
0°C to +70°C
20 Wide SO
MAX223C/D
0°C to +70°C
MAX223EAI+
-40°C to +85°C
28 SSOP
MAX233ACWP+
MAX223EWI+
-40°C to +85°C
28 Wide SO
MAX233AEPP+
-40°C to +85°C
20 Plastic DIP
MAX225CWI+
0°C to +70°C
28 Wide SO
MAX233AEWP+
-40°C to +85°C
20 Wide SO
MAX225EWI+
-40°C to +85°C
28 Wide SO
MAX234CPE+
0°C to +70°C
16 Plastic DIP
MAX230CPP+
0°C to +70°C
20 Plastic DIP
MAX234CWE+
0°C to +70°C
16 Wide SO
MAX230CWP+
0°C to +70°C
20 Wide SO
MAX234C/D
0°C to +70°C
Dice*
MAX230C/D
0°C to +70°C
Dice*
MAX234EPE+
-40°C to +85°C
16 Plastic DIP
20 Plastic DIP
MAX234EWE+
-40°C to +85°C
16 Wide SO
-40°C to +85°C
16 CERDIP
-55°C to +125°C
16 CERDIP
MAX230EPP+
-40°C to +85°C
MAX230EWP+
-40°C to +85°C
20 Wide SO
MAX234EJE
MAX230EJP
-40°C to +85°C
20 CERDIP
MAX234MJE
MAX230MJP
-55°C to +125°C
20 CERDIP
MAX235CPG+
0°C to +70°C
24 Wide Plastic DIP
MAX231CPD+
0°C to +70°C
14 Plastic DIP
MAX235EPG+
-40°C to +85°C
24 Wide Plastic DIP
MAX231CWE+
0°C to +70°C
16 Wide SO
MAX235EDG
-40°C to +85°C
24 Ceramic SB
MAX231CJD
0°C to +70°C
14 CERDIP
MAX235MDG
-55°C to +125°C
24 Ceramic SB
MAX231C/D
0°C to +70°C
Dice*
MAX236CNG+
0°C to +70°C
24 Narrow Plastic DIP
MAX231EPD+
-40°C to +85°C
14 Plastic DIP
MAX236CWG+
0°C to +70°C
24 Wide SO
MAX231EWE+
-40°C to +85°C
16 Wide SO
MAX236C/D
0°C to +70°C
Dice*
-40°C to +85°C
24 Narrow Plastic DIP
MAX231EJD
-40°C to +85°C
14 CERDIP
MAX236ENG+
MAX231MJD
-55°C to +125°C
14 CERDIP
MAX236EWG+
-40°C to +85°C
24 Wide SO
MAX232CPE+
0°C to +70°C
16 Plastic DIP
MAX236ERG
-40°C to +85°C
24 Narrow CERDIP
MAX232CSE+
0°C to +70°C
16 Narrow SO
MAX236MRG
-55°C to +125°C
24 Narrow CERDIP
MAX232CWE+
0°C to +70°C
16 Wide SO
MAX237CNG+
0°C to +70°C
24 Narrow Plastic DIP
0°C to +70°C
Dice*
MAX237CWG+
0°C to +70°C
24 Wide SO
MAX232EPE+
-40°C to +85°C
16 Plastic DIP
MAX237C/D
0°C to +70°C
Dice*
MAX232ESE+
-40°C to +85°C
16 Narrow SO
MAX237ENG+
-40°C to +85°C
24 Narrow Plastic DIP
MAX232EWE+
-40°C to +85°C
16 Wide SO
MAX237EWG+
-40°C to +85°C
24 Wide SO
-40°C to +85°C
24 Narrow CERDIP
MAX232C/D
MAX232EJE
-40°C to +85°C
16 CERDIP
MAX237ERG
MAX232MJE
-55°C to +125°C
16 CERDIP
MAX237MRG
-55°C to +125°C
24 Narrow CERDIP
MAX232MLP+
-55°C to +125°C
20 LCC
MAX238CNG+
0°C to +70°C
24 Narrow Plastic DIP
MAX232ACPE+
0°C to +70°C
16 Plastic DIP
MAX238CWG+
0°C to +70°C
24 Wide SO
MAX232ACSE+
0°C to +70°C
16 Narrow SO
MAX238C/D
0°C to +70°C
Dice*
MAX232ACWE+
0°C to +70°C
16 Wide SO
Maxim Integrated
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Contact factory for dice specifications.
35
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
___________________________________________Ordering Information (continued)
PART
MAX238ENG+
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
24 Narrow Plastic DIP
PART
MAX243CPE+
TEMP RANGE
0°C to +70°C
PIN-PACKAGE
16 Plastic DIP
MAX238EWG+
-40°C to +85°C
24 Wide SO
MAX243CSE+
0°C to +70°C
16 Narrow SO
MAX238ERG
-40°C to +85°C
24 Narrow CERDIP
MAX243CWE+
0°C to +70°C
16 Wide SO
MAX238MRG
-55°C to +125°C
24 Narrow CERDIP
MAX243C/D
0°C to +70°C
Dice*
MAX239CNG+
0°C to +70°C
24 Narrow Plastic DIP
MAX243EPE+
-40°C to +85°C
16 Plastic DIP
MAX239CWG+
0°C to +70°C
24 Wide SO
MAX243ESE+
-40°C to +85°C
16 Narrow SO
MAX239C/D
0°C to +70°C
Dice*
MAX243EWE+
-40°C to +85°C
16 Wide SO
MAX239ENG+
-40°C to +85°C
24 Narrow Plastic DIP
MAX243EJE
-40°C to +85°C
16 CERDIP
MAX239EWG+
-40°C to +85°C
24 Wide SO
MAX243MJE
-55°C to +125°C
16 CERDIP
MAX239ERG
-40°C to +85°C
24 Narrow CERDIP
MAX244CQH+
MAX239MRG
-55°C to +125°C
0°C to +70°C
44 PLCC
0°C to +70°C
Dice*
24 Narrow CERDIP
MAX244C/D
MAX240CMH+
0°C to +70°C
44 Plastic FP
MAX244EQH+
-40°C to +85°C
MAX240C/D
0°C to +70°C
Dice*
MAX245CPL+
0°C to +70°C
40 Plastic DIP
MAX241CAI+
0°C to +70°C
28 SSOP
MAX245C/D
0°C to +70°C
Dice*
MAX241CWI+
0°C to +70°C
28 Wide SO
MAX245EPL+
-40°C to +85°C
40 Plastic DIP
MAX241C/D
0°C to +70°C
Dice*
MAX246CPL+
0°C to +70°C
40 Plastic DIP
0°C to +70°C
Dice*
44 PLCC
MAX241EAI+
-40°C to +85°C
28 SSOP
MAX246C/D
MAX241EWI+
-40°C to +85°C
28 Wide SO
MAX246EPL+
-40°C to +85°C
40 Plastic DIP
0°C to +70°C
40 Plastic DIP
0°C to +70°C
Dice*
MAX242CAP+
0°C to +70°C
20 SSOP
MAX247CPL+
MAX242CPN+
0°C to +70°C
18 Plastic DIP
MAX247C/D
MAX242CWN+
0°C to +70°C
18 Wide SO
MAX247EPL+
MAX242C/D
0°C to +70°C
Dice*
MAX248CQH+
0°C to +70°C
44 PLCC
0°C to +70°C
Dice*
-40°C to +85°C
40 Plastic DIP
MAX242EPN+
-40°C to +85°C
18 Plastic DIP
MAX248C/D
MAX242EWN+
-40°C to +85°C
18 Wide SO
MAX248EQH+
-40°C to +85°C
44 PLCC
MAX242EJN
-40°C to +85°C
18 CERDIP
MAX249CQH+
0°C to +70°C
44 PLCC
MAX242MJN
-55°C to +125°C
18 CERDIP
MAX249EQH+
-40°C to +85°C
44 PLCC
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Contact factory for dice specifications.
36
Maxim Integrated
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
Package Information
For the latest package outline information and land patterns, 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 pertains to
the package regardless of RoHS status.
PACKAGE TYPE
PACKAGE CODE
14 PDIP
P14+3
16 PDIP
P16+1
16 PDIP
P16+2
16 PDIP
P16+3
18 PDIP
P18+5
20 PDIP
P20+3
20 PDIP
P20M+1
24 PDIP
N24+3
24 PDIP
P24M+1
28 PDIP
P28+2
40 PDIP
P40+1
40 PDIP
P40M+2
14 CERDIP
J14-3
16 CERDIP
J16-3
18 CERDIP
J18-2
OUTLINE NO.
LAND PATTERN NO.
21-0043
—
21-0044
21-0045
20 CERDIP
J20-2
24 CERDIP
R24-4
16 SO(N)
S16+3
16 SO(N)
S16+5
16 SO(W)
W16+1
16 SO(W)
W16+2
16 SO(W)
W16+3
18 SO(W)
W18+1
20 SO(W)
W20+3
20 SO(W)
W20M+1
24 SO(W)
W24+2
28 SO(W)
W28+1
28 SO(W)
W28+2
28 SO(W)
W28M+1
20 LCC
L20+3
20 SSOP
A20+1
24 SSOP
A24+2
28 SSOP
A28+1
16 TSSOP
U16+1
16 FPCK
F16-3
21-0013
—
44 MQFP
M44+5
21-0826
90-0169
44 PLCC
Q44+1
44 PLCC
Q44+2
21-0049
90-0236
Maxim Integrated
21-0041
90-0097
90-0107
90-0181
21-0042
90-0108
90-0182
90-0109
21-0658
90-0177
90-0094
21-0056
90-0110
90-0095
90-0117
37
MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
Revision History
REVISION
NUMBER
REVISION
DATE
15
1/06
Added part information to the lead temperature in the Absolute Maximum Ratings
sections
16
7/10
Changed multiple packages to lead-free versions; updated/added notes 3, 4, 5, 7,
and 8 to the Electrical Characteristics table; removed incorrect subscripting from all
pin names in the Electrical Characteristics table and Pin Configurations
DESCRIPTION
PAGES
CHANGED
2, 5, 8
1, 2–9, 17–36
Maxim cannot assume 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.
38
© Maxim Integrated
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc.