MAX220–MAX249
+5V-Powered, Multichannel
RS-232 Drivers/Receivers
General Description
The MAX220–MAX249 family of line drivers/receivers is
intended for all EIA/TIA-232E and V.28/V.24 communica-
tions interfaces, particularly applications where ±12V is
not available.
The MAX225, MAX233, MAX235, and MAX245/MAX246/
MAX247 use no external components and are
recommended for applications where printed circuit
board space is critical.
The MAX220-MAX249 are offered in 26 different pack-
ages with temperatures from 0 to +70°C up to -55°C to
+125°C. See ordering information table at the end of the
data sheet for all package and temperature options.
Benefits and Features
Saves Board Space
•
Integrated Charge Pump Circuitry
•
Eliminates the Need for a Bipolar
±12V
Supply
•
Enables Single Supply Operation from +5V Supply
•
Integrated Capacitors (MAX223, MAX233, MAX235,
MAX245-MAX247)
Saves Power for Reduced Power Requirements
•
5µW Shutdown Mode
Ordering Information and Selection Table appears at end
of data sheet.
Applications
•
Interface Translation
•
Multidrop RS-232 Networks
•
Portable Diagnostics Equipment
AutoShutdown and UCSP are trademarks of Maxim Integrated
Products, Inc.
MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit
+5V INPUT
C3
TOP VIEW
C5
C1+ 1
V+ 2
C1- 3
C2+ 4
C2- 5
V- 6
T2OUT 7
R2IN 8
+
16 V
CC
15 GND
14 T1OUT
C1
C2
16
V
CC
C1+
+5V TO +10V
3 C1-
VOLTAGE DOUBLER
4
C2+
+10V TO -10V
5 C2- VOLTAGE INVERTER
1
+5V
400kΩ
11 T1IN
V+ 2 +10V
6
-10V
C4
V-
MAX220
MAX232
MAX232A
13 R1IN
12 R1OUT
11 T1IN
10 T2IN
9
R2OUT
TTL/CMOS
INPUTS
T1OUT 14
RS-232
OUTPUTS
T2OUT 7
+5V
400kΩ
10 T2IN
12 R1OUT
DIP/SO
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
TTL/CMOS
OUTPUTS
R1IN 13
5kΩ
RS-232
INPUTS
9 R2OUT
R2IN 8
5kΩ
GND
15
19-4323; Rev 17; 1/15
MAX220–MAX249
+5V-Powered, Multichannel
RS-232 Drivers/Receivers
Absolute Maximum Ratings—MAX220/222/232A/233A/242/243
(Voltages referenced to GND.)
V
CC
...........................................................................-0.3V to +6V
V+ (Note 1) ..................................................(V
CC
- 0.3V) to +14V
V- (Note 1) ..............................................................+0.3V to -14V
Input Voltages
TIN .............................................................-0.3V to (V
CC
- 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 (V
CC
+ 0.3V)
Driver/Receiver Output Short Circuited to GND.........Continuous
Continuous Power Dissipation (T
A
= +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
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
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, V
SHDN
or V
CC
= 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
(V
CC
= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T
A
= T
MIN
to T
MAX
‚ unless otherwise noted.) (Note 3)
PARAMETER
RS-232 TRANSMITTERS
Output Voltage Swing
Input Logic-Low Voltage
Input Logic-High Voltage
All devices except MAX220
MAX220: V
CC
= +5.0V
All except MAX220, normal operation
Logic Pullup/lnput Current
V
SHDN
= 0V, MAX222/MAX242, shutdown,
MAX220
V
CC
= +5.5V, V
SHDN
= 0V, V
OUT
= ±15V,
MAX222/MAX242
Output Leakage Current
V
CC
= V
SHDN
= 0V
Data Rate
Transmitter Output Resistance
Output Short-Circuit Current
RS-232 RECEIVERS
RS-232 Input Voltage Operating Range
RS-232 Input Threshold Low
RS-232 Input Threshold High
V
CC
= +5V
V
CC
= +5V
±30
MAX220
All except MAX243 R2IN
MAX243 R2IN (Note 4)
All except MAX243 R2IN
MAX243 R2IN (Note 4)
0.8
-3
1.8
-0.5
2.4
-0.1
1.3
±25
V
V
V
V
CC
= V+ = V- = 0V, V
OUT
= ±2V
V
OUT
= 0V
V
OUT
= 0V
MAX220
300
±7
V
OUT
= ±15V
MAX220, V
OUT
= ±12V
200
10M
±22
±60
mA
2
2.4
5
±0.01
±0.01
±0.01
40
±1
±10
±10
±25
116
kbps
μA
μA
All transmitter outputs loaded with 3k
to GND
±5
±8
1.4
1.4
0.8
V
V
V
CONDITIONS
MIN
TYP
MAX
UNITS
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Maxim Integrated | 2
MAX220–MAX249
+5V-Powered, Multichannel
RS-232 Drivers/Receivers
Electrical Characteristics—MAX220/222/232A/233A/242/243 (continued)
(V
CC
= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T
A
= T
MIN
to T
MAX
‚ unless otherwise noted.) (Note 3)
PARAMETER
CONDITIONS
All except MAX220/MAX243, V
CC
= +5V, no
hysteresis in shutdown
RS-232 Input Hysteresis
MAX220
MAX243
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
EN Input Threshold Low
EN Input Threshold High
Supply Voltage Range
MAX220
No load
V
CC
Supply Current (V
SHDN
= V
CC
),
Figures 5, 6, 11, 19
3k load
both inputs
MAX222/MAX232A/MAX233A/
MAX242/MAX243
MAX220
MAX222/MAX232A/MAX233A/
MAX242/MAX243
T
A
= +25°C
Shutdown Supply Current
MAX222/
MAX242
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
T
A
= -55°C to +125°C
SHDN
Input Leakage Current
SHDN
Threshold Low
SHDN
Threshold High
MAX222/MAX242
MAX222/MAX242
MAX222/MAX242
C
L
= 50pF to 2500pF,
MAX222/MAX232A/
R
L
= 3k to 7k ,
MAX233/MAX242/MAX243
V
CC
= +5V, T
A
=
+25°C, measured
from +3V to -3V or MAX220
-3V to +3V
t
PHLT
, Figure 1
Transmitter Propagation Delay TLL to
RS-232 (Normal Operation)
t
PLHT
, Figure 1
MAX222/MAX232A/
MAX233/MAX242/MAX243
MAX220
MAX222/MAX232A/
MAX233/MAX242/MAX243
MAX220
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MIN
0.2
TYP
0.5
0.3
1
MAX
1.0
UNITS
V
T
A
= +25°C (MAX220)
I
OUT
= 3.2mA
I
OUT
= 1.6mA (MAX220)
I
OUT
= -1.0mA
Sourcing V
OUT
= V
GND
Sinking V
OUT
= V
CC
V
SHDN
= V
CC
or V
EN
= V
CC
(V
SHDN
= 0V for
MAX222), 0V V
OUT
V
CC
MAX242
MAX242
3
3
5
5
0.2
7
7
0.4
0.4
k
V
V
mA
3.5
-2
10
V
CC
- 0.2
-10
30
±0.05
1.4
±10
0.8
5.5
0.5
4
12
15
0.1
2
2
35
1.4
10
50
50
100
±1
0.8
2
10
μA
V
V
V
2.0
4.5
1.4
mA
μA
μA
V
V
2.0
6
1.4
12
30
Transition Slew Rate
V/μs
1.5
3
30.0
1.3
4
1.5
5
3.5
10
3.5
10
Maxim Integrated | 3
μs
MAX220–MAX249
+5V-Powered, Multichannel
RS-232 Drivers/Receivers
Electrical Characteristics—MAX220/222/232A/233A/242/243 (continued)
(V
CC
= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T
A
= T
MIN
to T
MAX
‚ unless otherwise noted.) (Note 3)
PARAMETER
t
PHLR
, Figure 2
Receiver Propagation Delay RS-232 to
TLL (Normal Operation)
t
PLHR
, Figure 2
Receiver Propagation Delay RS-232 to
TLL (Shutdown)
Receiver-Output Enable Time
Receiver-Output Disable Time
Transmitter-Output Enable Time
(SHDN Goes High)
Transmitter-Output Disable Time
(SHDN Goes Low)
Transmitter + to - Propagation Delay
Difference (Normal Operation)
Receiver + to - Propagation Delay
Difference (Normal Operation)
t
PHLS
, Figure 2
t
PHLS
, Figure 2
t
ER
t
DR
t
ET
CONDITIONS
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MAX242
MAX242
MAX242, Figure 3
MAX242, Figure 3
MAX222/MAX242, 0.1μF
caps (includes charge-pump
start-up), Figure 4
MAX222/MAX242,
0.1μF caps, Figure 4
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
t
PHLR
- t
PLHR
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MIN
TYP
0.5
0.6
0.6
0.8
0.5
2.5
125
160
250
MAX
1
3
1
3
10
10
500
500
μs
ns
ns
μs
μs
UNITS
t
DT
600
300
2000
100
225
ns
t
PHLT
- t
PLHT
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
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX220-01
AVAILABLE OUTPUT CURRENT
vs. DATA RATE
MAX220-02
MAX222/MAX242
ON-TIME EXITING SHUTDOWN
1μF CAPS
V+
V+, V- VOLTAGE (V)
+5V
+5V
0V
0V
1μF CAPS
0.1μF CAPS
V-
-10V
V-
500μs/div
0.1μF CAPS
SHDN
V+
MAX220-03
10
8
6
OUTPUT VOLTAGE (V)
4
2
0
-2
-4
-6
-8
-10
0
5
EITHER V+ OR V- LOADED
V
CC
= +5V
NO LOAD ON
TRANSMITTER OUTPUTS
(EXCEPT MAX220, MAX233A)
V- LOADED, NO LOAD ON V+
0.1μF
1μF
11
10
OUTPUT CURRENT (mA)
9
8
7
6
5
ALL CAPS
0.1μF
ALL CAPS
1μF
V
CC
= +5.25V
OUTPUT LOAD CURRENT
FLOWS FROM V+ TO V-
+10V
0.1μF
1μF
V
CC
= +4.75V
V+ LOADED, NO LOAD ON V-
10
15
20
25
LOAD CURRENT (mA)
4
0
10
20
30
40
50
60
DATA RATE (kb/s)
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Maxim Integrated | 4
MAX220–MAX249
+5V-Powered, Multichannel
RS-232 Drivers/Receivers
Absolute Maximum Ratings—MAX223/MAX230–MAX241
(Voltages referenced to GND.)
V
CC
...........................................................................-0.3V to +6V
V+ ................................................................(V
CC
- 0.3V) to +14V
V- ............................................................................+0.3V to -14V
Input Voltages
TIN ............................................................-0.3V to (V
CC
+ 0.3V)
RIN .....................................................................................±30V
Output Voltages
TOUT ..................................................(V+ + 0.3V) to (V- - 0.3V)
ROUT........................................................-0.3V to (V
CC
+ 0.3V)
Short-Circuit Duration, TOUT to GND ........................Continuous
Continuous Power Dissipation (T
A
= +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, V
CC
= +5V ±10%; V+ = +7.5V to +13.2V; T
A
= T
MIN
to T
MAX
; unless otherwise noted.) (Note 5)
PARAMETER
Output Voltage Swing
V
CC
Supply Current
CONDITIONS
All transmitter outputs loaded with 3kΩ to ground
MAX232/233
No load,
T
A
= +25°C
MAX223/230/234–238/240/241
MAX231/239
MAX231
MAX239
T
A
= +25°C
MAX223
MAX230/235/236/240/241
2.0
2.4
1.5
-30
200
+30
V
µA
V
MIN
±5.0
TYP
±7.3
5
7
0.4
1.8
5
15
1
10
15
1
5
15
50
10
0.8
mA
µA
V
mA
MAX
UNITS
V
V+ Supply Current
Shutdown Supply Current
Input Logic-Low Voltage
Input Logic-High Voltage
Logic Pullup Current
Receiver Input Voltage
Operating Range
TIN, EN,
SHDN
(MAX233);
EN,
SHDN (MAX230/235–241)
TIN
EN,
SHDN
(MAX223);
EN,
SHDN (MAX230/235/236/240/241)
V
TIN
= 0V
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