General Description
The MAX220MAX249 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.
These parts are especially useful in battery-powered sys-
tems, since their low-power shutdown mode reduces
power dissipation to less than 5W. The MAX225,
MAX233, MAX235, and MAX245/MAX246/MAX247 use
no external components and are recommended for appli-
cations where printed circuit board space is critical.
________________________Applications
Portable Computers
Low-Power Modems
Interface Translation
Battery-Powered RS-232 Systems
Multidrop RS-232 Networks
____________________________Features
Superior to Bipolar
o Operate from Single +5V Power Supply
(+5V and +12V--MAX231/MAX239)
o Low-Power Receive Mode in Shutdown
(MAX223/MAX242)
o Meet All EIA/TIA-232E and V.28 Specifications
o Multiple Drivers and Receivers
o 3-State Driver and Receiver Outputs
o Open-Line Detection (MAX243)
Ordering Information
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
MAX220MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
________________________________________________________________ Maxim Integrated Products
1
Selection Table
19-4323; Rev 10; 8/01
PART
MAX220CPE
MAX220CSE
MAX220CWE
0C to +70C
0C to +70C
0C to +70C
TEMP. RANGE
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
16 Wide SO
MAX220C/D
0C to +70C
Dice*
MAX220EPE
MAX220ESE
MAX220EWE
-40C to +85C
-40C to +85C
-40C to +85C
16 Plastic DIP
16 Narrow SO
16 Wide SO
MAX220EJE
-40C to +85C
16 CERDIP
MAX220MJE
-55C to +125C
16 CERDIP
Power
No. of
Nominal
SHDN
Rx
Part
Supply
RS-232
No. of
Cap. Value & Three- Active in Data Rate
Number
(V)
Drivers/Rx Ext. Caps (F)
State
SHDN
(kbps)
Features
MAX220
+5
2/2
4
0.1
No
--
120
Ultra-low-power, industry-standard pinout
MAX222
+5
2/2
4 0.1
Yes
--
200
Low-power
shutdown
MAX223 (MAX213) +5
4/5
4
1.0 (0.1)
Yes
120
MAX241 and receivers active in shutdown
MAX225
+5
5/5
0
--
Yes
120
Available in SO
MAX230 (MAX200) +5
5/0
4
1.0 (0.1)
Yes
--
120
5 drivers with shutdown
MAX231 (MAX201) +5 and
2/2
2
1.0 (0.1)
No
--
120
Standard +5/+12V or battery supplies;
+7.5 to +13.2
same functions as MAX232
MAX232 (MAX202) +5
2/2
4
1.0 (0.1)
No
--
120 (64)
Industry standard
MAX232A
+5
2/2
4
0.1
No
--
200
Higher slew rate, small caps
MAX233 (MAX203) +5
2/2
0
--
No
--
120
No external caps
MAX233A
+5
2/2
0
--
No
--
200
No external caps, high slew rate
MAX234 (MAX204) +5
4/0
4
1.0 (0.1)
No
--
120
Replaces 1488
MAX235 (MAX205) +5
5/5
0
--
Yes
--
120
No external caps
MAX236 (MAX206) +5
4/3
4
1.0 (0.1)
Yes
--
120
Shutdown, three state
MAX237 (MAX207) +5
5/3
4
1.0 (0.1)
No
--
120
Complements IBM PC serial port
MAX238 (MAX208) +5
4/4
4
1.0 (0.1)
No
--
120
Replaces 1488 and 1489
MAX239 (MAX209) +5 and
3/5
2
1.0 (0.1)
No
--
120
Standard +5/+12V or battery supplies;
+7.5 to +13.2
single-package solution for IBM PC serial port
MAX240
+5
5/5
4
1.0
Yes
--
120
DIP or flatpack package
MAX241 (MAX211) +5
4/5
4
1.0 (0.1)
Yes
--
120
Complete IBM PC serial port
MAX242
+5
2/2
4
0.1
Yes
200
Separate shutdown and enable
MAX243
+5
2/2
4
0.1
No
--
200
Open-line detection simplifies cabling
MAX244
+5
8/10
4
1.0
No
--
120
High slew rate
MAX245
+5
8/10
0
--
Yes
120
High slew rate, int. caps, two shutdown modes
MAX246
+5
8/10
0
--
Yes
120
High slew rate, int. caps, three shutdown modes
MAX247
+5
8/9
0
--
Yes
120
High slew rate, int. caps, nine operating modes
MAX248
+5
8/8
4
1.0
Yes
120
High slew rate, selective half-chip enables
MAX249
+5
6/10
4
1.0
Yes
120
Available in quad flatpack package
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
MAX220MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS--MAX220/222/232A/233A/242/243
ELECTRICAL CHARACTERISTICS--MAX220/222/232A/233A/242/243
(V
CC
= +5V 10%, C1C4 = 0.1F, MAX220, C1 = 0.047F, C2C4 = 0.33F, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Note 1: Input voltage measured with T
OUT
in high-impedance state, SHDN or V
CC
= 0V.
Note 2: For the MAX220, V+ and V- can have a maximum magnitude 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.
Supply Voltage (V
CC
) ...............................................-0.3V to +6V
Input Voltages
T
IN
..............................................................-0.3V to (V
CC
- 0.3V)
R
IN
(Except MAX220) ........................................................30V
R
IN
(MAX220).....................................................................25V
T
OUT
(Except MAX220) (Note 1) .......................................15V
T
OUT
(MAX220)...............................................................13.2V
Output Voltages
T
OUT
...................................................................................15V
R
OUT
.........................................................-0.3V to (V
CC
+ 0.3V)
Driver/Receiver Output Short Circuited to GND.........Continuous
Continuous Power Dissipation (T
A
= +70C)
16-Pin Plastic DIP (derate 10.53mW/C above +70C)....842mW
18-Pin Plastic DIP (derate 11.11mW/C above +70C)....889mW
20-Pin Plastic DIP (derate 8.00mW/C above +70C) ..440mW
16-Pin Narrow SO (derate 8.70mW/C above +70C) ...696mW
16-Pin Wide SO (derate 9.52mW/C above +70C)......762mW
18-Pin Wide SO (derate 9.52mW/C above +70C)......762mW
20-Pin Wide SO (derate 10.00mW/C above +70C)....800mW
20-Pin SSOP (derate 8.00mW/C above +70C) ..........640mW
16-Pin CERDIP (derate 10.00mW/C above +70C).....800mW
18-Pin CERDIP (derate 10.53mW/C above +70C).....842mW
Operating Temperature Ranges
MAX2_ _AC_ _, MAX2_ _C_ _ .............................0C to +70C
MAX2_ _AE_ _, MAX2_ _E_ _ ..........................-40C to +85C
MAX2_ _AM_ _, MAX2_ _M_ _ .......................-55C to +125C
Storage Temperature Range .............................-65C to +160C
Lead Temperature (soldering, 10sec) .............................+300C
V
1.4
0.8
Input Logic Threshold Low
UNITS
MIN
TYP
MAX
PARAMETER
CONDITIONS
Input Logic Threshold High
All devices except MAX220
2
1.4
V
All except MAX220, normal operation
5
40
Logic Pull-Up/lnput Current
SHDN = 0V, MAX222/242, shutdown, MAX220
0.01
1
A
V
CC
= 5.5V, SHDN = 0V, V
OUT
= 15V, MAX222/242
0.01
10
Output Leakage Current
V
CC
= SHDN = 0V, V
OUT
= 15V
0.01
10
A
200
116
Data Rate
kb/s
Transmitter Output Resistance
V
CC
= V+ = V- = 0V, V
OUT
= 2V
300
10M
Output Short-Circuit Current
V
OUT
= 0V
7
22
mA
RS-232 Input Voltage Operating Range
30
V
All except MAX243 R2
IN
0.8
1.3
RS-232 Input Threshold Low
V
CC
= 5V
MAX243 R2
IN
(Note 2)
-3
V
All except MAX243 R2
IN
1.8
2.4
RS-232 Input Threshold High
V
CC
= 5V
MAX243 R2
IN
(Note 2)
-0.5
-0.1
V
All except MAX243, V
CC
= 5V, no hysteresis in shdn.
0.2
0.5
1
RS-232 Input Hysteresis
MAX243
1
V
RS-232 Input Resistance
3
5
7
k
TTL/CMOS Output Voltage Low
I
OUT
= 3.2mA
0.2
0.4
V
TTL/CMOS Output Voltage High
I
OUT
= -1.0mA
3.5
V
CC
- 0.2
V
Sourcing V
OUT
= GND
-2
-10
mA
TTL/CMOS Output Short-Circuit Current
Shrinking V
OUT
= V
CC
10
30
V
5
8
Output Voltage Swing
All transmitter outputs loaded with 3k
to GND
RS-232 TRANSMITTERS
RS-232 RECEIVERS
2.4
MAX220: V
CC
= 5.0V
MAX220MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
_______________________________________________________________________________________
3
Note 3: MAX243 R2
OUT
is guaranteed to be low when R2
IN
is
0V or is floating.
ELECTRICAL CHARACTERISTICS--MAX220/222/232A/233A/242/243 (continued)
(V
CC
= +5V 10%, C1C4 = 0.1F, MAX220, C1 = 0.047F, C2C4 = 0.33F, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Operating Supply Voltage
SHDN Threshold High
4.5
5.5
V
MAX222/242
Transmitter-Output Enable Time
(SHDN goes high), Figure 4
2.0
1.4
V
MAX220
0.5
2
t
ET
No load
MAX222/232A/233A/242/243
4
10
MAX222/232A/233A/242/243
6
12
30
MAX220
12
V
CC
Supply Current (SHDN = V
CC
),
Figures 5, 6, 11, 19
3k
load
both inputs
MAX222/232A/233A/242/243
15
mA
Transition Slew Rate
T
A
= +25C
0.1
10
C
L
= 50pF to 2500pF,
R
L
= 3k
to 7k,
V
CC
= 5V, T
A
= +25C,
measured from +3V
to -3V or -3V to +3V
T
A
= 0C to +70C
CONDITIONS
2
50
MAX220
1.5
3
30
V/s
T
A
= -40C to +85C
2
50
MAX222/242, 0.1F caps
(includes charge-pump start-up)
Shutdown Supply Current
MAX222/242
T
A
= -55C to +125C
35
100
A
SHDN Input Leakage Current
MAX222/242
1
A
SHDN Threshold Low
MAX222/242
1.4
0.8
V
250
MAX222/232A/233A/242/243
1.3
3.5
s
t
PHLT
MAX220
4
10
Transmitter-Output Disable Time
(SHDN goes low), Figure 4
t
DT
MAX222/232A/233A/242/243
1.5
3.5
Transmitter Propagation Delay
TLL to RS-232 (normal operation),
Figure 1
t
PLHT
MAX220
5
10
s
V
2.0
1.4
MAX222/242, 0.1F caps
A
0.05
10
600
TTL/CMOS Output Leakage Current
EN Input Threshold High
MAX222/232A/233A/242/243
0.5
1
ns
t
PHLR
MAX220
0.6
3
t
PLHR
MAX222/232A/233A/242/243
0.6
1
Receiver Propagation Delay
RS-232 to TLL (normal operation),
Figure 2
t
PHLT
- t
PLHT
MAX220
0.8
3
s
MAX222/232A/233A/242/243
t
PHLS
MAX242
0.5
10
Receiver Propagation Delay
RS-232 to TLL (shutdown), Figure 2
t
PLHS
MAX242
2.5
10
s
Receiver-Output Enable Time, Figure 3 t
ER
MAX242
UNITS
MIN
TYP
MAX
125
500
PARAMETER
MAX242
ns
SHDN = V
CC
or EN = V
CC
(SHDN = 0V for MAX222),
0V
V
OUT
V
CC
Receiver-Output Disable Time, Figure 3 t
DR
MAX242
160
500
ns
300
ns
Transmitter + to - Propagation
Delay Difference (normal operation)
MAX220
2000
t
PHLR
- t
PLHR
MAX222/232A/233A/242/243
100
ns
Receiver + to - Propagation
Delay Difference (normal operation)
MAX220
225
V
1.4
0.8
EN Input Threshold Low
MAX242
MAX220MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
4
_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243
10
8
-10
0
5
15
25
OUTPUT VOLTAGE vs. LOAD CURRENT
-4
-6
-8
-2
6
4
2
MAX220-01
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
10
0
20
0.1
F
EITHER V+ OR V- LOADED
V
CC
= 5V
NO LOAD ON
TRANSMITTER OUTPUTS
(EXCEPT MAX220, MAX233A)
V- LOADED, NO LOAD ON V+
V+ LOADED, NO LOAD ON V-
1
F
1
F
0.1
F
11
10
4
0
10
40
60
AVAILABLE OUTPUT CURRENT
vs. DATA RATE
6
5
7
9
8
MAX220-02
DATA RATE (kbits/sec)
OUTPUT CURRENT (mA)
20
30
50
OUTPUT LOAD CURRENT
FLOWS FROM V+ TO V-
V
CC
= +5.25V
ALL CAPS
1
F
ALL CAPS
0.1
F
V
CC
= +4.75V
+10V
-10V
MAX222/MAX242
ON-TIME EXITING SHUTDOWN
+5V
+5V
0V
0V
MAX220-03
500
s/div
V+, V- VOLTAGE (V)
1
F CAPS
V+
V+
V-
V-
SHDN
0.1
F CAPS
1
F CAPS
0.1
F CAPS
MAX220MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
_______________________________________________________________________________________
5
V
CC
...........................................................................-0.3V to +6V
V+ ................................................................(V
CC
- 0.3V) to +14V
V- ............................................................................+0.3V to -14V
Input Voltages
T
IN
............................................................-0.3V to (V
CC
+ 0.3V)
R
IN
......................................................................................30V
Output Voltages
T
OUT
...................................................(V+ + 0.3V) to (V- - 0.3V)
R
OUT
.........................................................-0.3V to (V
CC
+ 0.3V)
Short-Circuit Duration, T
OUT
......................................Continuous
Continuous Power Dissipation (T
A
= +70C)
14-Pin Plastic DIP (derate 10.00mW/C above +70C)....800mW
16-Pin Plastic DIP (derate 10.53mW/C above +70C)....842mW
20-Pin Plastic DIP (derate 11.11mW/C above +70C)....889mW
24-Pin Narrow Plastic DIP
(derate 13.33mW/C above +70C) ..........1.07W
24-Pin Plastic DIP (derate 9.09mW/C above +70C)......500mW
16-Pin Wide SO (derate 9.52mW/C above +70C).........762mW
20-Pin Wide SO (derate 10 00mW/C above +70C).......800mW
24-Pin Wide SO (derate 11.76mW/C above +70C).......941mW
28-Pin Wide SO (derate 12.50mW/C above +70C) .............1W
44-Pin Plastic FP (derate 11.11mW/C above +70C) .....889mW
14-Pin CERDIP (derate 9.09mW/C above +70C) ..........727mW
16-Pin CERDIP (derate 10.00mW/C above +70C) ........800mW
20-Pin CERDIP (derate 11.11mW/C above +70C) ........889mW
24-Pin Narrow CERDIP
(derate 12.50mW/C above +70C) ..............1W
24-Pin Sidebraze (derate 20.0mW/C above +70C)..........1.6W
28-Pin SSOP (derate 9.52mW/C above +70C).............762mW
Operating Temperature Ranges
MAX2 _ _ C _ _......................................................0C to +70C
MAX2 _ _ E _ _ ...................................................-40C to +85C
MAX2 _ _ M _ _ ...............................................-55C to +125C
Storage Temperature Range .............................-65C to +160C
Lead Temperature (soldering, 10sec) .............................+300C
ABSOLUTE MAXIMUM RATINGS--MAX223/MAX230MAX241
ELECTRICAL CHARACTERISTICS--MAX223/MAX230MAX241
(MAX223/230/232/234/236/237/238/240/241, V
CC
= +5V 10; MAX233/MAX235, V
CC
= 5V 5%, C1C4 = 1.0F; MAX231/MAX239,
V
CC
= 5V 10%; V+ = 7.5V to 13.2V; T
A
= T
MIN
to T
MAX
; unless otherwise noted.)
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.
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage Swing
All transmitter outputs loaded with 3k
to ground
5.0
7.3
V
V
CC
Power-Supply Current
No load,
T
A
= +25C
5
10
mA
7
15
0.4
1
V+ Power-Supply Current
1.8
5
mA
5
15
Shutdown Supply Current
T
A
= +25C
15
50
V
Input Logic Threshold High
T
IN
2.0
EN, SHDN (MAX223);
EN, SHDN (MAX230/235/236/240/241)
2.4
Logic Pull-Up Current
T
IN
= 0V
1.5
200
Receiver Input Voltage
Operating Range
-30
30
V
A
A
1
10
V
Input Logic Threshold Low
T
IN
; EN, SHDN (MAX233); EN, SHDN (MAX230/235241)
0.8
MAX231/239
MAX223/230/234238/240/241
MAX232/233
PARAMETER
MAX239
MAX230/235/236/240/241
MAX231
MAX223
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