19-4323; Rev 9; 4/00
+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.
These parts are especially useful in battery-powered sys-
tems, 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 appli-
cations where printed circuit board space is critical.
____________________________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)
MAX220–MAX249
________________________Applications
Portable Computers
Low-Power Modems
Interface Translation
Battery-Powered RS-232 Systems
Multidrop RS-232 Networks
PART
MAX220CPE
MAX220CSE
MAX220CWE
MAX220C/D
MAX220EPE
MAX220ESE
MAX220EWE
MAX220EJE
MAX220MJE
Ordering Information
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
16 Wide SO
Dice*
16 Plastic DIP
16 Narrow SO
16 Wide SO
16 CERDIP
16 CERDIP
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
Selection Table
Part
Number
MAX220
MAX222
MAX223 (MAX213)
MAX225
MAX230 (MAX200)
MAX231 (MAX201)
MAX232 (MAX202)
MAX232A
MAX233 (MAX203)
MAX233A
MAX234 (MAX204)
MAX235 (MAX205)
MAX236 (MAX206)
MAX237 (MAX207)
MAX238 (MAX208)
MAX239 (MAX209)
MAX240
MAX241 (MAX211)
MAX242
MAX243
MAX244
MAX245
MAX246
MAX247
MAX248
MAX249
Power
Supply
(V)
+5
+5
+5
+5
+5
+5 and
+7.5 to +13.2
+5
+5
+5
+5
+5
+5
+5
+5
+5
+5 and
+7.5 to +13.2
+5
+5
+5
+5
+5
+5
+5
+5
+5
+5
No. of
RS-232
Drivers/Rx
2/2
2/2
4/5
5/5
5/0
2/2
2/2
2/2
2/2
2/2
4/0
5/5
4/3
5/3
4/4
3/5
5/5
4/5
2/2
2/2
8/10
8/10
8/10
8/9
8/8
6/10
No. of
Ext. Caps
4
4
4
0
4
2
4
4
0
0
4
0
4
4
4
2
4
4
4
4
4
0
0
0
4
4
Nominal
Cap. Value
(µF)
4.7/10
0.1
1.0 (0.1)
—
1.0 (0.1)
1.0 (0.1)
1.0 (0.1)
0.1
—
—
1.0 (0.1)
—
1.0 (0.1)
1.0 (0.1)
1.0 (0.1)
1.0 (0.1)
1.0
1.0 (0.1)
0.1
0.1
1.0
—
—
—
1.0
1.0
SHDN
& Three-
State
No
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Yes
Yes
No
No
No
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Rx
Active in
SHDN
—
—
✔
✔
—
—
—
—
—
—
—
—
—
—
—
—
—
—
✔
—
—
✔
✔
✔
✔
✔
Data Rate
(kbps)
120
200
120
120
120
120
120 (64)
200
120
200
120
120
120
120
120
120
120
120
200
200
120
120
120
120
120
120
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
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
+5V-Powered, Multichannel RS-232
Drivers/Receivers
MAX220–MAX249
ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243
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
= +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, 10sec) .............................+300°C
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.
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.)
PARAMETER
RS-232 TRANSMITTERS
Output Voltage Swing
Input Logic Threshold Low
Input Logic Threshold High
Logic Pull-Up/lnput Current
Output Leakage Current
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
RS-232 Input Hysteresis
RS-232 Input Resistance
TTL/CMOS Output Voltage Low
TTL/CMOS Output Voltage High
TTL/CMOS Output Short-Circuit Current
I
OUT
= 3.2mA
I
OUT
= -1.0mA
Sourcing V
OUT
= GND
Shrinking V
OUT
= V
CC
3.5
-2
10
V
CC
= 5V
V
CC
= 5V
All except MAX243 R2
IN
MAX243 R2
IN
(Note 2)
All except MAX243 R2
IN
MAX243 R2
IN
(Note 2)
0.2
3
0.8
-3
1.8
-0.5
0.5
1
5
0.2
V
CC
- 0.2
-10
30
7
0.4
2.4
-0.1
1
1.3
±30
V
V
V
V
kΩ
V
V
mA
All except MAX220
MAX220: V
CC
= 5.0V
All except MAX220, normal operation
SHDN
= 0V, MAX222/242, shutdown, MAX220
V
CC
= 5.5V,
SHDN
= 0V, V
OUT
= ±15V, MAX222/242
V
CC
=
SHDN
= 0V, V
OUT
= ±15V
All except MAX220, normal operation
V
CC
= V+ = V- = 0V, V
OUT
= ±2V
V
OUT
= 0V
300
±7
2
2.4
5
±0.01
±0.01
±0.01
200
10M
±22
40
±1
±10
±10
116
All transmitter outputs loaded with 3kΩ to GND
±5
±8
1.4
1.4
0.8
V
V
V
µA
µA
kb/s
Ω
mA
CONDITIONS
MIN
TYP
MAX
UNITS
All except MAX243, V
CC
= 5V, no hysteresis in shdn.
MAX243
2
_______________________________________________________________________________________
+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.)
PARAMETER
TTL/CMOS Output Leakage Current
EN
Input Threshold Low
EN
Input Threshold High
Operating Supply Voltage
No load
V
CC
Supply Current (SHDN = V
CC
),
Figures 5, 6, 11, 19
3kΩ load
both inputs
MAX220
MAX222/232A/233A/242/243
MAX220
MAX222/232A/233A/242/243
T
A
= +25°C
Shutdown Supply Current
MAX222/242
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
MAX222/242
MAX222/242
MAX222/242
C
L
= 50pF to 2500pF,
MAX222/232A/233A/242/243
R
L
= 3kΩ to 7kΩ,
V
CC
= 5V, T
A
= +25°C,
measured from +3V MAX220
to -3V or -3V to +3V
MAX222/232A/233A/242/243
t
PHLT
MAX220
t
PLHT
t
PHLR
t
PLHR
t
PHLS
t
PLHS
MAX222/232A/233A/242/243
MAX220
MAX222/232A/233A/242/243
MAX220
MAX222/232A/233A/242/243
MAX220
MAX242
MAX242
MAX242
MAX242
MAX222/242, 0.1µF caps
(includes charge-pump start-up)
MAX222/242, 0.1µF caps
MAX222/232A/233A/242/243
MAX220
MAX222/232A/233A/242/243
MAX220
2.0
6
1.5
1.4
1.4
12
3
1.3
4
1.5
5
0.5
0.6
0.6
0.8
0.5
2.5
125
160
250
600
300
2000
100
225
30
V/µs
30
3.5
10
3.5
10
1
3
1
3
10
10
500
500
µs
ns
ns
µs
ns
ns
ns
µs
µs
CONDITIONS
SHDN
= V
CC
or
EN
= V
CC
(SHDN = 0V for MAX222),
0V
≤
V
OUT
≤
V
CC
MAX242
MAX242
2.0
4.5
0.5
4
12
15
0.1
2
2
35
10
50
50
100
±1
0.8
µA
V
V
µA
MIN
TYP
±0.05
1.4
1.4
5.5
2
10
mA
MAX
±10
0.8
UNITS
µA
V
V
V
MAX220–MAX249
Transition Slew Rate
Transmitter Propagation Delay
TLL to RS-232 (normal operation),
Figure 1
Receiver Propagation Delay
RS-232 to TLL (normal operation),
Figure 2
Receiver Propagation Delay
RS-232 to TLL (shutdown), Figure 2
Receiver-Output Enable Time, Figure 3 t
ER
Receiver-Output Disable Time, Figure 3 t
DR
Transmitter-Output Enable Time
(SHDN goes high), Figure 4
Transmitter-Output Disable Time
(SHDN goes low), Figure 4
Transmitter + to - Propagation
Delay Difference (normal operation)
Receiver + to - Propagation
Delay Difference (normal operation)
t
ET
t
DT
t
PHLT
- t
PLHT
t
PHLR
- t
PLHR
Note 3:
MAX243 R2
OUT
is guaranteed to be low when R2
IN
is
≥
0V or is floating.
_______________________________________________________________________________________
3
+5V-Powered, Multichannel RS-232
Drivers/Receivers
MAX220–MAX249
__________________________________________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-
V-
500µs/div
-10V
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 (kbits/sec)
4
_______________________________________________________________________________________
+5V-Powered, Multichannel RS-232
Drivers/Receivers
MAX220–MAX249
ABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241
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
= +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, 10sec) .............................+300°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.)
PARAMETER
Output Voltage Swing
V
CC
Power-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+ Power-Supply Current
Shutdown Supply Current
Input Logic Threshold Low
Input Logic Threshold High
Logic Pull-Up Current
Receiver Input Voltage
Operating Range
T
IN
; EN,
SHDN
(MAX233);
EN,
SHDN (MAX230/235–241)
T
IN
EN,
SHDN
(MAX223);
EN,
SHDN (MAX230/235/236/240/241)
T
IN
= 0V
_______________________________________________________________________________________
5
电源技术
