+5V-Powered, Multichannel RS-232
Drivers/Receivers
__________________________________________Typical Operating Characteristics
MAX223/MAX230–MAX241
TRANSMITTER OUTPUT VOLTAGE (V
vs. LOAD CAPACITANCE AT
DIFFERENT DATA RATES
)
OH
TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE
TRANSMITTER OUTPUT
VOLTAGE (V ) vs. V
OH
CC
8.5
8.0
7.5
7.0
6.5
12.0
11.0
10.0
9.0
7.4
7.2
7.0
6.8
6.6
6.4
6.2
6.0
1 TRANSMITTER LOADED
T
= +25°C
CC
A
V
2 TRANSMITTERS
LOADED
= +5V
LOADED, R = 3kΩ
L
C1–C4 = 1µF
1 TRANSMITTER
LOADED
2 TRANSMITTERS
LOADED
160kbits/sec
80kbits/sec
20kbits/sec
3 TRANS-
MITTERS
LOADED
8.0
7.0
T
= +25°C
T = +25°C
A
A
3 TRANSMITTERS
LOADED
6.0
C1–C4 = 1µF
TRANSMITTER
LOADS =
V
= +5V
CC
3 TRANSMITTERS LOADED
4 TRANSMITTERS
LOADED
5.0
4.0
R = 3kΩ
L
4 TRANSMITTERS
LOADED
3kΩ || 2500pF
C1–C4 = 1µF
4.5
5.0
5.5
0
500
1000
1500
2000
2500
0
500
1000
1500
2000
2500
V
(V)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
CC
TRANSMITTER OUTPUT VOLTAGE (V
vs. LOAD CAPACITANCE AT
DIFFERENT DATA RATES
)
OL
TRANSMITTER OUTPUT
VOLTAGE (V ) vs. V
TRANSMITTER OUTPUT VOLTAGE (V+, V-)
vs. LOAD CURRENT
OL
CC
10
8
-6.0
-6.2
-6.4
-6.6
-6.8
-7.0
-7.2
-7.4
-7.6
-6.0
-6.5
4 TRANS-
MITTERS
LOADED
T
= +25°C
A
T
= +25°C
CC
A
V
C1–C4 = 1µF
TRANSMITTER
LOADS =
= +5V
6
3 TRANSMITTERS LOADED
T
= +25°C
CC
A
V
R = 3kΩ
= +5V
L
4
3kΩ || 2500pF
C1–C4 = 1µF
-7.0
-7.5
-8.0
-8.5
-9.0
C1–C4 = 1µF
2
V- LOADED,
NO LOAD
ON V+
V+ AND V-
EQUALLY
LOADED
V+ LOADED,
NO LOAD
ON V-
160kbits/sec
80kbits/sec
20Kkbits/sec
0
1 TRANS-
-2
-4
-6
MITTER
LOADED
3 TRANS-
MITTERS
LOADED
2 TRANS-
MITTERS
LOADED
-8
ALL TRANSMITTERS UNLOADED
-10
0
5
10 15 20 25 30 35 40 45 50
CURRENT (mA)
0
500
1000
1500
2000
2500
4.5
5.0
5.5
LOAD CAPACITANCE (pF)
V
(V)
CC
V+, V- WHEN EXITING SHUTDOWN
(1µF CAPACITORS)
MAX220-13
V+
O
V-
SHDN*
500ms/div
*SHUTDOWN POLARITY IS REVERSED
FOR NON MAX241 PARTS
_______________________________________________________________________________________
7
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
