±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V,
Up to 1Mbps, True RS-232 Transceivers
Typical Operating Characteristics (continued)
(V
CC
= +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ and C
L
, T
A
= +25°C, unless otherwise noted.)
MAX3241E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
TRANSMITTER OUTPUT VOLTAGE (V)
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
0
MAX3237E to04
MAX3222E/MAX3232E/MAX3237E/MAX3241E
MAX3241E
SLEW RATE vs. LOAD CAPACITANCE
MAX3237E toc05
MAX3241E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
1 TRANSMITTER AT 250kbps
2 TRANSMITTERS AT 15.6kbps
250kbps
40
30
20kbps
20
10
0
120kbps
MAX3237E toc06
14
12
SLEW RATE (V/µs)
10
8
6
4
60
50
SUPPLY CURRENT (mA)
V
OUT+
1 TRANSMITTER AT 250kbps
2 TRANSMITTERS AT 15.6kbps
V
OUT-
1000
2000
3000
4000
5000
2
0
0
1000
2000
3000
4000
5000
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3237E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
0
MAX3237E toc07
MAX3237E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE (MBAUD = V
CC
)
1Mbps
TRANSMITTER OUTPUT VOLTAGE (V)
5.0
2.5
0
-2.5
-5.0
-7.5
2Mbps
1.5Mbps
1 TRANSMITTER AT FULL DATA RATE
4 TRANSMITTERS AT 1/16 DATA RATE
3kΩ + C
L
LOAD, EACH OUTPUT
2Mbps
1.5Mbps
SLEW RATE (V/µs)
MAX3237E toc08
MAX3237E
SLEW RATE vs. LOAD CAPACITANCE
(MBAUD = GND)
MAX3237E toc09
7.5
12
10
SR-
8
SR+
6
4
2
1 TRANSMITTER AT 250kbps
4 TRANSMITTERS AT 15.6kbps
ALL TRANSMITTERS LOADED
WITH 3kΩ + C
L
0
500
1000
1500
2000
2500
TRANSMITTER OUTPUT VOLTAGE (V)
V
OUT
+
FOR DATA RATES UP TO 250kbps
1 TRANSMITTER 250kbps
4 TRANSMITTERS 15.6kbps
ALL TRANSMITTERS LOADED
WITH 3kΩ + C
L
V
OUT-
500
1000
1500
2000
2500
3000
0
500
1000
1500
1Mbps
0
2000
3000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3237E
SLEW RATE vs. LOAD CAPACITANCE
(MBAUD = V
CC
)
MAX3237E toc10
MAX3237E
SUPPLY CURRENT vs. LOAD CAPACITANCE
WHEN TRANSMITTING DATA (MBAUD = GND)
MAX3237E toc11
60
SLEW RATE (V/µs)
50
40
30
20
10
0
0
500
1000
1500
-SLEW, 1Mbps
+SLEW, 1Mbps
-SLEW, 2Mbps
+SLEW, 2Mbps
250kbps
40
SUPPLY CURRENT (mA)
120kbps
20kbps
30
80
TRANSMITTER SKEW (ns)
60
20
1 TRANSMITTER AT 20kbps, 120kbps, 250kbps
4 TRANSMITTERS AT 15.6kbps
ALL TRANSMITTERS LOADED
WITH 3kΩ + C
L
0
500
1000
1500
2000
2500
3000
40
|t
PLH
-
t
PHL
|
1 TRANSMITTER AT 500kbps
4 TRANSMITTERS AT 1/16 DATA RATE
ALL TRANSMITTERS LOADED
WITH 3kΩ + C
L
0
500
1000
1500
2000
LOAD CAPACITANCE (pF)
1 TRANSMITTER AT FULL DATA RATE
4 TRANSMITTERS AT 1/16 DATA RATE
3kΩ + C
L
LOAD EACH OUTPUT
2000
10
20
0
LOAD CAPACITANCE (pF)
0
LOAD CAPACITANCE (pF)
_______________________________________________________________________________________
MAX3237E toc12
70
MAX3237E
TRANSMITTER SKEW vs. LOAD CAPACITANCE
(MBAUD = V
CC
)
100
50
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
