3.0V to 5.5V, Low -Pow e r, up to 1Mbps , True RS-232
Tra ns c e ive rs Us ing Four 0.1µF Exte rna l Ca pa c itors
7/MAX3241
_____________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V = +3.3V, 235kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ, T = +25°C, unless otherwise noted.)
CC
A
MAX3241
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3241
SLEW RATE
vs. LOAD CAPACITANCE
MAX3241
SUPPLY CURRENT vs. LOAD
CAPACITANCE WHEN TRANSMITTING DATA
7.5
24
22
45
40
35
30
235kbps
V
+
OUT
5.0
2.5
0
20
18
16
120kbps
20kbps
-SLEW
+SLEW
1 TRANSMITTER AT 235kbps
2 TRANSMITTERS AT 30kbps
25
20
15
10
5
14
12
10
-2.5
-5.0
-7.5
V
OUT
-
8
ALL OUTPUTS LOADED WITH 3kΩ +C
0.1µF CHARGE-PUMP CAPACITORS
FOR ALL DATA RATES UP TO 235kbps
L
6
4
0
0
1000
2000
3000 4000
5000
0
1000
2000
3000 4000
5000
0
1000
2000
3000 4000
5000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3237
MAX3237
MAX3237
SLEW RATE vs. LOAD CAPACITANCE
(MBAUD = GND)
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE (MBAUD = GND)
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE (MBAUD = V
)
CC
7.5
5.0
2.5
0
12
7.5
1Mbps
10
8
-SLEW
+SLEW
5.0
2.5
0
2Mbps
1.5Mbps
1 TRANSMITTER AT 240kbps
4 TRANSMITTERS AT 15kbps
1 TRANSMITTER AT FULL DATA RATE
4 TRANSMITTERS AT 1/16 DATA RATE
6
4
3kΩ + C LOADS
L
3kΩ + C LOAD, EACH OUTPUT
L
V
CC
= 3.3V
V
CC
= 3.3V
-2.5
-5.0
-7.5
-2.5
-5.0
-7.5
1 TRANSMITTER AT 240kbps
4 TRANSMITTERS AT 15kbps
3kΩ + C LOADS
1.5Mbps
1Mbps
2Mbps
2
0
L
V
CC
= 3.3V
0
1000
2000
3000 4000
5000
0
1000
2000
3000 4000
5000
0
500
1000
1500
2000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3237
SUPPLY CURRENT vs.
LOAD CAPACITANCE (MBAUD = GND)
MAX3237
MAX3237
SLEW RATE vs. LOAD CAPACITANCE
(MBAUD = V
SKEW vs. LOAD CAPACITANCE
(t - t
)
CC
)
PLH PHL
60
50
40
30
70
60
50
40
30
20
70
1 TRANSMITTER AT 512kbps
4 TRANSMITTERS AT 32kbps
60
50
3kΩ + C LOADS
240kbps
120kbps
L
-SLEW, 1Mbps
+SLEW, 1Mbps
-SLEW, 2Mbps
+SLEW, 2Mbps
V
CC
= 3.3V
MBAUD = V
CC
MAX
40
30
AVERAGE; 10 PARTS
20kbps
20
20
10
1 TRANSMITTER AT FULL DATA RATE
4 TRANSMITTERS AT 1/16 DATA RATE
1 TRANSMITTER AT FULL DATA RATE
4 TRANSMITTERS AT 1/16 DATA RATE
3kΩ + C LOAD EACH OUTPUT
10
0
10
0
3kΩ + C LOADS
L
MIN
L
V
CC
= 3.3V
V
CC
= 3.3V
0
0
1000
2000
3000 4000
5000
0
500
1000
1500
2000
0
500
1000
1500 2000
2500
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
