1ꢀ5k EꢁD-ꢂrotected, Down to 10nA, 3.0k to ꢀ.ꢀk,
Up to 1Mbps, True Rꢁ-232 Transceivers
Typical Operating Characteristics (continued)
(V
ꢁꢁ
= +3.3V, 2ꢀ05bps data rate, 0.1µF capacitors, all transmitters loaded with 35Ω and ꢁ , T = +2ꢀ°ꢁ, unless otherwise noted.)
L A
MAX3237E
SUPPLY CURRENT vs. LOAD CAPACITANCE
WHEN TRANSMITTING DATA (MBAUD = GND)
MAX3237E
SLEW RATE vs. LOAD CAPACITANCE
(MBAUD = GND)
MAX3237E
SLEW RATE vs. LOAD CAPACITANCE
(MBAUD = V
)
CC
50
12
10
70
60
50
40
30
20
250kbps
120kbps
40
30
20
10
0
-SLEW, 1Mbps
+SLEW, 1Mbps
-SLEW, 2Mbps
+SLEW, 2Mbps
SR-
SR+
8
20kbps
/MAX3246E
6
4
1 TRANSMITTER AT 20kbps, 120kbps, 250kbps
4 TRANSMITTERS AT 15.6kbps
ALL TRANSMITTERS LOADED
1 TRANSMITTER AT 250kbps
4 TRANSMITTERS AT 15.6kbps
ALL TRANSMITTERS LOADED
1 TRANSMITTER AT FULL DATA RATE
4 TRANSMITTERS AT 1/16 DATA RATE
2
0
10
0
3kΩ + C LOAD EACH OUTPUT
WITH 3kΩ + C
L
L
WITH 3kΩ + C
L
0
500
1000
1500
2000
0
500
1000 1500 2000 2500 3000
LOAD CAPACITANCE (pF)
0
500
1000 1500 2000 2500 3000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3237E
TRANSMITTER OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE (MBAUD = GND)
MAX3237E
MAX3237E SUPPLY CURRENT
vs. SUPPLY VOLTAGE (MBAUD = GND)
TRANSMITTER SKEW vs. LOAD CAPACITANCE
(MBAUD = V
)
CC
100
50
6
5
V
+
OUT
4
80
60
40
20
0
40
30
3
2
1 TRANSMITTER AT 250kbps
4 TRANSMITTERS AT 15.6kbps
ALL TRANSMITTERS LOADED
WITH 3kΩ + 1000pF
1
0
-1
-2
-3
-4
-5
-6
20
1 TRANSMITTER AT 250kbps
4 TRANSMITTERS AT 15.6kbps
ALL TRANSMITTERS LOADED
WITH 3kΩ AND 1000pF
|tPLH - t
|
PHL
1 TRANSMITTER AT 500kbps
4 TRANSMITTERS AT 1/16 DATA RATE
ALL TRANSMITTERS LOADED
10
0
V
OUT-
4.5
WITH 3kΩ + C
L
0
500
1000
1500
2000
2.0
2.5
3.0
3.5
4.0
4.5
5.0
2.0
2.5
3.0
3.5
4.0
5.0
LOAD CAPACITANCE (pF)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
MAX3246E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3246E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3246E
SLEW RATE vs. LOAD CAPACITANCE
60
55
50
45
40
35
30
25
20
15
10
5
7
6
5
4
3
2
1
0
16
14
1 TRANSMITTER AT 250kbps
2 TRANSMITTERS AT 15.6kbps
V
OUT+
1 TRANSMITTER AT 250kbps
2 TRANSMITTERS AT 15.6kbps
12
250kbps
120kbps
SR-
SR+
10
8
-1
-2
-3
-4
-5
-6
20kbps
6
4
V
OUT-
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)
7/MAX3241E
6
_______________________________________________________________________________________