3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232
Transceivers Using Four 0.1µF External Capacitors
MAX3222/MAX3232/MAX3237/MAX3241
TRANSMITTER OUTPUT VOLTAGE (V)
4
3
2
1
0
-1
-2
-3
-4
-5
-6
0
V
CC
= 3.0V
T1
V
OUT
+
V
OUT
+
T2
V
CC
T3
V
OUT
-
V
OUT
-
1
2
3
4
5
6
7
LOAD CURRENT PER TRANSMITTER (mA)
Figure 4a. MAX3241 Transmitter Output Voltage vs. Load Current per Transmitter
V
CC
= 3V
to 5.5V
0.1µF
26
V
CC
27
C3
COMPUTER SERIAL PORT
3
C4
28
C
1
24
C1+
C1-
V+
C
2
1 C2+
2
C2-
14 T1IN
13 T2IN
MAX3241
V-
T1OUT 9
+V
T2OUT 10
+V
T3OUT 11
-V
GND
R1IN 4
5k
5k
5k
5k
5k
GND
25
R2IN 5
R3IN 6
R4IN 7
MOUSE
R5IN 8
SHDN 22
Tx
V
CC
12 T3IN
21
R1OUTB
20 R2OUTB
19 R1OUT
18 R2OUT
17 R3OUT
16 R4OUT
15 R5OUT
23
EN
Figure 4b. Mouse Driver Test Circuit
10
______________________________________________________________________________________
MAX3222-04
6
5