MAX3222/MAX3232/MAX3237/MAX3241
3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232
Transceivers Using Four 0.1µF External Capacitors
MAX3222-04
6
5
TRANSMITTER OUTPUT VOLTAGE (V)
4
3
2
1
0
-1
-2
-3
-4
-5
-6
0
1
2
3
4
5
6
7
LOAD CURRENT PER TRANSMITTER (mA)
V
CC
V
CC
= 3.0V
T1
V
OUT
+
V
OUT
+
T2
T3
V
OUT
-
V
OUT
-
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
1
C
2
2
14
13
V
CC
12
21
20
19
18
17
16
15
23
C1+
C1-
C2+
C2-
T1IN
T2IN
T3IN
R1OUTB
R2OUTB
R1OUT
R2OUT
R3OUT
R4OUT
R5OUT
EN
V+
MAX3241
V-
T1OUT 9
+V
T2OUT 10
+V
T3OUT
11
-V
GND
R1IN
5kΩ
5kΩ
5kΩ
5kΩ
5kΩ
SHDN
GND
25
R2IN
R3IN
R4IN
R5IN
4
5
6
7
MOUSE
8
22
Tx
Figure 4b. Mouse Driver Test Circuit
10
Maxim Integrated
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
