3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232
Transceivers Using Four 0.1µF External Capacitors
_____________________________________Typical Operating Circuits (continued)
0.1µF
+3.3V
26
26
0.1µF
0.1µF
0.1µF
V
V
CC
CC
27
4
28
27
3
28
C1+
C1+
V+
V-
V+
0.1µF
0.1µF
0.1µF
0.1µF
C3*
25
1
24
1
C1-
C2+
C1-
C2+
0.1µF
MAX3237
MAX3241
V-
C4
0.1µF
3
2
C2-
C2-
T1IN
T1IN
T1OUT
T2OUT
T3OUT
5
6
7
24
T1OUT
9
14
13
T1
T2
T2IN
T3IN
T2IN
23
22
T2OUT 10
TTL/CMOS
INPUTS
RS-232
OUTPUTS
T3IN
RS-232
OUTPUTS
11
12
21
LOGIC
INPUTS
T3OUT
R1IN
T3
T4
T5
R1OUTB
T4IN
T5IN
T4OUT 10
19
17
R2OUTB
R1OUT
20
19
12
T5OUT
4
5
R1OUTB
R1OUT
16
21
5kΩ
R2OUT
R3OUT
R4OUT
R2IN
18
17
16
R1IN
5kΩ
8
9
R1
R2
R3
5kΩ
TTL/CMOS
OUTPUTS
6
7
8
R3IN
RS-232
INPUTS
RS-232
INPUTS
R2OUT
R3OUT
R2IN
20
18
LOGIC
5kΩ
OUTPUTS
5kΩ
R4IN
11
R3IN
5kΩ
5kΩ
R5OUT
EN
15
23
R5IN
15
14
5kΩ
MBAUD
SHDN
EN
13
22
SHDN
GND
2
GND
25
* C3 CAN BE RETURNED TO EITHER V OR GROUND.
* C3 CAN BE RETURNED TO EITHER V OR GROUND.
CC
CC
______________________________________________________________________________________ 13
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
