1µA Supply-Current, True +3V to +5.5V
RS-232 Transceivers with AutoShutdown
MAX3221/MAX3223/MAX3243
__________________________________________________Typical Operating Circuits
+3.3V
C5
C1
0.1µF
0.1µF
2 C1+
4 C1-
5
C2
0.1µF
6
C2+
C2-
T1OUT 13
C2
0.1µF
15
V
CC
V+
3
C3
0.1µF
7
C4
0.1µF
C1
0.1µF
+3.3V
0.1µF
28 C1+
24 C1-
1
9 R1OUT
R1IN 8
5kΩ
LOGIC
INPUTS
2
C2+
C2-
T1OUT 9
T2OUT 10
T3OUT 11
RS-232
OUTPUTS
26
V
CC
V+
27
C3
0.1µF
3
C4
0.1µF
MAX3221
V-
11 T1IN
MAX3243
V-
14 T1IN
13 T2IN
12 T3IN
20 R2OUTB
19 R1OUT
1 EN
INVALID 10
TO POWER
MANAGEMENT
UNIT
V
CC
12
FORCEON
GND
14
FORCEOFF 16
R1IN 4
5kΩ
+3.3V
C5
C1
0.1µF
0.1µF
2 C1+
4 C1-
5
C2
0.1µF
6
C2+
C2-
T1OUT 17
RS-232
OUTPUTS
15 R5OUT
23
15 R1OUT
TTL/CMOS
OUTPUTS
10 R2OUT
R1IN 16
5kΩ
R2IN
5kΩ
9
RS-232
INPUTS
V
CC
TO POWER
MANAGEMENT UNIT
22
FORCEON
FORCEOFF
GND
25
19
V
CC
V+
3
C3
0.1µF
7
C4
0.1µF
16 R4OUT
LOGIC
OUTPUTS
18 R2OUT
R2IN
5kΩ
5
17 R3OUT
R3IN 6
5kΩ
R4IN 7
5kΩ
R5IN 8
5kΩ
MAX3223
V-
RS-232
INPUTS
13 T1IN
TTL/CMOS
INPUTS
12 T2IN
T2OUT 8
21 INVALID
1 EN
INVALID 11
TO POWER
MANAGEMENT
UNIT
V
CC
14
FORCEON
GND
18
FORCEOFF 20
12
______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
