±15kV ESD-Prote c te d, 1µA, 3.0V to 5.5V, 250kbps ,
RS -2 3 2 Tra n s c e ive rs w it h Au t o S h u t d o w n
1E/MAX243
Typ ic a l Op e ra t in g Circ u it s
+3.3V
15
0.1µF
C
BYPASS
V
CC
3
7
2
C1+
V+
V-
C1
C3
0.1µF
4
5
6
0.1µF
C1-
+3.3V
0.1µF
BYPASS
E
MAX3221
26
C
C2+
C4
0.1µF
C2
0.1µF
V
CC
27
3
28
C1+
C2-
V+
C1
C3
0.1µF
0.1µF
24
1
11
9
T1IN
T1OUT 13
C1-
MAX3243E
C2+
V-
C4
0.1µF
C2
0.1µF
R1OUT
R1IN
5k
8
2
C2-
T1IN
T1OUT
9
14
TO POWER-
MANAGEMENT
UNIT
RS-232
OUTPUTS
T2IN
T3IN
LOGIC
INPUTS
T2OUT 10
13
12
EN
INVALID 10
1
11
T3OUT
FORCEOFF
FORCEON
16
12
V
CC
GND
14
R2OUTB
R1OUT
20
19
R1IN
4
5
+3.3V
0.1µF
19
5k
C
BYPASS
V
CC
R2OUT
R3OUT
R4OUT
R2IN
R3IN
R4IN
R5IN
3
2
18
17
16
C1+
V+
V-
C1
0.1µF
C3
0.1µF
5k
5k
4
5
6
C1-
LOGIC
OUTPUTS
MAX3223E
E
7
6
7
8
RS-232
INPUTS
C2+
C4
0.1µF
C2
0.1µF
C2-
13
12
T1IN
T1OUT 17
TTL/CMOS
INPUTS
RS-232
OUTPUTS
5k
5k
8
T2IN
T2OUT
R5OUT
15
23
16
15 R1OUT
10 R2OUT
R1IN
FORCEON
FORCEOFF
INVALID
TTL/CMOS
OUTPUTS
RS-232
INPUTS
22
21
5k
V
CC
R2IN
9
TO POWER-
MANAGEMENT UNIT
GND
25
5k
TO POWER-
MANAGEMENT
UNIT
EN
INVALID 11
1
FORCEOFF
FORCEON
20
14
V
CC
GND
18
______________________________________________________________________________________ 15
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
