V
CC
+
+
26
0.1µF
0.1µF
C5
C1
VCC
28
27
3
C1+
V+
V-
+
+
0.1µF
0.1µF
C3
C4
24
1
C1-
C2+
SP3243EB
+
C2
0.1µF
2
14
13
C2-
T1IN
T1OUT
9
T2OUT
T3OUT
T2IN
T3IN
10
11
RS-232
OUTPUTS
TTL/CMOS
INPUTS
12
R2OUT
R1OUT
20
19
R1IN
R2IN
R3IN
R4IN
R5IN
4
5
6
7
8
5kΩ
R2OUT
R3OUT
R4OUT
R5OUT
18
17
16
15
5kΩ
TTL/CMOS
OUTPUTS
RS-232
INPUTS
5kΩ
5kΩ
5kΩ
V
CC
22
23
SHUTDOWN
ONLINE
To µP Supervisor
21
STATUS
Circuit
GND
25
Figure 15. SP3243EB Typical Operating Circuit
Date: 6/2/04
SP3223EB/3243EB +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
9