SP503AN Datasheet, PDF (10/13 Pages) Sipex Corporation – Application Note

Creating extra RS-232 channels using the SP310A
1N5819
+5V
22µF 22µF
SP503CF
Drivers
22µF
25
V_CC
TxD
14
DTR
13
RTS
16
TxC
15
ST
22
RL
17
LL
24
Receivers
RxD
1
RxC
20
CTS
80
DSR
78
DCD
19
RI
21
SCT
79
27 26 30 28 31 ₃₂
V_DD
C1-
C1+ C2+
C2- V_SS
61
59
58
56
54
52
63
65
42
44
47
45
51
49
70
71
37
38
66
67
68
69
35
36
39
40
76
77
22µF
RDEC₁
RDEC₁
(Pin 3 of
the SP503)
3
+5V
0.1µF 0.1µF 0.1µF
SP310ACT
17 3 2 4 5 6
18
V_CC V+C1+ C1-C2+
ON/OFF
C2-
V-
7
12
15
0.1µF
1
7
2
14
20
23
4
19
24
11
21
18
3
16
17
9
5
13
6
8
10
22
15
12
DB-25 connector in
DTE configuration.
11
8
TM
14
25
13
10
9
SP503AN
SP503 Application Note
10
© Copyright 2000 Sipex Corporation