SP503AN Datasheet, PDF (11/13 Pages) Sipex Corporation – Application Note

Creating extra differential channels using the SP485
TDEC₂
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
TDEC₂
10
+5V
8
1µF
V_CC
22µF
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.
SP485
7
4
B6
25
DI
3
A
DE
1
RDEC₁
RO
2
5
(pin 3 of the SP503)
RE
SP503AN
SP503 Application Note
11
© Copyright 2000 Sipex Corporation