SP503AN Datasheet, PDF (7/13 Pages) Sipex Corporation – Application Note

SP503 Switching Configuration for V.35 Implementations
• Switches are Siliconix DG643DY analog switches.
• Solid-State Relays are AT&T, LH1514.
• Resistors are 1/8W, 1% tolerance.
• External Supplies necessary are: Vcc = +5V, V+ = +12V (for V+ on the DG643DY) and Vn = -5V.
+5V V+ V-
Drivers SP503CF
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
(pins 3 & 11)
(pins 4 & 10)
(pins 5 & 9)
RDEC1 & TDEC1
RDEC2 & TDEC2
RDEC3 & TDEC3
+12V
V-
12 5
V+ 8
42
6
11
13
1
16
3 ₁₅
79
10 14
V-
12 5
V+ 8
42
6
11
13
1
16
3 ₁₅
79
10 14
V-
+12V
Driver Outputs & Receiver Inputs
are in DTE mode.
200Ω
232Ω _-5V
107Ω
232Ω
200Ω
12 5
8 V+
24
6
11
13
1
16
15 ³
97
14 10
TxD (103)
A
to pin 12 of the 74LS11
+12V V-
B
74LS11
+12V ^{to V-}
TT (113)
12 5
V+ 8
42
200Ω
12 5
8 V+
24
A
6
11
13
to pin 12 of the 74LS11
1
74LS11
16
232Ω
-5V
107Ω
232Ω
6
11
13
B
1
16
+12V
V-
12 5
3 ₁₅
79
10 14
200Ω
15 ³
97
14 10
200Ω
8 V+
24
232Ω
6
-5V
11
107Ω
232Ω
13
1
16
A
200Ω
15 ³
97
14 10
B
74LS11 _{to pin 12 of the 74LS11}
74LS11 to pin 6 of the 74LS11
1
8
LH1514
6
50Ω
7
5
50Ω
120Ω
3
3
8
LH1514
6
50Ω
7
5
50Ω
120Ω
1
74LS11
to pin 6 of the 74LS11
1
8
LH1514
6
50Ω
7
5
50Ω
120Ω
3
A
RxD (104)
B
A
RxC (115)
B
A
TxCC (114)
B
+5V
16 74LS11 (3-Input AND Gate)
1
2 1/4
12
74LS11
13
8
+5V
16
3
4 1/4
6
74LS11
5
8
SP503AN
SP503 Application Note
7
© Copyright 2000 Sipex Corporation