SOUTHERN AVIONICS COMPANY
Model SA100 Dual2-24 Theory of Operation, Radiobeacon
Figure 2-14. Coder Shift Register Schematic
CODE TRAIN OUTPUT 5V
LOAD / SHIFT 5V
CLOCK 5V
CODE TRAIN EXT 5V
+12V
CODE TRAIN OUTPUT
CLOCK
LOAD / SHIFT
+5V
GND
CODE TRAIN EXT
+5V
+12V
+5V
+12V
+12V +5V
+5V +5V +5V +5V +5V +5V
NOTES
1. THIS DRAWING NO. SEP09701 REV. E.
2. TITLE: CODER SHIFT REGISTER PCB SCHEMATIC.
3. ASSEMBLY DWG. NO. SAP09701.
4. ALL RESISTORS 1/4W, 5%, UNLESS NOTED.
5. ALL CAPACITORS IN uF, UNLESS NOTED.
R10
100K
R10
100K
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
U6
9S902001
U6
9S902001
SER
10
A
11
B
12
C
13
D
14
E
3
F
4
G
5
H
6
CLK
2
INH
15
SH/LD
1
QH
9
QH
7
VCC
16
GND
8
U13
1U741651
U13
1U741651
+12V
1
+5V
3
VSS
2
U19
1U780500
U19
1U780500
TP2
+5V
TP2
+5V
SER
10
A
11
B
12
C
13
D
14
E
3
F
4
G
5
H
6
CLK
2
INH
15
SH/LD
1
QH
9
QH
7
VCC
16
GND
8
U16
1U741651
U16
1U741651
1 2
3
4
5
6
7
8
U10
220K
U10
220K
R7
220K
R7
220K
1 2
3
4
5
6
7
8
U9
220K
U9
220K
1 2
3
4
5
6
7
8
U7
220K
U7
220K
R9
100K
R9
100K
C13
0.1
C13
0.1
R13
10K
R13
10K
C5
0.1
C5
0.1
R11
100K
R11
100K
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
U5
9S902001
U5
9S902001
SER
10
A
11
B
12
C
13
D
14
E
3
F
4
G
5
H
6
CLK
2
INH
15
SH/LD
1
QH
9
QH
7
VCC
16
GND
8
U18
1U741651
U18
1U741651
R14
10K
R14
10K
C12
0.1
C12
0.1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
P1
GOLD FINGERS (22X)
P1
GOLD FINGERS (22X)
C7
1.0
C7
1.0
C3
1.0
C3
1.0
R1
100K
R1
100K
C9
0.1
C9
0.1
R5
220K
R5
220K
R4
220K
R4
220K
SER
10
A
11
B
12
C
13
D
14
E
3
F
4
G
5
H
6
CLK
2
INH
15
SH/LD
1
QH
9
QH
7
VCC
16
GND
8
U15
1U741651
U15
1U741651
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
U1
9S902001
U1
9S902001
C4
0.1
C4
0.1
TP3
CODE TRAIN OUT
TP3
CODE TRAIN OUT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
U4
9S902001
U4
9S902001
C6
0.1
C6
0.1
R2
220K
R2
220K
1 2
3
4
5
6
7
8
U11
220K
U11
220K
AI
3
BI
5
CI
7
DI
9
EI
11
FI
14
MODE
13
AO
2
BO
4
CO
6
DO
10
EO
12
FO
15
VDD
16
VCC
1
VSS
8
U21
1U450400
U21
1U450400
C11
0.1
C11
0.1
TP4
LOAD SHIFT
TP4
LOAD SHIFT
+
C1
6.8
35V
+
C1
6.8
35V
SER
10
A
11
B
12
C
13
D
14
E
3
F
4
G
5
H
6
CLK
2
INH
15
SH/LD
1
QH
9
QH
7
VCC
16
GND
8
U17
1U741651
U17
1U741651
R8
100K
R8
100K
R3
220K
R3
220K
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
U3
9S902001
U3
9S902001
TP1
GND
TP1
GND
1 2
3
4
5
6
7
8
U12
220K
U12
220K
1 2
3
4
5
6
7
8
U8
220K
U8
220K
AI
3
BI
5
CI
7
DI
9
EI
11
FI
14
MODE
13
AO
2
BO
4
CO
6
DO
10
EO
12
FO
15
VDD
16
VCC
1
VSS
8
U20
1U450400
U20
1U450400
C8
0.1
C8
0.1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
U2
9S902001
U2
9S902001
SER
10
A
11
B
12
C
13
D
14
E
3
F
4
G
5
H
6
CLK
2
INH
15
SH/LD
1
QH
9
QH
7
VCC
16
GND
8
U14
1U741651
U14
1U741651
R15
100K
R15
100K
R12
10K
R12
10K
R6
220K
R6
220K
C10
0.1
C10
0.1
TP5
8 PBS CLK
TP5
8 PBS CLK
C2
0.001
C2
0.001
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