SOUTHERN AVIONICS COMPANY
Model SA100 Dual
2-78
Theory of Operation, Radiobeacon
Figure 2-57. Serial Interface PWB Schematic
DO1
DO2
DO3
DO4
DO5
DO7
DO8
DI8
DI7
DI5
DI3
DATA UPDATE
DI4
DI6
DI8
DI7
DI6
DI5
DI1
DI2
DI3
DI4
SERIAL DATA INPUT
DI1
+50V
+5V
GND
DI2
DO6
SERIAL DATA OUTPUT
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+50V
+5V
+5V
+5V
+5V
+5V
NOTES 1. THIS DRAWING NO. SEP24300, REV. E. 2. TITLE: SERIAL INTERFACE PCB SCHEMATIC. 3. ASSEMBLY DWG. NO. SAP24300. 4. ALL RESISTORS IN OHMS, 1/4W, UNLESS NOTED. 5. ALL CAPACITORS IN uF, UNLESS NOTED. 6. CR10, R1-R8, AND R12 NOT USED.
Q2 1T344000
Q2 1T344000
JP2JP2
A1
1
DIN
9
A5
5
A4
4
R2/C2
10
GND
8
VT
11
R1
6
C1
7
D6
15
D7
14
+5V
16
A2
2
A3
3
D8
13
D9
12
U3
1U145027
U3
1U145027
CR1
1D400400
CR1
1D400400
CR7
1D400400
CR7
1D400400
JP1JP1
11 12 13
10
U6CU6C
R14 180K
R14 180K
IN1
1
IN2
2
IN3
3
IN4
4
IN5
5
IN6
6
IN7
7
IN8
8
GND
9
COM
10
OUT8
11
OUT7
12
OUT6
13
OUT5
14
OUT4
15
OUT3
16
OUT2
17
OUT1
18
U7
1U282300
U7
1U282300
CR4
1D400400
CR4
1D400400
CR12
1D414800
CR12
1D414800
CR6
1D400400
CR6
1D400400
CR13
1D414800
CR13
1D414800
CR11
1D414800
CR11
1D414800
C3 0.047
C3 0.047
3 4 5
6
U6BU6B
R9 10K
R9 10K
CR5
1D400400
CR5
1D400400
A1
1
A8/D8
9
A5
5
A4
4
A9/D9
10
GND
8
RS
11
A6/D6
6
A7/D7
7
DOUT
15
TE
14
+5V
16
A2
2
A3
3
RTC
13
CTC
12
U1
1U145026
U1
1U145026
R13 180K
R13 180K
+
C2 6.8
+
C2 6.8
R20 4.7K
R20 4.7K
R17 180K
R17 180K
C4 1.0
C4 1.0
C5 0.047
C5 0.047
R10 10K
R10 10K
CR9
1D473300
CR9
1D473300
A1
1
A8/D8
9
A5
5
A4
4
A9/D9
10
GND
8
RS
11
A6/D6
6
A7/D7
7
DOUT
15
TE
14
+5V
16
A2
2
A3
3
RTC
13
CTC
12
U2
1U145026
U2
1U145026
CR14
1D414800
CR14
1D414800
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)
C9 0.1
C9 0.1
C12 0.1
C12 0.1
C13 0.1
C13 0.1
C11 0.1
C11 0.1
1 2 8
9
14
7
U6A
1U402300
U6A
1U402300
R16 180K
R16 180K
C8 0.1
C8 0.1
R19 220K
R19 220K
R18 1M
R18 1M
R11 10K
R11 10K
Q1 1T371100
Q1 1T371100
CR3
1D400400
CR3
1D400400
A1
1
DIN
9
A5
5
A4
4
R2/C2
10
GND
8
VT
11
R1
6
C1
7
D6
15
D7
14
+5V
16
A2
2
A3
3
D8
13
D9
12
U4
1U145027
U4
1U145027
CR2
1D400400
CR2
1D400400
C10 0.1
C10 0.1
R22 47K
R22 47K
C6 1.0
C6 1.0
R15 10K
R15 10K
C7 0.1
C7 0.1
R21 10K
R21 10K
CR8
1D400400
CR8
1D400400
PI
11
RST
12
Q4
7
Q5
5
Q6
4
Q7
6
Q8
14
Q9
13
Q10
15
Q12
1
Q13
2
Q14
3
PO
9
PO
10
VDD
16
VSS
8
U5
1U406000
U5
1U406000
C1 0.01
C1 0.01
Summary of Contents for SA100
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