mc1377 Freescale Semiconductor, Inc, mc1377 Datasheet - Page 11

• Manufacturer Part Number: mc1377
• Description: Color Television Rgb To Pal/ntsc Encoder
• Manufacturer: Freescale Semiconductor, Inc

Power Supplies
10 V to 14 Vdc power supply. Device current into Pin 14 with
open output is typically 35 mA. To provide a stable reference
for the ramp generator and the video output, a high quality
8.2 V regulator can supply up to 10 mA for external uses,
MOTOROLA ANALOG IC DEVICE DATA
The MC1377 is designed to operate from an unregulated
Figure 14. Optional Chroma Coupling Circuits
3.58MHz
a) Insertion Loss: 3.0 dB
a)
a)
b) Insertion Loss: 9.0 dB
b)
b)
10
13
13
0.1
Bandwidth: 1.0 MHz
Delay: 100 ns
Bandwidth: 2.0 MHz
Delay: 0
0.001
56pF
+12Vdc
5–25
47
Color Bandpass
Transformer (Fig. 24)
3.3k B
100
G
R
S
1.0k
1.0k
220
220
15
15
15
0.001
+
22 H
0.1
220
4.7k
+
+
+
0.1
17
18
2
3
4
5
10
13
14
11 12 19 15 7
0.1
MC1377
.01
47k
Figure 16. Application with VHF Modulator
27pF
39pF
20
16
1
9
8
6
.01
0.001
0.001
Delay Line
53k
8.2V Ref
1.2k
PAL
10
10
0.001
mica
NTSC
MC1377
1.2k
0.1
2.7k
V CC
Video
Out
6.8k
with an effective source impedance of less than 1.0 . This
regulator is convenient for a tracking dc reference for dc
coupling the output to an RF modulator. Typical turn–on drift
for the regulator is approximately –30 mV over 1 to 2 minutes
in otherwise stable ambient conditions.
application and basis of circuit choices for the MC1377. A
complete MC1377 application with the MC1374 VHF
modulator is illustrated in Figure 17. The internal schematic
diagram of the MC1377 is provided in Figure 8.
75
The preceding information was intended to detail the
470
0.001
120
47
MC1377
+
Audio
2.2k
In
0.001
4.7k
10 H
1.0
470
Figure 15. Output Termination
470
1
3
2
11
14
6
0.12 H
5
56
MC1374
Output
9
7
10
4
SUMMARY
+12Vdc
8
9
12
13
75
22
75
5.1k
0.33 H
75 Cable
47
0.33 H
Monitor
22
0.001
75
RF
Out
11