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PDF BA7242 Data sheet ( Hoja de datos )
| Número de pieza | BA7242 | |
| Descripción | Color TV signal encoder | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de BA7242 (archivo pdf) en la parte inferior de esta página. Total 5 Páginas | ||
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Multimedia ICs
Color TV signal encoder
BA7242F
The BA7242F is an IC which converts analog RGB signals to NTSC and PAL color TV signals. In addition to com-
posite output, luminance output, chrominance output, and analog RGB output are available. Each type of output is
equipped with an internal 75Ω driver.
•Applications
TV peripheral devices
•Features
1) Supports both NTSC and PAL systems.
2) Internal flip-flop circuit for PAL common mode
switching
3) Equipped with Y / C separated output pin.
4) Internal 75Ω driver
5) Supports subcarrier pulse for color input
•Block diagram
BIN 1
CLAMP
GIN 2
BFP
CLAMP
RIN
VCC1
BFP
3 CLAMP
BFP
4
SYNC 5
BFP 6
GND1 7
14 VCC2
13 YOUT
12 VOUT
11 GND2
10 COUT
9 NT / PAL
8 SCIN
1
1 page  
Multimedia ICs
•Application example (When using NTSC color TV signal)
Analog B signal
0.1µ
Analog G signal
0.1µ
Analog R signal
0.1µ
VCC
1 CLAMP
BFP
2 CLAMP
BFP
3 CLAMP
BFP
4
Composite SYNC
5
Burst flag pulse
(BFP)
6
7
BA7242F
VCC
14
13
+
12
75
220µ
Color TV signal output
11
10
VCC
9
0.1µ
8
560
4.7k
Color subcarrier
•Operation notes
(1) Since analog RGB signals perform clamping at the
input pin, input them with a low impedance.
(2) Input a signal of duty 50% for the color subcarrier. If
the duty fluctuates, it will affect the chroma phase.
Furthermore, for the application example, a voltage-
dividing resistor is assumed for the CMOS input of 5VP-P.
For other input formats, regulate the SCIN pin for
0.5VP-P.
(3) Input the composite SYNC and burst flag pulse
according to the standard value. If the timing is off, the
TV receiver may not show any color. As well, set the
input level the same as the TTL level. The input imped-
ance is 8kΩ.
•External dimensions (Units: mm)
8.7 ± 0.2
14 8
1
1.27
7
0.4 ± 0.1 0.3Min.
SOP14
0.15
5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet BA7242.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| BA7242 | Color TV signal encoder | ROHM Semiconductor |
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