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BT856 Datasheet(PDF) 39 Page - List of Unclassifed Manufacturers

Part # BT856
Description  YCrCb or RGB to NTSC/PAL Digital Video Encoder
PDF  54 Pages
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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BT856 Datasheet(HTML) 39 Page - List of Unclassifed Manufacturers

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Brooktree®
34
PC BOARD CONSIDERATIONS
Power and Ground Planes
Bt856/7
Figure 15. Typical Connection Diagram and Parts List (External Voltage Reference)
Notes: 1. Values for 700 mV SCART
/PeriTV may be 20% higher when using RGB inputs.
2. Some modulators may require AC coupling capacitors (10
µF).
VAA
COMP
VREF_OUT
VREF_IN
GND
C7
C8
C2–C6
R5
Z1
FS ADJUST
RSET
75
CVBS/B
CVBS/G
Y/CVBS
C/R
Analog Power Plane
P
P
P
P
LPF
LPF
LPF
To Video
Connector
Ground
(Power Supply
Connector)
+5V (VCC)
VAA
Schottky Diodes
Schottky Diodes
RF Modulator
75
TRAP
RF
Modulator
LPF
22 pF
1.8
µH
270 pF
Bt856/7
C9
+
C1
L1
RF MODULATOR
RF
330 pF
GND
To Filter
DAC Output
22 pF
1.8
µH
270 pF
330 pF
Audio
82
ZIN = 1 K
(Note 1)
75
(Note 1)
75
75
(Note 1)
(Note 2)
Location
Description
Vendor Part Number
C1–C8
0.1
µF Ceramic Capacitor
Erie RPE112Z5U104M50V
C9
47
µF Capacitor
Mallory CSR13F476KM
L1
Ferrite Bead - Surface Mount
Fair-Rite 2743021447
R1
1 K
Ω 5% Resistor
RSET
1% Metal Film Resistor
Dale CMF-55C
Z1
1.235 V Voltage Reference
LM385BZ–1.2, LM4041-1.2
TRAP
Ceramic Resonator
Murata TPSx.xMJ or MB2 (where x.x =sound carrier frequency in MHz)
Schottky Diodes
BAT85 (BAT54F Dual) HP 5082-2305 (1N6263) Siemens BAT 64-04
(Dual)
The vendor numbers above are listed only as a guide. Substitution of devices with similar characteristics will not affect
the performance of the Bt856/7.



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