Datasheet

© 2006 Fairchild Semiconductor www.fairchildsemi.com
FMS6346 • Rev. 1.0.5 8
FMS6346 — Six Channel, 6th-Order SD/HD Video FIlter Driver
Typical Application Diagram
The following circuit may be used for direct DC-coupled drive by DACs with an output voltage range of 0V to 1.4V.
AC-coupled or DC-coupled outputs may be used with AC-coupled outputs offering slightly lower power dissipation.
Figure 20. Typical Application Diagram
75Ω
220µF
220µF
+5V
FMS6346
20L TSSOP
SD IN1
20
19
18
16, 17
14
13
12
1
2
3
4
5
7
8
0.1
µF
75Ω
75Ω
220µF
75Ω
75Ω Video Cables
75Ω
75Ω Video Cables
75Ω
Video
SoC
G/Y2
OUT
R/Pr
OUT
B/Pb
OUT
Y1
OUT
CV
OUT
C
OUT
DAC load resistors
AC-coupling caps
are optional
DVD Player or STB
Y1
C
CV
Y2/G
Pb/B
Pr/R
F
cSEL
6
SD IN2
SD IN3
N/C
SD OUT1
SD OUT2
SD OUT3
GND
Vcc
SD/HD IN1
SD/HD IN2
SD/HD OUT1
SD/HD OUT2
SD/HD OUT3SD/HD IN39
N/C
15
75Ω
75Ω
75Ω
220µF
220µF
220µF75Ω
75Ω
75Ω
10.0
µF
75Ω
220µF
220µF
+5V
FMS6346
20L TSSOP
SD IN1
20
19
18
16, 17
14
13
12
1
2
3
4
5
7
8
0.1
µF
75Ω
75Ω
220µF
75Ω
75Ω Video Cables
75Ω
75Ω Video Cables
75Ω
Video
SoC
G/Y2
OUT
R/Pr
OUT
B/Pb
OUT
Y1
OUT
CV
OUT
C
OUT
DAC load resistors
AC-coupling caps
are optional
DVD Player or STB
Y1
C
CV
Y2/G
Pb/B
Pr/R
F
cSEL
6
SD IN2
SD IN3
N/C
SD OUT1
SD OUT2
SD OUT3
GND
Vcc
SD/HD IN1
SD/HD IN2
SD/HD OUT1
SD/HD OUT2
SD/HD OUT3SD/HD IN39
N/C
15
75Ω
75Ω
75Ω
220µF
220µF
220µF75Ω
75Ω
75Ω
10.0
µF
The selection of the coupling capacitor is a function of the
subsequent circuit input impedance and the leakage cur-
rent of the input being driven. To obtain the highest quality
output video signal, the series termination resistor must be
placed as close to the output pin as possible. This reduces
the parasitic capacitance and inductance effect on the out-
put driver. The distance from the device pin to the series
termination resistor should be no greater than 0.1 inches.
Figure 21 Distance from Device Pin to Series
Termination Resistor