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Fairchild Semiconductor Electronic Components Datasheet

FMS6246 Datasheet

6th Order SD/PS Video Filter Driver

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FMS6246 pdf
July 2005
FMS6246
Six Channel, 6th Order SD/PS Video Filter Driver
Features
Description
Three selectable sixth-order 8/15MHz (SD/PS) filters
Three fixed sixth-order 8MHz (SD) filters
Transparent input clamping
Single video load drive (2Vpp, 150, AV = 6dB)
AC or DC-coupled inputs
AC or DC-coupled outputs
DC-coupled outputs eliminate AC-coupling capacitors
Low Power
5V only
Robust (12kV HBM) output ESD protection
Lead (Pb) Free packages- TSSOP-20
Applications
Cable and Satellite set top boxes
DVD players
HDTV
Personal Video Recorders (PVR)
Video On Demand (VOD)
The FMS6246 Low Cost Video Filter (LCVF) is intended to
replace passive LC filters and drivers with a low-cost integrated
device. Six 6th order Butterworth filters provide improved image
quality compared to typical passive solutions. The combination
of low power Standard Definition (SD) and Progressive Scan
(PS) filters greatly simplify DVD video output circuitry. Three
channels offer fixed SD filters while the other three are select-
able between SD and PS filters.
The FMS6246 offers a fixed gain of 6dB. A metal option is avail-
able that provides a fixed gain of 9dB, offering even more flexi-
bility.
The FMS6246 may be directly driven by a DC-coupled DAC out-
put or an AC-coupled signal. Internal diode clamps and bias cir-
cuitry may be used if AC-coupled inputs are required (see
applications section for details).
The outputs can drive AC or DC-coupled single (150) video
loads. DC-coupling the outputs removes the need for output
coupling capacitors. The input DC levels will be offset approxi-
mately +280mV at the output.
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Block Diagram
SD IN1
SD IN2
SD IN3
SD/PS IN1
Transparent Clamp
6dB
Transparent Clamp
6dB
Transparent Clamp
8MHz, 6th order
6dB
Transparent Clamp
6dB
SD/PS IN2
Transparent Clamp
6dB
SD/PS IN3
Transparent Clamp
FcSEL SD / PS
Selectable
8/15 MHz
6th order
6dB
SD OUT1
SD OUT2
SD OUT3
SD/PS OUT1
SD/PS OUT2
SD/PS OUT3
©2004 Fairchild Semiconductor Corporation
FMS6246 Rev. 1A
1
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

FMS6246 Datasheet

6th Order SD/PS Video Filter Driver

No Preview Available !

FMS6246 pdf
Pin Configuration
SD IN1 1
SD IN2 2
SD IN3 3
N/C 4
Vcc 5
FcSEL 6
SD/PS IN1 7
SD/PS IN2 8
SD/PS IN3 9
N/C 10
FAIRCHILD
FMS6246
20L TSSOP
Pin Assignments
20 SD OUT1
19 SD OUT2
18 SD OUT3
17 Gnd
16 Gnd
15 N/C
14 SD/PS OUT1
13 SD/PS OUT2
12 SD/PS OUT3
11 N/C
Pin# Pin
Type
Description
1
SD IN1
Input SD video input, channel 1
2
SD IN2
Input SD video input, channel 2
3
SD IN3
Input SD video input, channel 3
4 N/C Input No Connect
5 Vcc Input +5V supply
6
FcSEL
Input Selects filter corner frequency for pins 7, 8,
and 9. “0” = SD, “1” = HD
7 SD/PS IN1 Input Selectable SD or PS video input, channel 1
8 SD/PS IN2 Input Selectable SD or PS video input, channel 2
9 SD/PS IN3 Input Selectable SD or PS video input, channel 3
10 N/C Input No Connect
11 N/C Input No Connect
12 SD/PS OUT3 Output Filtered SD or PS video output, channel 3
13 SD/PS OUT2 Output Filtered SD or PS video output, channel 2
14 SD/PS OUT1 Output Filtered SD or PS video output, channel 1
15 N/C Input No Connect
16 Gnd Input Must be tied to Ground
17 Gnd Input Must be tied to Ground
18 SD OUT3 Output Filtered SD video output, channel 3
19 SD OUT2 Output Filtered SD video output, channel 2
20 SD OUT1 Output Filtered SD video output, channel 1
FMS6246 Rev. 1A
2 www.fairchildsemi.com


Part Number FMS6246
Description 6th Order SD/PS Video Filter Driver
Maker Fairchild Semiconductor
Total Page 10 Pages
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