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PDF FMS6346 Data sheet ( Hoja de datos )
| Número de pieza | FMS6346 | |
| Descripción | 6th Order SD/HD Video Filter Driver | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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March 2006
FMS6346
Six Channel, 6th Order SD/HD Video Filter Driver
Features
■ Three selectable sixth-order 8/32MHz (SD/HD) filters
■ Three fixed sixth-order 8MHz (SD) filters
■ Transparent input clamping
■ Single video load drive (2Vpp, 150Ω, 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)
Block Diagram
Description
The FMS6346 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 High Definition (HD)
filters greatly simplify DVD video output circuitry. Three channels
offer fixed SD filters while the other three are selectable
between SD and HD filters.
The FMS6346 offers a fixed gain of 6dB. A metal option is available
that provides a fixed gain of 9dB, offering even more flexibility.
The FMS6346 may be directly driven by a DC-coupled DAC output
or an AC-coupled signal. Internal diode clamps and bias circuitry
may be used if AC-coupled inputs are required (see applications
section for details).
The outputs can drive AC or DC-coupled single (150Ω) 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.
SD IN1
SD IN2
SD IN3
SD/HD IN1
Transparent Clamp
6dB
Transparent Clamp
6dB
Transparent Clamp
8MHz, 6th order
6dB
Transparent Clamp
6dB
SD OUT1
SD OUT2
SD OUT3
SD/HD OUT1
SD/HD IN2
Transparent Clamp
6dB SD/HD OUT2
SD/HD IN3
Transparent Clamp
SD/HD
Selectable
8/32MHz
6th order
6dB
SD/HD OUT3
FMS6346 Rev. 1B
1 www.fairchildsemi.com
1 page  
Typical Performance Characteristics
Tc = 25˚C, Vin = 1Vpp, VCC = 5V, Rsource = 37.5Ω, inputs AC coupled with 0.1µF, all outputs AC coupled with
220µF into 150Ω loads; unless otherwise noted.
Figure 7. SD Differential Gain
1.0
NTSC
Figure 8. HD Differential Phase
1.0
NTSC
0.5 0
0
Min = 0.05
Max = 0.59
ppmax = 0.63
-1.0
1st 2nd 3rd 4th 5th 6th
-1.0
Min = 0.00
Max = 1.00
ppmax = 1.00
-2.0
1st 2nd 3rd 4th 5th 6th
FMS6346 Rev. 1B
5 www.fairchildsemi.com
5 Page 
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is
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DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TOANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOTASSUMEANY LIABILITY
ARISING OUT OF THEAPPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT
CONVEYANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTENAPPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
1. Life support devices or systems are devices or
2. A critical component is any component of a life
systems which, (a) are intended for surgical implant into
support device or system whose failure to perform can
the body, or (b) support or sustain life, or (c) whose
be reasonably expected to cause the failure of the life
failure to perform when properly used in accordance
support device or system, or to affect its safety or
with instructions for use provided in the labeling, can be
reasonably expected to result in significant injury to the
effectiveness.
user.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Definition
Advance Information
Formative or
In Design
This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
Preliminary
First Production
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.
No Identification Needed
Full Production
This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
Obsolete
Not In Production
This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
Rev. I18
www.fairchildsemi.com
11 ©2006 Fairchild Semiconductor Corporation
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet FMS6346.PDF ] | |
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