FMS6646 datasheet(2/14 Pages) ONSEMI

2 / 14 page

May 2011

www.fairchildsemi.com

FMS6646 • Rev. 1.0.3

FMS6646

Six Channel, SD/HD 1080p Video Filter Driver

Features

 Three Selectable 8/75MHz (SD/HD 1080p) Filters

 Three Fixed 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

 Robust Output ESD Protection: 9kV HBM

Applications

 Cable and Satellite Set-Top Boxes

 DVD Players

 HDTV

 Personal Video Recorders (PVR)

 Video On Demand (VOD)

Description

The FMS6646 Low Cost Video Filter (LCVF) is intended

to replace passive LC ﬁlters and drivers with a low-cost

integrated device. Six Butterworth ﬁlters provide

improved image quality compared to typical passive

solutions. The combination of low-power Standard-

Deﬁnition (SD) and High-Deﬁnition (HD 1080p) ﬁlters

greatly simplifies DVD video output circuitry. Three

channels offer ﬁxed SD ﬁlters, while the other three are

selectable between SD and HD ﬁlters.

The FMS6646 offers a ﬁxed gain of 6dB.

The FMS6646 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 the Applications Information

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 are

offset approximately +280mV at the output.

Ordering Information

Part Number

Operating

Temperature Range

Gain Setting

Package

Packing

Method

FMS6646MTC20X

-40°C to +85°C

6dB

TSSOP-20

2500 / Reel

Figure 1. Block Diagram

SD IN1

Transparent Clamp

8MHz, 6 th order

SD/HD

SD IN2

SD IN3

SD OUT1

SD OUT2

SD OUT3

SD/HD 1080p IN1

SD/HD 1080p IN2

SD/HD 1080p IN3

SD/HD 1080p OUT2

SD/HD 1080p OUT3

SD/HD 1080p OUT1

FcSEL

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